Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

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.
1. Start the engine and test drive the vehicle in accordance with the monitoring conditions.
2. 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
1. 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 DIAGNOSTIC CODE INDEX - 8HP70 AUTOMATIC TRANSMISSION - 1500 article and perform the appropriate diagnostic procedure.
  No
  - Replace the Transmission Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .