Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 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. Start the engine in park.
2. With the scan tool, monitor the Input Speed Sensor rpm.
  Is the Input Speed Sensor rpm below 400 rpm?
  
  Yes
  - Go To 2
  No
  - Go To 9
INPUT SPEED SENSOR
1. Turn the ignition off.
2. Remove the Starter Relay from the PDC.
  CAUTION:
  Removal of the Starter Relay will prevent the vehicle from being started in gear.
  
  WARNING:
  The Starter Relay must be removed from the PDC. Failure to do so may result in possible serious or fatal injury.
3. Install the Transmission Simulator (special tool #8333B, Simulator, Transmission).
4. Ignition on, engine not running.
5. With the Transmission Simulator, set the selector switch to 3000/1000 and the Input/Output switch to ON.
6. With the scan tool, monitor the Input and Output Speed Sensor rpm.
  Does the Input speed read 3000 rpm and the Output speed read 1000 rpm ± 50 rpm?
  
  Yes
  - Replace the Input Speed Sensor in accordance with the Service Information.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
2. Turn the ignition off.
3. Disconnect the PCM C2 harness connector.
  NOTE:
  Make sure to leave the Speed Sensor, Transmission Solenoid/TRS Assembly, and Line Pressure Sensor harness connectors disconnected.
4. Ignition on, engine not running.
5. Measure the voltage of the (T52) Input Speed Sensor Signal circuit.
  Is the voltage above 0.5 of a volt?
  
  Yes
  - Repair the (T52) Input Speed Sensor Signal circuit for a short to voltage.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE
2. Measure the voltage of the (T13) Speed Sensor Ground circuit.
  Is the voltage above 0.5 of a volt?
  
  Yes
  - Repair the (T13) Speed Sensor Ground circuit for a short to voltage.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN
2. Turn the ignition off.
3. Measure the resistance of the (T52) Input Speed Sensor Signal circuit between the Input Speed Sensor harness connector and the appropriate terminal of the PCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (T52) Input Speed Sensor Signal circuit for an open.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR AN OPEN
2. Measure the resistance of the (T13) Speed Sensor Ground circuit between the Input Speed Sensor harness connector and the appropriate terminal of the PCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (T13) Speed Sensor Ground circuit for an open.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 7
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the Input Speed Sensor Signal circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T52) Input Speed Sensor Signal circuit for a short to ground.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 8
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the (T13) Speed Sensor Ground circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T13) Speed Sensor Ground circuit for a short to ground.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  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 Quick Learn.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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 was set.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the 68RFE TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test Complete.