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Home / DTC / P1676 — Traction Control System FI Data Line No Signal

P1676 — Traction Control System FI Data Line No Signal

Detailed page for trouble code P1676.

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23,694specific
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Code

P1676

ACURA P — Powertrain

Traction Control System FI Data Line No Signal

Brand: ACURA
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Code

P1676

BUICK P — Powertrain

Driver 4 Line 6

Brand: BUICK
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Code

P1676

CADILLAC P — Powertrain

Driver 4 Line 6

Brand: CADILLAC
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
206

Browse 206 CADILLAC manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CADILLAC

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Code

P1676

CHEVROLET P — Powertrain

Driver 4 Line 6

Brand: CHEVROLET
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
917

Browse 917 CHEVROLET manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CHEVROLET

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

GM P — Powertrain

Driver 4 Line 6

Brand: GM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

GMC P — Powertrain

Driver 4 Line 6

Brand: GMC
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

HONDA P — Powertrain

Traction Control System FI Data Line No Signal

Brand: HONDA
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

HUMMER P — Powertrain

Driver 4 Line 6

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
Repair manuals

Manual library for HUMMER

138

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Code

P1676

HYUNDAI P — Powertrain

Powertrain Control Module Internal Fault

Brand: HYUNDAI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

P1676

INFINITI P — Powertrain

Traction Control System FI Data Line No Signal

Brand: INFINITI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Code

P1676

LAND ROVER P — Powertrain

Incompatible injector data

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P1676

OLDSMOBILE P — Powertrain

Driver 4 Line 6

Brand: OLDSMOBILE
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Code

P1676

SAAB P — Powertrain

Injector Circuit Open / Short To Ground Or B+

Brand: SAAB
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

SATURN P — Powertrain

Driver 4 Line 6

Brand: SATURN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
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Keep it short and practical. Up to 500 characters.
Send to email
Code

P1676

VOLKSWAGEN P — Powertrain

Drive By Wire MIL Circuit Electrical Malfunction

Brand: VOLKSWAGEN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring on the TCS/ABS communication/data line
  • Corroded, loose or damaged connector at the traction control/ABS module or wiring harness
  • Blown fuse or lost power/ground to the TCS/ABS module
  • Faulty traction control/ABS module (internal failure)
  • CAN/LIN or proprietary network bus fault (failed termination resistor, short, or high impedance)
  • Intermittent wiring damage or pinched harness

Symptoms

  • Traction control (TCS/ESC/VSA) warning lamp illuminated
  • ABS or VSA warning lamp may also be on
  • Loss of traction control functionality or limited functionality (no TCS interventions)
  • Possible engine warning light or reduced engine performance in some vehicles
  • Intermittent electrical faults or faults appearing after movement/wiring flex

What to check

  • Read all stored and pending DTCs from ABS/TCS and engine control modules and record freeze frame data
  • Verify battery voltage and vehicle charging system are within specification
  • Inspect fuses and fusible links related to ABS/TCS and associated power/IGN circuits
  • Visually inspect connectors and harnesses at the ABS/TCS module, ECM and DLC for corrosion, bent pins, or damage
  • Perform wiggle test of wiring while monitoring live bus/messages with a scan tool
  • Measure CAN/CAN-FD/LIN or data-line voltages at the DLC and at the ABS/TCS module connector

Signal parameters

  • If on standard CAN: idle (recessive) ~2.5 V on CAN High and CAN Low; dominant states: CANH ≈ 3.5 V, CANL ≈ 1.5 V
  • Typical bus differential idle ~0 V, dominant differential ~2 V
  • Termination resistance between CANH and CANL ≈ 60 ohms (two 120 Ω terminators in parallel)
  • If system uses LIN: idle (dominant high) close to battery voltage via pull-up; data pulses to ground
  • If proprietary single-wire data line (manufacturer-specific): expect serial pulses referenced to vehicle ground — consult service manual for exact voltages and protocol

Diagnostic algorithm

  1. Connect OEM-grade scan tool and read all ABS/TCS and powertrain modules; note all related U-/P- codes and freeze frame data.
  2. Inspect and verify power and ground circuits to the ABS/TCS module (test for battery voltage at the module’s power terminal with key ON).
  3. Check relevant fuses and relays; replace any blown items and retest.
  4. Visually inspect connectors and wiring between ECM, ABS/TCS module and DLC for damage, corrosion, or loose pins; repair as needed.
  5. With ignition ON (engine off), measure CANH and CANL (or data line) voltages at the data-link connector and at the ABS/TCS module connector. Compare to expected values.
  6. Measure termination resistance across CANH–CANL with ignition off; if not ~60 Ω, locate missing or shorted terminator.
  7. Perform a wiggle/stress test on suspect wiring while monitoring communication on a scan tool to reproduce the fault.
  8. If wiring and power/grounds pass, follow module isolation: disconnect ABS/TCS module and check whether bus communication is restored or other modules report errors.
  9. If module is suspected faulty after wiring checks, consult service manual for module firmware updates or reprogramming procedures before replacement.
  10. After repairs, clear codes and road test while monitoring live data to confirm the fault does not return.

Likely causes

  • Damaged connector or wiring between ABS/TCS module and ECM
  • Blown fuse or poor ground affecting the TCS module
  • Loss of CAN/LIN bus communication due to short or failed termination
  • Failed traction control/ABS module

Fault status

⚠️ Status
Traction Control System FI data line not detected/no communication from TCS module to control network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0121 U0100 U0073 U1000 P1610
626

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