Diagnostic Test

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE:

Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

Using the scan tool, read active DTCs.
Is this DTC active?

Yes
- Refer to DIAGNOSTIC CODE INDEX and perform the U0010-CAN Interior Bus diagnostic procedure.
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .