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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1689 (Retained Accessory Power System) >> Diagnostic Information and Procedures >> DTC B1477 >> Circuit Description

Circuit Description

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The retained accessory power (RAP) function allows selected vehicle functions to operate for 20 minutes after the ignition switch is turned OFF. The body control module (BCM) monitors the ignition switch position, the door jamb switches and the voltage on the RAP relay control circuit. The BCM will command the RAP relay ON by grounding the RAP relay control circuit when all the doors are CLOSED and the ignition switch is switched to the OFF position.

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