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Home >> Buick >> 2003 >> Regal LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures - 3.8L >> Fuel Systems >> Fuel Injector Circuit Diagnosis >> Test Description
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Test Description

NOTE: Fuel Injector Circuit Diagnosis testing for Bonneville & LeSabre is not available from manufacturer at this time. See FUEL SYSTEM DIAGNOSIS .

The numbers below refer to the step numbers in the diagnostic procedure.

Grand Prix

  1. 4  - This step tests for a short to ground on the fuel injector ignition 1 voltage supply circuit, fuse side.
  2. 5  - This step tests for a short to ground on the fuel injector ignition 1 voltage supply circuit.

Impala, Monte Carlo & Park Avenue

  1. 4  - This step tests for a short to ground on the fuel injector ignition 1 voltage supply circuit.
  2. 5  - This step tests for a short to a PCM ground on the fuel injector ignition 1 voltage supply circuit.
  3. 6  - This step tests for an open ignition 1 voltage supply circuit between the fuel injector fuse and the multi-way harness connector.
  4. 7  - This step tests for an open or high resistance between the multi-way harness connector and the fuel injectors.

Regal

  1. 4  - This step tests for a short to ground on the fuel injector ignition 1 voltage supply circuit.
  2. 5  - This step tests for an open ignition 1 voltage supply circuit between the injector fuse and a fuel injector harness connector.
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