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Home >> Mitsubishi >> 1993 >> Precis Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> Code 41: Fuel Injector Failure >> Harness Inspection
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Harness Inspection

  1. Measure injector power supply voltage. Disconnect injector harness connectors. Turn ignition on. Using DVOM, measure voltage at each injector harness connector terminal No. 2 (Green/White wire). If voltage measured is less than battery voltage, inspect and repair circuit(s) as needed.
  2. Check continuity of injector ground circuit. Disconnect ECM harness connector. Ensure ignition is off. Connect a jumper wire between each injector ECM terminal and ground. Disconnect injector harness connectors. Using ohmmeter, check continuity between each injector terminal and vehicle ground. See FUEL INJECTOR GROUND CIRCUIT ID  table for ECM terminal numbers and wire colors.
    FUEL INJECTOR GROUND CIRCUIT ID

    Injector Number Wire Color Corresponding (1) ECM Terminal No.
    Federal
    1 Yellow 9
    2 Yellow/Black 8
    3 Lt. Green 18
    4 Lt. Green/White 17
    California
    1 Yellow 13
    2 Yellow/Black 26
    3 Green/Black 12
    4 Lt. Green/White 25
    (1) Use 18-pin connector on Federal models. On California models use 26-pin connector. See Figure and Figure for terminal identification.
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