Diagnostic Test
- VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE:
Make sure the battery voltage is between 10 and 16 volts before proceeding.
- Turn the ignition on.
- With the scan tool, read the active DTCs.
Does the scan tool display: U0001-00-CAN C BUS?
Yes
- Perform the U0002-00-CAN C BUS OFF PERFORMANCE diagnostic procedure.
NOTE:For the DTC U0001-00 Can C Bus, use the U0002-00 Can C Bus Off Performance diagnostic procedure.
No
- Refer to Diagnosis and Testing and perform the Stored Lost Communication DTCs diagnostic procedure.