Accessory Delay Module: Description and Operation

The Body Control Module (BCM) controls the Retained Accessory Power (RAP) feature. This feature allows the operation of the radio, power windows, and power sunroof (if equipped) for 10 minutes (or until a vehicle door opens) after the ignition switch has been turned from the RUN or ACC to the LOCK or OFF position.

The BCM interfaces with the vehicle's power distribution through the RAP relay. The RAP relay allows the BCM to control the application of power to circuit 75, which in turn provides power to these circuits:
^ Circuit 43 - Radio.
^ Circuit 143 - Power windows, and power sunroof (if equipped).

When the ignition switch is in either the ACC or the RUN position, the BCM energizes the RAP relay by grounding circuit 707.

The BCM turns off the RAP relay when the ignition switch is in the START position, thus disabling the RAP feature during engine crank and bulb test.

When the ignition switch is turned from the RUN or ACC to the LOCK or OFF position with all vehicle doors closed, the BCM leaves the RAP relay energized for 10 minutes, or until any vehicle door opens (the BCM detects a ground signal in circuit 49 or 727).

The BCM resets the RAP timer when the ignition switch is turned from the LOCK or OFF position to the ACC or RUN position.

Diagnostic Trouble Codes (DTCs)
The BCM may set these DTCs related to the RAP:
^ B0702 - RAP relay circuit shorted to ground or open.
^ B0703 - RAP relay circuit shorted to voltage.

Refer to Body Control Module (BCM) for diagnostic procedures regarding these DTCs. Testing and Inspection