D602

D602-THE CONTROL UNIT SOFTWARE IS FAULTY





For a complete wiring diagram Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Ignition on, engine running.

- Set Condition:
When the ABM/ESP recognizes an internal failure has occurred. One trip fault.





ANTI-LOCK BRAKE MODULE
1. Check for any TSBs that may apply to this fault code.
2. Verify that the ABM is at the latest calibration level.
3. Check the ABM ground circuits with a test light connected to B+.
4. Check the ABM Fused B+ circuit with a test light connected to ground.
5. Check the ABM Main Relay circuits with a test light connected to ground.

Do the ABM power and ground circuits light the test light brightly.

Yes

- Replace and program the Anti-lock Brake Module.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Repair the circuit for an open or shorted condition.
- Perform ABS VERIFICATION TEST. Verification Tests.