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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1611 (5.7L - DTCS P0521 To P1414 - 2500 Hd) >> DTC Troubleshooting >> P1239-Engine Oil Temperature Too Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    Diagnose any 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 the scan tool, select View DTCs and record them on the repair order.

      Is the status Active or Pending for this DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any CAN C Communication DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. CHECK THE ENGINE OIL FOR PROPER CONDITION 
    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 oil pressure.

      Were any of the above conditions found?

      Yes 

      No 

      • Go To  4
  4. CHECK THE ENGINE OIL TEMPERATURE SENSOR FOR PROPER VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Engine Oil Temperature Sensor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read the Engine Oil Temperature Sensor voltage.
      NOTE:

      The sensor voltage should be approximately 5.0 Volts (plus or minus.1 Volt) with the connector disconnected.

      Does the scan tool display the voltage as described above?

      Yes 

      • Go To  5

      No 

      • Go To  6
  5. CHECK THE ENGINE OIL TEMPERATURE SENSOR FOR PROPER OPERATION 
    1. Turn the ignition off.
    2. Connect a jumper wire between the (G24) EOT Signal circuit and the (K915) Sensor Ground circuit in the Engine Oil Temperature Sensor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read the Engine Oil Temperature Sensor voltage.
      NOTE:

      The sensor voltage should be approximately 0.0 Volts (plus or minus.1 Volt) with the jumper wire in place.

      Does the scan tool display the voltage as described above?

      Yes 

      No 

      • Go To  6
  6. CHECK THE (G24) EOT SIGNAL CIRCUIT FOR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (G24) EOT Signal circuit between the Engine Oil Temperature Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (G24) EOT Signal circuit for high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE (K915) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE 
    1. Measure the resistance of the (K915) Sensor Ground circuit between the Engine Oil Temperature Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (K915) Sensor Ground circuit for high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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