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Home / DTC / C1408 — Brake Electronic Control Module Fault

C1408 — Brake Electronic Control Module Fault

Detailed page for trouble code C1408.

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C1408

Generic C — Chassis

Brake Electronic Control Module Fault

Brand: Generic
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Internal ECU hardware or software failure
  • Loss of power supply (blown fuse, relay fault, poor battery connection)
  • Poor or corroded ground connection
  • Damaged or loose connector(s) at the brake module
  • CAN/LIN network communication fault (open/short/intermittent)
  • Related sensor/wiring faults (wheel speed sensors, brake pressure sensor) causing module errors

Symptoms

  • ABS, ESC, or brake warning lamp illumination
  • Traction control/ESC functions disabled or intermittently unavailable
  • ABS fails to operate (longer stopping distances under ABS conditions)
  • Inability to communicate with brake ECU via diagnostic tool or partial response
  • Stored fault codes related to brake module or communication errors
  • Possible degraded braking feel or unexpected brake system behavior

What to check

  • Read and record all stored codes and freeze frame data from all control modules
  • Check battery voltage at key-on and engine-running (should be ~12.4–14.8 V)
  • Inspect and verify fuses and relays for ABS/brake module
  • Visually inspect brake ECU connector and wiring for corrosion, damage, bent pins or moisture
  • Verify module ground(s) for continuity and good contact to chassis
  • Check CAN bus wires for open/short and measure CAN H/L idle voltages (~2.5 V differential around 2.5 V)

Signal parameters

  • Module supply voltage (key ON, cranking, running)
  • Module ground continuity and resistance to chassis
  • CAN H and CAN L voltages and bus idle differential
  • Module wake/diagnostic response on scan tool (module present/absent)
  • Wheel speed sensor signal waveforms and frequency at wheel speeds
  • ABS pump motor and valve driver current (if applicable)

Diagnostic algorithm

  1. Connect a professional scan tool; record all current and history codes from brake and related modules, then clear codes and observe if C1408 returns
  2. Verify battery state-of-charge and charging system; ensure battery voltage is stable during cranking and tests
  3. Inspect fuses and relays for the brake/ABS module; replace suspect items and retest communication
  4. Visually inspect module connector and wiring harness; disconnect and inspect pins for corrosion, bent pins, or water intrusion; repair as needed
  5. Check and clean module ground(s); measure resistance to chassis (
  6. Check CAN bus wiring for continuity and shorts to ground/power; measure CAN H/L idle voltages with a DMM or scope; repair wiring faults
  7. Verify wheel speed sensors and other inputs the module requires; compare sensor signals to expected values with scope or oscilloscope
  8. If module hardware and wiring check good but fault persists, check for required software updates or coding; attempt reprogramming/reflashing per manufacturer procedure
  9. If software reflash and wiring are confirmed good and the fault persists, consider replacing the brake ECU and ensure proper coding/initialization/programming after replacement
  10. After repairs, clear codes and perform road test with live data to confirm correct operation of ABS/ESC and that C1408 does not return

Likely causes

  • Blown fuse or faulty ABS relay supplying module
  • Poor ground at module chassis point
  • Damaged module connector pins or corroded terminals
  • Intermittent CAN bus open/short between module and gateway/ECU
  • Low battery or unstable supply during ignition/self-test
  • Module internal failure after contamination or impact

Fault status

⚠️ Status
Brake Electronic Control Module fault detected. ABS/ESC may be disabled; service required to restore normal brake system functions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

C1408

LAND ROVER C — Chassis

Steering Angle Sensor — Implausible/Erratic Signal

Brand: LAND ROVER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Internal ECU hardware or software failure
  • Loss of power supply (blown fuse, relay fault, poor battery connection)
  • Poor or corroded ground connection
  • Damaged or loose connector(s) at the brake module
  • CAN/LIN network communication fault (open/short/intermittent)
  • Related sensor/wiring faults (wheel speed sensors, brake pressure sensor) causing module errors

Symptoms

  • ABS, ESC, or brake warning lamp illumination
  • Traction control/ESC functions disabled or intermittently unavailable
  • ABS fails to operate (longer stopping distances under ABS conditions)
  • Inability to communicate with brake ECU via diagnostic tool or partial response
  • Stored fault codes related to brake module or communication errors
  • Possible degraded braking feel or unexpected brake system behavior

What to check

  • Read and record all stored codes and freeze frame data from all control modules
  • Check battery voltage at key-on and engine-running (should be ~12.4–14.8 V)
  • Inspect and verify fuses and relays for ABS/brake module
  • Visually inspect brake ECU connector and wiring for corrosion, damage, bent pins or moisture
  • Verify module ground(s) for continuity and good contact to chassis
  • Check CAN bus wires for open/short and measure CAN H/L idle voltages (~2.5 V differential around 2.5 V)

Signal parameters

  • Module supply voltage (key ON, cranking, running)
  • Module ground continuity and resistance to chassis
  • CAN H and CAN L voltages and bus idle differential
  • Module wake/diagnostic response on scan tool (module present/absent)
  • Wheel speed sensor signal waveforms and frequency at wheel speeds
  • ABS pump motor and valve driver current (if applicable)

Diagnostic algorithm

  1. Connect a professional scan tool; record all current and history codes from brake and related modules, then clear codes and observe if C1408 returns
  2. Verify battery state-of-charge and charging system; ensure battery voltage is stable during cranking and tests
  3. Inspect fuses and relays for the brake/ABS module; replace suspect items and retest communication
  4. Visually inspect module connector and wiring harness; disconnect and inspect pins for corrosion, bent pins, or water intrusion; repair as needed
  5. Check and clean module ground(s); measure resistance to chassis (
  6. Check CAN bus wiring for continuity and shorts to ground/power; measure CAN H/L idle voltages with a DMM or scope; repair wiring faults
  7. Verify wheel speed sensors and other inputs the module requires; compare sensor signals to expected values with scope or oscilloscope
  8. If module hardware and wiring check good but fault persists, check for required software updates or coding; attempt reprogramming/reflashing per manufacturer procedure
  9. If software reflash and wiring are confirmed good and the fault persists, consider replacing the brake ECU and ensure proper coding/initialization/programming after replacement
  10. After repairs, clear codes and perform road test with live data to confirm correct operation of ABS/ESC and that C1408 does not return

Likely causes

  • Blown fuse or faulty ABS relay supplying module
  • Poor ground at module chassis point
  • Damaged module connector pins or corroded terminals
  • Intermittent CAN bus open/short between module and gateway/ECU
  • Low battery or unstable supply during ignition/self-test
  • Module internal failure after contamination or impact

Fault status

⚠️ Status
Brake Electronic Control Module fault detected. ABS/ESC may be disabled; service required to restore normal brake system functions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C1201 C1241 C1256 C0210 C0221
320

Browse 320 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

C1408

MITSUBISHI C — Chassis

Actuator relay failure

Brand: MITSUBISHI
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Internal ECU hardware or software failure
  • Loss of power supply (blown fuse, relay fault, poor battery connection)
  • Poor or corroded ground connection
  • Damaged or loose connector(s) at the brake module
  • CAN/LIN network communication fault (open/short/intermittent)
  • Related sensor/wiring faults (wheel speed sensors, brake pressure sensor) causing module errors

Symptoms

  • ABS, ESC, or brake warning lamp illumination
  • Traction control/ESC functions disabled or intermittently unavailable
  • ABS fails to operate (longer stopping distances under ABS conditions)
  • Inability to communicate with brake ECU via diagnostic tool or partial response
  • Stored fault codes related to brake module or communication errors
  • Possible degraded braking feel or unexpected brake system behavior

What to check

  • Read and record all stored codes and freeze frame data from all control modules
  • Check battery voltage at key-on and engine-running (should be ~12.4–14.8 V)
  • Inspect and verify fuses and relays for ABS/brake module
  • Visually inspect brake ECU connector and wiring for corrosion, damage, bent pins or moisture
  • Verify module ground(s) for continuity and good contact to chassis
  • Check CAN bus wires for open/short and measure CAN H/L idle voltages (~2.5 V differential around 2.5 V)

Signal parameters

  • Module supply voltage (key ON, cranking, running)
  • Module ground continuity and resistance to chassis
  • CAN H and CAN L voltages and bus idle differential
  • Module wake/diagnostic response on scan tool (module present/absent)
  • Wheel speed sensor signal waveforms and frequency at wheel speeds
  • ABS pump motor and valve driver current (if applicable)

Diagnostic algorithm

  1. Connect a professional scan tool; record all current and history codes from brake and related modules, then clear codes and observe if C1408 returns
  2. Verify battery state-of-charge and charging system; ensure battery voltage is stable during cranking and tests
  3. Inspect fuses and relays for the brake/ABS module; replace suspect items and retest communication
  4. Visually inspect module connector and wiring harness; disconnect and inspect pins for corrosion, bent pins, or water intrusion; repair as needed
  5. Check and clean module ground(s); measure resistance to chassis (
  6. Check CAN bus wiring for continuity and shorts to ground/power; measure CAN H/L idle voltages with a DMM or scope; repair wiring faults
  7. Verify wheel speed sensors and other inputs the module requires; compare sensor signals to expected values with scope or oscilloscope
  8. If module hardware and wiring check good but fault persists, check for required software updates or coding; attempt reprogramming/reflashing per manufacturer procedure
  9. If software reflash and wiring are confirmed good and the fault persists, consider replacing the brake ECU and ensure proper coding/initialization/programming after replacement
  10. After repairs, clear codes and perform road test with live data to confirm correct operation of ABS/ESC and that C1408 does not return

Likely causes

  • Blown fuse or faulty ABS relay supplying module
  • Poor ground at module chassis point
  • Damaged module connector pins or corroded terminals
  • Intermittent CAN bus open/short between module and gateway/ECU
  • Low battery or unstable supply during ignition/self-test
  • Module internal failure after contamination or impact

Fault status

⚠️ Status
Brake Electronic Control Module fault detected. ABS/ESC may be disabled; service required to restore normal brake system functions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C1201 C1241 C1256 C0210 C0221
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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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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