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.

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Turn the ignition on.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE COOLANT TEMPERATURE SENSOR
1. Turn the ignition off.
2. Disconnect the Engine Coolant Temperature Sensor (ECT) harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between ground and one of the terminals of the ECT Sensor.
  Is the resistance below 10k Ohms?
  
  Yes
  - Replace the Engine Coolant Temperature Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Engine Coolant Temperature Sensor Connector Pin ID
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance between ground and the (K2) ECT Sensor Signal circuit at the ECT Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K2) ECT Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK FOR THE (K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K914) ENGINE COOLANT TEMPERATURE SENSOR RETURN CIRCUIT

Fig 2: Engine Coolant Temperature Sensor Connector Pin ID
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (K2) ECT Sensor Signal circuit and the (K914) Sensor Ground circuit at the Coolant Temperature Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K2) ECT Sensor Signal circuit and the (K914) Sensor Ground circuit.
  - Perform POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .