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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (Engine Controls - 5.7L - Diagnosis (DTC P0601- P2135)) >> Engine Controls Diagnosis >> DTC P0650 >> Circuit Description

Circuit Description

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The malfunction indicator lamp (MIL) is located on the instrument panel cluster (IPC). The MIL informs the driver that an Emission System fault has occurred and that the Engine Control System requires service. The powertrain control module (PCM) monitors the MIL control circuit for conditions that are incorrect for the commanded state of the MIL. For example, a failure condition exists if the PCM detects low voltage when the MIL is commanded OFF, or high voltage when the MIL is commanded ON. If the PCM detects an improper circuit condition on the MIL control circuit, DTC P0650 will set.

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