Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read all DTCs and record on the repair order.
2. Record the Event Data and Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read TCM DTCs and record on the repair order.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK (T3) TRS SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the TCM harness connector.
3. Disconnect the Transmission assembly harness connector.
4. Measure the resistance of the (T3) TRS signal circuit between the TCM harness connector and the Transmission assembly harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (T3) TRS signal circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
CHECK (T3) TRS SIGNAL CIRCUIT FOR A SHORT ANOTHER CIRCUIT
1. Check for continuity between the (T3) TRS signal circuit and all other circuits at the TCM harness connector.
  Is there continuity between the (T3) TRS signal circuit and any other circuit?
  
  Yes
  - Repair the (T3) TRS signal circuit for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  No
  
  NOTE:
  If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
  - Using the schematics as a guide, check the Transmission Control Module (TCM) connector and all related in-line connector terminals for corrosion, damage, or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace the TCM and perform programming and PROXI Configuration Alignment procedures. (Refer to TCM ADAPTATION - 948TE AND 9HP48 ).
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  - If vehicle does not pass the TRANSMISSION VERIFICATION TEST, replace the TRS in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .