Diagnostic Test
CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- 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 STORED LOST COMMUNICATION DTCS .