Diagnostic Test

CHECK FOR AN ACTIVE DTC 

1. Turn the ignition on.
2. With the scan tool, read Transmission Control Module (TCM) DTCs and record on the repair order.

   Is this DTC active?

   Yes 

   • Perform the NO RESPONSE FROM ESM (ELECTRONIC SHIFT MODULE) diagnostic procedure. Refer to DIAGNOSIS AND TESTING .

   No 

   • Perform the STORED LOST COMMUNICATION DTCS diagnostic procedure. Refer to DIAGNOSIS AND TESTING .