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Home >> Jeep >> 2009 >> Grand Cherokee Laredo, 3.0 M, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P2239 To U0415 - Diesel >> U0141-Lost Communication With Front Control Module >> Diagnostic Test

Diagnostic Test

  1. DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, Clear DTCs in the Engine Control Module (ECM).
    3. Monitor the scan tool for at least two minutes.
    4. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
    5. Start the engine.
    6. Allow the engine to reach normal operating temperature.
    7. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      No