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Diagnostic Test

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  1. DTC IS ACTIVE 
    NOTE: Diagnose any CAN - C Communication DTCs before continuing.
    1. Turn the ignition off.
    2. If possible, allow the vehicle to sit with the ignition off for more than 60 minutes in an environment where the temperature will allow the oil temperature to cool down.
    3. Start the engine and allow it to reach normal operating conditions.
    4. With a scan tool, select View DTCs.

      Is the status Active or Pending for this DTC?

      Yes 

      • Go to step  2

      No 

  2. ENGINE OIL 
    1. The following conditions must be checked:
    • OEM recommended oil viscosity is being used.
    • Customer is following the oil change schedule.
    • Check the engine oil for contamination. (i.e., fuel and/or engine coolant)
    • Internal engine condition that may effect engine temperature.
  3. (G24) EOT SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Checking Engine Oil Temperature Sensor Circuit
    GC0099802Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Engine Oil Temperature Sensor connector.
    3. Disconnect the Powertrain Control Module (PCM) connector.
    4. Turn the ignition on.
    5. Measure the voltage of the (G24) EOT Signal circuit in the Engine Oil Temperature Sensor harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  4
  4. (G24) EOT SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 2: Checking Engine Oil Temperature Sensor Circuit
    GC0099803Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Measure the resistance between ground and the (G24) EOT Signal circuit in the Engine Oil Temperature Sensor harness connector.

      Is the resistance above 100 Ohms?

      Yes 

      • Go to step  5

      No 

  5. (G24) EOT SIGNAL CIRCUIT SHORTED TO THE (K915) SENSOR GROUND CIRCUIT 
    Fig 3: Checking Engine Oil Temperature Sensor Circuit
    GC0099804Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (G24) EOT Signal circuit and the (K915) Sensor Ground circuit in the Engine Oil Temperature Sensor harness connector.

      Is the resistance above 100 Ohms?

      Yes 

      • Go to step  6

      No 

  6. (G24) EOT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Checking Engine Oil Temperature Sensor Circuit
    GC0099805Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (G24) EOT Signal circuit between the Engine Oil Temperature Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  7

      No 

  7. (K915) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 5: Checking Engine Oil Temperature Sensor Circuit
    GC0099806Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K915) Sensor Ground circuit between the Engine Oil Temperature Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  8

      No 

  8. ENGINE OIL TEMPERATURE SENSOR SIGNAL VOLTAGE 
    Fig 6: Checking Engine Oil Temperature Sensor Circuit
    GC0099807Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Connect the Powertrain Control Module (PCM) harness connector.
    3. Connect a jumper wire between the (K915) Sensor Ground circuit and the (G24) EOT Signal circuit in the Engine Oil Temperature Sensor harness connector.
    4. Turn the ignition on.
    5. With the scan tool, read the Engine Oil Temperature Sensor signal voltage.

      Is the voltage below 1.0 volt with the jumper wire in place?

      Yes 

      • Go to step  9

      No 

      • Go to step  10
  9. ENGINE OIL TEMPERATURE SENSOR 
    1. Turn the ignition off.
    2. Inspect the wiring and connectors between the Engine Oil Temperature Sensor and the Powertrain Control Module (PCM).
    3. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.

      Were any problems found?

      Yes 

      No 

  10. 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.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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