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Home › Jeep › 2007 › Commander Base, 4.7 N, AWD › Repair and Diagnosis › Engine Performance › System › DTCS P2127 To P2610 › P2610-Pcm Internal Shutdown Timer Rationality Too Fast › Diagnostic Test

Diagnostic Test

  1. 1) ACTIVE DTC 
    NOTE: Diagnose and repair any other DTCs set in the PCM before proceeding with this test.

    Turn the ignition on.

    With the scan tool, Clear DTCs in the Powertrain Control Module (PCM).

    Start the engine and allow it to reach operating temperature.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    With the scan tool, select View DTCs.

    Is the DTC Active at this time? 

    Yes 

    1. Go to  2).

    No 

    1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
  2. 2) PCM IGNITION CIRCUITS 
    Fig 1: Checking PCM Fused Ignition Switch Circuits
    GC0003020Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the C1 PCM harness connector.

    CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

    With a 12-volt test light connected to ground and with special tool #8815 installed, probe the (F1), (F26), and (F942) Fused Ignition Switch circuits.

    Perform the above check with the Ignition key in the off lock position, Ignition on, engine not running position, and during cranking.

    Wiggle the related wire harness while probing the special tool with the test light to try to interrupt the circuit.

    Does the test light illuminate brightly? 

    Yes 

    1. Go to  3).

    No 

    1. Repair the open or excessive resistance in the (F1), (F26), and (F942) Fused Ignition Switch (Off, Run, Start) circuits. Inspect the related fuse, if the fuse is open check the circuits for a short to ground.
    2. Perform POWERTRAIN VERIFICATION TEST .
  3. 3) POWERTRAIN CONTROL MODULE (PCM) 

    Verify that the PCM is operating at the latest software version available.

    Refer to any Technical Service Bulletins that may apply.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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