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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 Circuit Diagnosis (4.3L) >> 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. 4

    This step tests for a short to ground on Ignition 1 Voltage Supply circuit of fuel injector.

  2. 5

    This step tests for a short to a PCM ground on Ignition 1 Voltage Supply circuit of fuel injector.

  3. 6

    This step tests for an open Ignition 1 Voltage Supply circuit between ECM 1 fuse and multi-way connector.

  4. 7

    This step tests for high resistance between ECM 1 fuse and multi-way connector.

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