Diagnostic Test
- CHECK FOR AN ACTIVE DTC 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.
NOTE:Diagnose all CAN communication DTCs before continuing.
- Turn the ignition on.
- With a scan tool, view DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.
- CHECK FOR ABS/ESP COMMUNICATION RELATED DTCS IN OTHER MODULES
- With a scan tool check for ABS/ESP lost messages/communication related DTCs in other modules on the CAN Bus.
Are there any ABS/ESP lost messages/communication related DTCs in other modules on the CAN Bus at this time?
Yes
- Replace and program the ABS Module in accordance with the service information.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- With a scan tool check for ABS/ESP lost messages/communication related DTCs in other modules on the CAN Bus.