LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1611 (5.7L - DTCS P0521 To P1414 - 2500 Hd) >> DTC Troubleshooting >> P1115-General Temperature Rationality >> 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 
    1. Turn the ignition off.
    2. If possible, allow the vehicle to sit with the ignition off for more than 480 minutes in an environment where the temperature is consistent and above -7°C (19.4°F).
    3. Test drive the vehicle. The vehicle must exceed 48 km/h (30 mph) during the test drive. Do not cycle the ignition off when the test drive is completed.
    4. With the scan tool, select View the DTCs.
      NOTE:

      In cold weather, this DTC could be set by a high powered block heater and no repair would be required.

      Is the DTC Active or Pending?

      Yes 

      • Go To  2

      No 

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

      Are there any ECT, Intake Air or Ambient Air Temperature Sensor DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. CHECK THE TEMPERATURE SENSORS FOR PROPER OPERATION 
    1. With the scan tool, read the ECT, Ambient Air Temp and Intake Air Temp Sensor temp values.
    2. Start the engine.
    3. Allow the engine to reach normal operating temperature while monitoring the three Sensor temperature values.

      Is the temperature for each of the Sensors increasing properly?

      Yes 

      No 

      • Go To  4
  4. CHECK THE TEMPERATURE SENSOR FOR PROPER OPERATION 
    1. Disconnect the suspected sensor.
    2. Turn the ignition ON.
    3. With the scan tool, read the voltage of the suspected Sensor.
    4. Connect a jumper wire between the Sensor Signal circuit and the Sensor ground circuit of the ECT Sensor, IAT Sensor and AAT Sensor.

      Did the voltage reading start at 4.8 to 5.0 Volts and decrease to 0 Volts when the jumper wire was installed?

      Yes 

      No 

      • Go To  5
        • NOTE:

        Remove the jumper wire before continuing.

  5. CHECK THE TEMPERATURE SENSOR SIGNAL CIRCUIT FOR EXCESSIVE RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Disconnect the BCM E harness connector.
    4. Measure the resistance of the Sensor Signal circuit from the Sensor harness connector to the appropriate terminal of PCM C2 harness connector for the ECT Sensor and IAT Sensor.
    5. Measure the resistance of the (G31) AAT Sensor Signal circuit from the Sensor harness connector to the BCM E harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the excessive resistance in the Temperature Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE SENSOR GROUND CIRCUIT FOR EXCESSIVE RESISTANCE 
    1. Measure the resistance of the (K900) Sensor ground circuit from the ECT Sensor and IAT Sensor to the appropriate terminal of PCM harness
    2. Measure the resistance of the (G931) Sensor ground circuit from the AAT Sensor harness connector to the BCM E harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the excessive resistance in the Sensor ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  7
  7. CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance between ground and the Sensor Signal circuit at the Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8
  8. CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO THE SENSOR GROUND CIRCUIT 
    1. Measure the resistance between Sensor Ground and the Sensor Signal circuit at the Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short between the Sensor ground circuit and the Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  9
  9. CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition on.
    2. Measure the voltage on the Sensor Signal circuit at the Sensor harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  10
  10. 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 .
scientia non olet · About LEMON Manuals