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Home >> Chevrolet >> 2002 >> Blazer 2D Utility, 4WD, Automatic, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P0650: Mil Control Circuit >> Test Description
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Test Description

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

  1. 5

    This step tests for a short to ground in the MIL control circuit. With the PCM disconnected and the ignition ON the MIL should be OFF.

  2. 6

    This step tests for a short to voltage on the MIL control circuit. With the fuse removed there should be no voltage on the MIL control circuit.

  3. 17

    This vehicle is equipped with a PCM that utilizes an electrically erasable programmable read only memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.

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