Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- With the scan tool, read DTCs and record on the repair order.
Is the DTC active or pending?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- CHECK THE ABS MODULE FOR ACTIVITY ON THE CAN C BUS NOTE:
For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.
- With the scan tool, verify that the ABS Module is active on the CAN C bus.
Is the ABS Module active on the CAN C bus?
Yes
- Go To 3
No
- Perform the NO RESPONSE FROM ABS procedure. Refer to DIAGNOSIS AND TESTING .
- With the scan tool, verify that the ABS Module is active on the CAN C bus.
- CHECK FOR DTCS IN THE ABS MODULE
- With the scan tool, read ABS Module DTCs.
Are any DTCs set in the ABS Module?
Yes
- Perform the applicable ABS Module DTC procedure(s). Refer to DIAGNOSTIC CODE INDEX .
No
- Go To 4
- With the scan tool, read ABS Module DTCs.
- CHECK FOR ABS DTCS IN THE PCM
- With the scan tool, read PCM DTCs.
Are any ABS related DTCs active or stored in the PCM?
Yes
- Replace the ABS Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL AND INSTALLATION .
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
No
- Replace and program the PCM in accordance with the Service Information.
Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- With the scan tool, read PCM DTCs.