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Home >> Buick >> 2003 >> Century Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System Testing & Engine Component Tests - 3.1L >> Fuel Systems >> Fuel Injector Circuit Diagnosis >> Test Description

Test Description

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

  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 between the multi-way harness connector and the fuel injectors.
  4. 7  - This step tests for an open or high resistance between the multi-way harness connector and the fuel injectors.
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