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Home >> Buick >> 2003 >> LeSabre Custom, 4T65E/M15 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0650: Malfunction Indicator Light Control Circuit >> Test Description
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Test Description

The number below refers to the step number in the diagnostic procedures.

  1. 5

    This step tests for a short to ground in the MIL control circuit. With the Powertrain Control Module (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.
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