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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 127 (Engine Controls - System & Component Testing) >> Fuel System (Gasoline) >> Fuel Injector Coil Test (3.4L) >> Test Description
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Test Description

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to step numbers in diagnostic procedure.

  1. 3

    This step tests each fuel injector resistance within a specific temperature range. If any fuel injectors display a resistance outside of specified value, replace fuel injector.

  2. 4

    This step determines if all fuel injectors are within 3 ohms of each other. If highest resistance value is within 3 ohms of lowest resistance value, then all fuel injector coil windings are okay.

  3. 5

    This step determines which fuel injector is faulty. After subtracting highest and lowest resistance values from average value, replace fuel injector that has greatest resistance difference from average.

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