Diagnostic Test
- CHECK FOR AN ACTIVE DTC NOTE:
This DTC could set during towing if the Manual Park Release Cable was not fully pulled and the pawl is in an intermediate position for too long.
- Start the engine and test drive the vehicle in accordance with the monitoring conditions.
- With the scan tool read DTCs.NOTE:
Diagnose and repair any CAN bus communication faults before continuing.
Is the DTC active or pending?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- CHECK FOR TRANSMISSION CONTROL MODULE (TCM) DTCS
- With the scan tool, read TCM DTCs.
Does the TCM also have a DTC present for the Park/Neutral Switch or TRS Signal circuits?
Yes
- Refer to 948TE/9HP48 - DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
No
- Replace the Transmission Control Module in accordance with the Service Information.
- With the scan tool, read TCM DTCs.