Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 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 8
CHECK THE INTERNAL FUSED B(+) CIRCUIT FOR AN OPEN

Fig 1: Checking Internal Fused B(+) Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition OFF to the LOCK position.
2. Remove the Transmission Control Relay.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Ignition ON, Engine Not Running.
4. Using a 12-volt test light connected to ground, check the internal Fused B(+) circuit in the Transmission Control Relay connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the internal Fused B(+) circuit for an open. If the fuse is open make sure to check for a short to ground.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE TRANSMISSION CONTROL RELAY
1. Turn the ignition OFF to the LOCK position.
2. Install a substitute relay in place of the Transmission Control Relay.
3. Start the vehicle.
4. With the scan tool, read DTCs.
  Did DTC P0882 reset?
  
  Yes
  - Go To 4
  No
  - Replace the Transmission Control Relay.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR AN OPEN

Fig 2: Checking Transmission Control Output Circuit For An Open
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.
  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.
4. Connect a jumper wire between the internal Fused B(+) circuit and the (T16) Transmission Control Output circuit in the Transmission Control Relay connector.
5. Ignition ON, Engine Not Running.
6. Using a 12-volt test light connected to ground, check all four (T16) Transmission Control Output circuits in the PCM C4 harness connector and Transmission Solenoid/TRS Assembly harness connector.
  Does the test light illuminate brightly on all four (T16) Transmission Control Output circuits?
  
  Yes
  - Go To 5
  No
  - Repair the (T16) Transmission Control Output circuit(s) for an open or high resistance.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR A SHORT TO GROUND

Fig 3: Checking Transmission Control Output Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition OFF to the LOCK position.
2. Disconnect the TIPM C2 harness connector.
3. Measure the resistance between ground and the (T16) Transmission Control Output circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T16) Transmission Control Output circuit for a short to ground.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 6
CHECK THE (T15) TRANSMISSION CONTROL CIRCUIT FOR A SHORT TO GROUND

Fig 4: Checking Transmission Control Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the TIPM C1 harness connector.
2. Measure the resistance of the (T15) Transmission Control circuit between ground and the appropriate terminal of the (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T15) Transmission Control circuit for a short to ground.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 7
CHECK THE (T15) TRANSMISSION CONTROL CIRCUIT FOR AN OPEN

Fig 5: Checking Transmission Control Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (T15) Transmission Control circuit between the TIPM C1 harness connector and the appropriate terminal of the (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T15) Transmission Control circuit for an open.
  - Perform the 66RFE 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.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK 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 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Test Complete.