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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0201-P0206: Injector Control Circuit >> Test Description
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Test Description

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

  1. 4

    This step tests for voltage at the fuel injector harness connector. The INJR fuse supplies power to the coil side of the fuel injector harness connector. If the fuse is open, a short to ground on the fuel injector ignition voltage circuit is indicated.

  2. 5

    This step verifies that the PCM is able to control the fuel injector. If the test lamp blinks, then the PCM and wiring are okay.

  3. 6

    This step tests if a ground is constantly being applied to the fuel injector.
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