Diagnostic Test

CHECK FOR SHIFT LEVER ASSEMBLY DTCS
1. With the scan tool, check for Shift Lever Assembly DTCs.
  Are there any Shift Lever Assembly DTCs present?
  
  Yes
  - Refer to Diagnosis and Testing .
  - Refer to Standard Procedure and perform NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 2.
CHECK THE SHIFT LEVER ASSEMBLY CABLE FOR PROPER ADJUSTMENT
1. Check the Shift Lever Assembly Cable for proper adjustment. Refer to NAG1 AUTOMATIC TRANSMISSION - SERVICE INFORMATION for the appropriate service procedure.
  Is the Shift Lever Assembly Cable for properly adjusted?
  
  Yes
  - Go To 3.
  No
  - Adjust the Shift Lever Assembly Cable in accordance to the Service Information.
  - Refer to Standard Procedure and perform NAG1 TRANSMISSION VERIFICATION TEST.
CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Temperature Sensor-P/N Switch Signal Circuit Is Shorted To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C2 harness connector.
3. Measure the resistance between ground and the (T54) Temperature Sensor-P/N Switch Signal circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to ground.
  - Refer to Standard Procedure and perform NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 4.
CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 2: Identifying Temperature Sensor-P/N Switch Signal Circuit Connector Terminal
Courtesy of CHRYSLER LLC
1. Disconnect the TCM C1 harness connector.
2. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector.
3. Measure the resistance between the (T54) Temperature Sensor-P/N Switch Signal circuit and all other circuits in the TCM C1 and C2 harness connectors.
  Is the resistance below 5.0 ohms between the (T54) Temperature Sensor-P/N Switch Signal circuit and any other circuit(s)?
  
  Yes
  - Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to another circuit(s).
  - Refer to Standard Procedure and perform NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance to the Service Information.
  - Refer to Standard Procedure and perform NAG1 TRANSMISSION VERIFICATION TEST.