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.

ACTIVE DTC
1. Turn the ignition on.
  NOTE:
  Diagnose and repair any system voltage DTCs before continuing with this test.
2. With the scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
ENGINE OIL TEMPERATURE SENSOR
1. Turn the ignition off.
2. Disconnect the Engine Oil Temp Sensor harness connector.
3. Ignition on, engine not running.
4. With the scan tool, read Engine Oil Temp voltage.
  NOTE:
  The sensor voltage should be approximately 5.0 volts (plus or minus .1 volts) with the connector disconnected.
  
  Does the scan tool display the voltage as described above?
  
  Yes
  - Verify that there is good pin to terminal contact in the Engine Oil Temperature Sensor and Powertrain Control Module connectors. Replace the Engine Oil Temperature Sensor if no problems were found with the connectors. Refer to SENSOR, OIL TEMPERATURE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR THE (G24) ENGINE OIL TEMP SIGNAL CIRCUIT SHORTED TO THE (K915) SENSOR GROUND CIRCUIT

Fig 1: Checking Engine Oil Temp Signal Circuit For Short To Sensor Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect PCM C2 harness connector.
3. Measure the resistance between the (K915) Sensor ground circuit and the (G24) Engine Oil Temp Signal circuit in the Engine Oil Temp Sensor harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the short to between the (K915) Sensor ground circuit and the (G24) Engine Oil Temp Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (G24) ENGINE OIL TEMP SIGNAL CIRCUIT FOR A SHORT GROUND

Fig 2: Checking Engine Oil Temp Signal Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (G24) Engine Oil Temp Signal circuit in the Engine Oil Temp Sensor harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the (G24) Engine Oil Temp Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Engine Oil Temperature Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL . Refer to PCM/ECM REPROGRAMMING - GAS .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .