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Home / DTC / B1701 — Seat switch, backrest forward

B1701 — Seat switch, backrest forward

Detailed page for trouble code B1701.

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Code

B1701

LAND ROVER B — Body

Seat switch, backrest forward

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty backrest forward switch (mechanical or electrical failure)
  • Corroded, loose or damaged connector at the switch
  • Broken, shorted or pinched wiring between switch and seat control module
  • Blown fuse or faulty relay supplying the seat switch/circuits
  • Faulty seat control module or incorrect programming
  • Foreign object/jam in seat mechanism causing abnormal load/current

Symptoms

  • Backrest will not move forward when the switch is operated
  • Backrest moves intermittently or only after wiggling switch/wiring
  • Other seat adjustment functions may be unaffected or also exhibit faults
  • DTC stored in memory and may illuminate a dashboard message or warning
  • Possible blown fuse for seat circuits

What to check

  • Read and record stored DTC(s) with a scan tool; note freeze frame and module name
  • Verify customer complaint and reproduce the fault by operating the backrest forward switch
  • Visual inspection of switch, trim, connector and wiring for damage or corrosion
  • Check relevant fuses and relays for continuity and proper operation
  • Check for other related DTCs that indicate module, power or CAN communication issues
  • Perform wiggle test on switch and wiring while observing scan tool data or watching for operation

Signal parameters

  • Supply voltage to switch: approx. battery voltage (~12 V) with ignition ON
  • Switch output signal: toggles to near ground or supply depending on design when pressed
  • Expected continuity across switch contacts when actuated (near 0 Ω) and open when released
  • Motor/actuator current draw: should increase when motor is supplied (typical seat motor range — check OEM spec)
  • Seat control module sees a change in input state or a CAN message confirming switch activation

Diagnostic algorithm

  1. Retrieve and record DTC(s) and any freeze frame data with a compatible scan tool. Clear codes and attempt to re-run to confirm reproducibility.
  2. Perform a visual inspection of the backrest forward switch, bezel, connector and wiring. Look for damaged insulation, pin corrosion, and signs of water ingress or impact.
  3. Check fuses and relays associated with the power seats. Replace any blown fuses and re-test.
  4. With ignition ON, backprobe the switch connector. Verify supply voltage is present at the power terminal. If no supply, trace back to fuse/relay/module.
  5. Operate the switch while monitoring the switch output with a multimeter or scope. Confirm the output changes state when the switch is pressed. If no change, suspect the switch.
  6. If the switch output is correct, measure continuity from the switch output pin to the seat control module input pin. Repair any open or high-resistance wiring.
  7. Check grounds for the seat and seat control module for low resistance to chassis. Clean and secure any poor grounds.
  8. If wiring and switch check good, inspect seat motor/actuator for mechanical binding and measure motor current during operation. Excessive current may indicate mechanical fault.
  9. If all inputs and wiring are good but the module does not register the switch, check module power, ground and communication (CAN). Replace or reprogram the seat control module only after verifying wiring and inputs.
  10. After repair or replacement, clear DTC(s) and confirm normal operation through repeated function checks and a final scan.

Likely causes

  • Switch contacts worn or contaminated preventing a proper signal
  • Connector pins pushed out, corroded or poor crimp connection
  • Wire harness damage in seat area (door sill, seat base) from movement
  • Fault in seat control module input stage

Fault status

⚠️ Status
B1701 — Seat switch (backrest forward) circuit fault detected. Possible open, short to ground or supply, intermittent signal, or failed switch/module. Inspect switch, connector, wiring and seat control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1700 B1702 B1710 B1711 B1770
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

B1701

MITSUBISHI B — Body

Intermittent wiper data fail

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty backrest forward switch (mechanical or electrical failure)
  • Corroded, loose or damaged connector at the switch
  • Broken, shorted or pinched wiring between switch and seat control module
  • Blown fuse or faulty relay supplying the seat switch/circuits
  • Faulty seat control module or incorrect programming
  • Foreign object/jam in seat mechanism causing abnormal load/current

Symptoms

  • Backrest will not move forward when the switch is operated
  • Backrest moves intermittently or only after wiggling switch/wiring
  • Other seat adjustment functions may be unaffected or also exhibit faults
  • DTC stored in memory and may illuminate a dashboard message or warning
  • Possible blown fuse for seat circuits

What to check

  • Read and record stored DTC(s) with a scan tool; note freeze frame and module name
  • Verify customer complaint and reproduce the fault by operating the backrest forward switch
  • Visual inspection of switch, trim, connector and wiring for damage or corrosion
  • Check relevant fuses and relays for continuity and proper operation
  • Check for other related DTCs that indicate module, power or CAN communication issues
  • Perform wiggle test on switch and wiring while observing scan tool data or watching for operation

Signal parameters

  • Supply voltage to switch: approx. battery voltage (~12 V) with ignition ON
  • Switch output signal: toggles to near ground or supply depending on design when pressed
  • Expected continuity across switch contacts when actuated (near 0 Ω) and open when released
  • Motor/actuator current draw: should increase when motor is supplied (typical seat motor range — check OEM spec)
  • Seat control module sees a change in input state or a CAN message confirming switch activation

Diagnostic algorithm

  1. Retrieve and record DTC(s) and any freeze frame data with a compatible scan tool. Clear codes and attempt to re-run to confirm reproducibility.
  2. Perform a visual inspection of the backrest forward switch, bezel, connector and wiring. Look for damaged insulation, pin corrosion, and signs of water ingress or impact.
  3. Check fuses and relays associated with the power seats. Replace any blown fuses and re-test.
  4. With ignition ON, backprobe the switch connector. Verify supply voltage is present at the power terminal. If no supply, trace back to fuse/relay/module.
  5. Operate the switch while monitoring the switch output with a multimeter or scope. Confirm the output changes state when the switch is pressed. If no change, suspect the switch.
  6. If the switch output is correct, measure continuity from the switch output pin to the seat control module input pin. Repair any open or high-resistance wiring.
  7. Check grounds for the seat and seat control module for low resistance to chassis. Clean and secure any poor grounds.
  8. If wiring and switch check good, inspect seat motor/actuator for mechanical binding and measure motor current during operation. Excessive current may indicate mechanical fault.
  9. If all inputs and wiring are good but the module does not register the switch, check module power, ground and communication (CAN). Replace or reprogram the seat control module only after verifying wiring and inputs.
  10. After repair or replacement, clear DTC(s) and confirm normal operation through repeated function checks and a final scan.

Likely causes

  • Switch contacts worn or contaminated preventing a proper signal
  • Connector pins pushed out, corroded or poor crimp connection
  • Wire harness damage in seat area (door sill, seat base) from movement
  • Fault in seat control module input stage

Fault status

⚠️ Status
B1701 — Seat switch (backrest forward) circuit fault detected. Possible open, short to ground or supply, intermittent signal, or failed switch/module. Inspect switch, connector, wiring and seat control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1700 B1702 B1710 B1711 B1770
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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Code

B1701

Other B — Body

Seat Driver Recline Forward Switch Circuit Failure

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty backrest forward switch (mechanical or electrical failure)
  • Corroded, loose or damaged connector at the switch
  • Broken, shorted or pinched wiring between switch and seat control module
  • Blown fuse or faulty relay supplying the seat switch/circuits
  • Faulty seat control module or incorrect programming
  • Foreign object/jam in seat mechanism causing abnormal load/current

Symptoms

  • Backrest will not move forward when the switch is operated
  • Backrest moves intermittently or only after wiggling switch/wiring
  • Other seat adjustment functions may be unaffected or also exhibit faults
  • DTC stored in memory and may illuminate a dashboard message or warning
  • Possible blown fuse for seat circuits

What to check

  • Read and record stored DTC(s) with a scan tool; note freeze frame and module name
  • Verify customer complaint and reproduce the fault by operating the backrest forward switch
  • Visual inspection of switch, trim, connector and wiring for damage or corrosion
  • Check relevant fuses and relays for continuity and proper operation
  • Check for other related DTCs that indicate module, power or CAN communication issues
  • Perform wiggle test on switch and wiring while observing scan tool data or watching for operation

Signal parameters

  • Supply voltage to switch: approx. battery voltage (~12 V) with ignition ON
  • Switch output signal: toggles to near ground or supply depending on design when pressed
  • Expected continuity across switch contacts when actuated (near 0 Ω) and open when released
  • Motor/actuator current draw: should increase when motor is supplied (typical seat motor range — check OEM spec)
  • Seat control module sees a change in input state or a CAN message confirming switch activation

Diagnostic algorithm

  1. Retrieve and record DTC(s) and any freeze frame data with a compatible scan tool. Clear codes and attempt to re-run to confirm reproducibility.
  2. Perform a visual inspection of the backrest forward switch, bezel, connector and wiring. Look for damaged insulation, pin corrosion, and signs of water ingress or impact.
  3. Check fuses and relays associated with the power seats. Replace any blown fuses and re-test.
  4. With ignition ON, backprobe the switch connector. Verify supply voltage is present at the power terminal. If no supply, trace back to fuse/relay/module.
  5. Operate the switch while monitoring the switch output with a multimeter or scope. Confirm the output changes state when the switch is pressed. If no change, suspect the switch.
  6. If the switch output is correct, measure continuity from the switch output pin to the seat control module input pin. Repair any open or high-resistance wiring.
  7. Check grounds for the seat and seat control module for low resistance to chassis. Clean and secure any poor grounds.
  8. If wiring and switch check good, inspect seat motor/actuator for mechanical binding and measure motor current during operation. Excessive current may indicate mechanical fault.
  9. If all inputs and wiring are good but the module does not register the switch, check module power, ground and communication (CAN). Replace or reprogram the seat control module only after verifying wiring and inputs.
  10. After repair or replacement, clear DTC(s) and confirm normal operation through repeated function checks and a final scan.

Likely causes

  • Switch contacts worn or contaminated preventing a proper signal
  • Connector pins pushed out, corroded or poor crimp connection
  • Wire harness damage in seat area (door sill, seat base) from movement
  • Fault in seat control module input stage

Fault status

⚠️ Status
B1701 — Seat switch (backrest forward) circuit fault detected. Possible open, short to ground or supply, intermittent signal, or failed switch/module. Inspect switch, connector, wiring and seat control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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B1700 B1702 B1710 B1711 B1770
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