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Home >> GMC >> 2002 >> Yukon Base, 4.8 V, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Gasoline) >> Fuel Injector Circuit Diagnosis (4.3L) >> Test Description
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Test Description

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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