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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 433 (6.7L Diesel - DTCS P0008 To P040D - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0112-Intake Air Temperature Sensor 1 Circuit Low >> Diagnostic Test

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.
  1. 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 

  2. CHECK THE INTAKE MANIFOLD TEMPERATURE SENSOR 
    1. Turn the ignition off.
    2. Disconnect the Intake Manifold Temperature Sensor harness connector.
      NOTE:

      Check connectors - Clean/repair as necessary.

    3. Measure the resistance across the Intake Manifold Temperature Sensor.

      Is the resistance between 300 and 90k Ohms?

      Yes 

      • Go To  3

      No 

      • Replace the Intake Manifold Temperature Sensor in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  3. CHECK THE (K21) INTAKE MANIFOLD TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Disconnect the PCM C1 harness connector.
      NOTE:

      Check connectors - Clean/repair as necessary.

    2. Measure the resistance between ground and the (K21) Intake Manifold Temperature Sensor Signal circuit at the Intake Manifold Temperature Sensor harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the (K21) Intake Manifold Temperature Sensor Signal circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK FOR THE (K21) INTAKE MANIFOLD TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K914) SENSOR GROUND CIRCUIT 
    1. Measure the resistance between the (K21) Intake Manifold Temperature Sensor Signal circuit and the (K914) Intake Manifold Temperature Sensor Ground circuit at the Intake Manifold Temperature Sensor harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short between the (K21) Intake Manifold Temperature Sensor Signal circuit and the (K914) Intake Manifold Temperature Sensor Ground circuit.
      • Perform the 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 .
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