Diagnostic Test

1) CHECK IF FCM CAN BUS DTCS ARE PRESENT
With the scan tool, read FCM DTCs.

Are there any FCM CAN BUS DTCs present?

Yes
1. Refer to DIAGNOSIS AND TESTING and diagnose the appropriate symptom.
2. Perform ABS VERIFICATION TEST .
No
1. Go to 2).
2) CHECK IF TRANSMISSION DTCS ARE PRESENT
With the scan tool, read Transmission DTCs.

Are there any Transmission DTCs present?

Yes
1. Refer to 545RFE - ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom.
2. Perform ABS VERIFICATION TEST .
No
1. Using the schematics as a guide, check the Anti-Lock Brake Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Anti-Lock Brake Module per the Service Information.
2. Perform ABS VERIFICATION TEST .