Diagnostic Test

CHECK FOR AN ACTIVE DTC

NOTE:

Make sure the IOD fuse is installed and the battery is fully charged before proceeding.

Turn the ignition on.
With the scan tool, read DTCs and record on the repair order.
Is this DTC active?

Yes
- Refer to DIAGNOSIS AND TESTING and perform the U0168-Lost Communication with Vehicle Security Control Module (WIN) diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.