Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE:

Make sure the battery is fully charged before proceeding.

Turn the ignition on.
With the scan tool, read the active DTCs.
Does the scan tool display: U0100-LOST COMMUNICATION WITH ECM/PCM?

Yes
- Refer to U1701-87-LOST COMMUNICATION WITH PCM and perform the U1701-87-Lost Communication with PCM diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.