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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS U1411 To U1418, System Checks, Engine Cranks But No Start, Symptom Tests >> U1411-Implausible Fuel Volume Signal Received >> Diagnostic Test

Diagnostic Test

  1. 1) ACTIVE DTC 

    Ignition on, engine not running.

    With a scan tool, view DTCs.

    Is the DTC Active at this time? 

    Yes 

    1. Go to  2).

    No 

    1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
  2. 2) CAN B BUS HARDWARE DTCS ALSO ACTIVE 

    With a scan tool check for DTCs in the FCM.

    Are any CAN B Hardware related DTCs active at this time? 

    Yes 

    1. Refer to DIAGNOSIS AND TESTING for the appropriate diagnostic procedures.

    No 

    1. Replace and program the Powertrain Control Module per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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