Diagnostic Test
- 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.
- Ignition on, engine not running.
- With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go to step 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
- DTC U0001-CAN C BUS IS ACTIVE IN THE PCM
- With a scan tool, select View DTCs.
Is the DTC U0001-CAN C BUS Active in the PCM?
Yes
- Perform the diagnostic procedure for the U0001-CAN C BUS. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing .
No
- Go to step 3
- With a scan tool, select View DTCs.
- ABS MODULE IS ACTIVE ON THE CAN C BUS
- Using the Network Review Screen on the scan tool, verify that the ABS Module is active on the bus.
Is the ABS Module active on the bus?
Yes
- Go to step 4
No
- Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing for No Response diagnostic procedures.
- Using the Network Review Screen on the scan tool, verify that the ABS Module is active on the bus.
- DTC U0001-CAN C BUS ACTIVE IN THE FCM
- With the scan tool, select View DTCs in the FCM.
Is the DTC U0001-CAN C BUS Active in the FCM?
Yes
- Replace the ABS Module in accordance with the Service Information.
- Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
- Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
- With the scan tool, select View DTCs in the FCM.