Diagnostic Test
- TEST FOR INTERMITTENT CONDITION
- Turn the ignition on.
- With the scan tool, record and erase DTCs.
- Cycle the ignition from on to off 3 times.
- Turn the ignition on.
- With the scan tool, read DTCs.
Does the scan tool display: U0019-CAN B BUS CIRCUIT?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK TOTALLY INTEGRATED POWER MODULE DTCs
- With the scan tool, read Totally Integrated Power Module DTCs
Does the scan tool display any CAN B BUS DTCs - ACTIVE?
Yes
- Perform the appropriate diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
No
- Go To 3
- With the scan tool, read Totally Integrated Power Module DTCs
- CAN B BUS (+) CIRCUIT OPEN
- Turn the ignition off.
- Disconnect the Radio harness connector.
- Disconnect the Totally Integrated Power Module C3 harness connector.
- Measure the resistance of the (D55) CAN B BUS (+) circuit between the Totally Integrated Power Module C3 harness connector and the Radio C1 harness connector.
Is the resistance below 2.0 Ohms?
Yes
- Go To 4
No
- Repair the CAN B BUS (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CAN B BUS (-) CIRCUIT OPEN
- Measure the resistance of the (D54) CAN B BUS (-) circuit between the Totally Integrated Power Module C3 harness connector and the Radio harness connector.
Is the resistance below 2.0 Ohms?
Yes
- Replace the Radio in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Repair the CAN B BUS (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Measure the resistance of the (D54) CAN B BUS (-) circuit between the Totally Integrated Power Module C3 harness connector and the Radio harness connector.