Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Lincoln Navigator RWDFACTORY OEM SERVICE PROCEDURE
Anti-Lock Control DTCS
ANTI-LOCK BRAKE CONTROL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| B1342 | ECU is Defective | Anti-Lock Brake Control Module | CLEAR the DTCs. RETRIEVE the DTCs. If other DTCs are retrieved, REPAIR them. CLEAR the DTCs, and REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new ABS module. Refer to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . |
| B1483 | Brake Pedal Input Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST B . |
| B1676 | Battery Pack Voltage Out of Range | Anti-Lock Brake Control Module | Go To PINPOINT TEST C . |
| B2477 | Module Configuration Failure | Anti-Lock Brake Control Module | CONFIGURE the anti-lock brake control module. Refer to MODULE CONFIGURATION . CLEAR the DTCs. REPEAT the self-test. If DTC B2477 is retrieved again, INSTALL a new anti-lock brake control module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . REPEAT the self-test. |
| C1095 | Hydraulic Pump Motor Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST D . |
| C1145 | Speed Wheel Sensor RF Input Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST E . |
| C1155 | Speed Wheel Sensor LF Input Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST E . |
| C1165 | Speed Wheel Sensor RR Input Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST F . |
| C1175 | Speed Wheel Sensor LR Input Circuit Failure | Anti-Lock Brake Control Module | Go To PINPOINT TEST E . |
| C1233 | Speed Wheel LF Input Signal Missing | Anti-Lock Brake Control Module | Go To PINPOINT TEST F . |
| C1234 | Speed Wheel RF Input Signal Missing | Anti-Lock Brake Control Module | Go To PINPOINT TEST F . |
| C1235 | Speed Wheel RR Input Signal Missing | Anti-Lock Brake Control | Go To PINPOINT TEST F . |
| C1236 | Speed Wheel LR Input Signal Missing | Anti-Lock Brake Control Module | Go To PINPOINT TEST F . |
| C2769 | Longitudinal Acceleration Sensor Circuit Failure | Anti-Lock Brake Control Module | INSTALL a new ABS module. Refer to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. REPEAT the self-test. |
| C2770 | Longitudinal Acceleration Sensor Signal Fault | Anti-Lock Brake Control Module | INSTALL a new ABS module. Refer to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. REPEAT the self-test. |
| U1009 | SCP (J1850) Invalid or Missing Data for Engine Torque | ABS | CARRY OUT the PCM self-test. |
| U1027 | SCP (J1850) Invalid or Missing Data for Engine RPM | ABS | CARRY OUT the PCM self-test. |
| U1262 | SCP (J1850) Communication Bus Fault | ABS | Refer to MODULE COMMUNICATIONS NETWORK . |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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