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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (6.7L Diesel - DTCS - P0008 To P040C - 3500 Cab & Chassis) >> Diagnosis and Testing >> P0112-Intake Air Temperature Sensor 1 Circuit Low >> Testing >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. 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 POWERTRAIN VERIFICATION TEST - 6.7L .
  3. CHECK THE (K21) INTAKE MANIFOLD TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 1: Intake Manifold Temperature Sensor Connector Pin ID
    GC0110842Courtesy of CHRYSLER LLC
    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 POWERTRAIN VERIFICATION TEST - 6.7L .

      No 

      • Go To  4.
  4. CHECK FOR THE (K21) INTAKE MANIFOLD TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K914) SENSOR GROUND CIRCUIT 
    Fig 2: Intake Manifold Temperature Sensor Connector Pin ID
    GC0110843Courtesy of CHRYSLER LLC
    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 POWERTRAIN VERIFICATION TEST - 6.7L .

      No 

      • Replace the Powertrain Control Module in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
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