Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IF THE DTC IS CURRENT
1. With the scan tool, read DTCs.
  Is the status Active or is the Starts Since Set counter 0 for this DTC?
  
  Yes
  - Go To 2
  No
  - Go To 4
PRESSURE SIGNAL CIRCUITS SHORTED TO VOLTAGE
2. Turn the Ignition OFF.
3. Disconnect the PCM C1 harness connector.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
4. Important: The GPEC Diagnostic Adaptor can add up to 1.5 Ohms of resistance to the circuit.
5. Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
6. Disconnect the Transmission Solenoid/TRS Assembly harness connector.
7. Connect a fused jumper wire or a 12-volt test light connected to 12-volts to the T15 Transmission Control circuit on the appropriate terminal of the GPEC Diagnostic Adaptor to actuate the internal TCM relay in the PDC.
8. Turn the Ignition ON, Engine not running.
9. Measure the voltage of the (T147) 2C, (T48) 4C, (T50) L/R, (T9) OD and (T29) UD Pressure Signal circuits in the GPEC Diagnostic Adaptor.
  Is the voltage above 0.5 volts on any of the measured circuits?
  
  Yes
  - Repair the (T147) 2C, (T48) 4C, (T50) L/R, (T9) OD and/or (T29) UD Pressure Signal circuit(s) for a short to voltage.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
TRANSMISSION SOLENOID/TRS ASSEMBLY
1. Turn the Ignition OFF.
2. Remove the jumper wire or 12-volt test light from the T15 Transmission Control circuit in the GPEC Diagnostic Adaptor.
3. Reconnect the Transmission Solenoid/TRS Assembly harness connector.
4. Turn the Ignition ON, Engine not running.
5. Measure the voltage of the (T147) 2C, (T48) 4C, (T50) L/R, (T9) OD and (T29) UD Pressure Signal circuits in the GPEC Diagnostic Adaptor.
  Is the voltage above 0.5 volts on any of the sense circuits?
  
  Yes
  - Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) 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 PCM in accordance with the Service Information. With the scan tool, perform a Quick Learn. Refer to MODULE, POWERTRAIN CONTROL, (PCM) 5.7L / 6.4L, REMOVAL or MODULE, POWERTRAIN CONTROL, (PCM) 6.7L DIESEL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. With the scan tool, check the Event Data to help identify the conditions in which the DTC set.
  Where any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Test Complete.