Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 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

Fig 1: Checking Pressure Signal Circuits Shorted To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition OFF to the LOCK position.
2. Disconnect the PCM C4 harness connector and connect the (special tool #8815A, Kit, NGC, 38 Position).
3. Disconnect the Transmission Solenoid/TRS Assembly harness connector.
4. Remove the Transmission Control Relay.
  NOTE:
  Note: Check connectors - Clean/repair as necessary.
  
  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 Miller tool 8815A to perform diagnosis.
5. Connect a jumper wire between the internal Fused B(+) circuit and the Transmission Control Output circuit in the Transmission Control Relay connector.
6. Ignition ON, Engine Not Running.
7. Measure the voltage of the (T147) 2C, (T48) 4C, (T50) L/R, (T9) OD and (T29) UD Pressure Signal circuits in the (special tool #8815A, Kit, NGC, 38 Position).
  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 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
TRANSMISSION SOLENOID/TRS ASSEMBLY

Fig 2: Checking Pressure Signal Circuits Shorted To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition OFF to the LOCK position.
2. Remove the jumper wire.
  NOTE:
  Do not reinstall the Transmission Relay.
3. Reconnect the Transmission Solenoid/TRS Assembly harness connector.
4. 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 (special tool #8815A, Kit, NGC, 38 Position).
  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. (Refer to ASSEMBLY, TRANSMISSION SOLENOID AND TRS, REMOVAL .
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 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. For gas, refer to MODULE, POWERTRAIN CONTROL, REMOVAL For diesel, refer to MODULE, POWERTRAIN CONTROL, 6.7L DIESEL, REMOVAL .
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 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 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Test Complete.