GM Service Manual Online
For 1990-2009 cars only

The retained accessory power (RAP) system is a subsystem of the body control module (BCM). The RAP system provides the following features:

    • Convenience
    • Increased security

The RAP system applies battery voltage through circuit 75 to the following components:

    • The radio fuse 17
    • The windows circuit breaker

The RAP system allows operation of the following components with the ignition switch in the OFF position:

    • The power folding top
    • The radio
    • The power windows
    • The rear fog lamps (Export)

The RAP system allows operation of the above components for approximately 10 minutes after the ignition switch is turned to the OFF position. Operation is interrupted before the end of 10 minutes if a door is opened.

The BCM also allows the operation of the door locks and the rear compartment lid release with the ignition switch in the OFF position. This is true in the following situations:

    • The rear compartment lid release is operated from the remote control door lock transmitter.
    • Either door is opened.
    • Less than 35 seconds have passed since both doors were closed. After 35 seconds, the doors will lock once but not unlock.

If the universal theft deterrent system (UTD) is armed within 35 seconds of the doors closing, the unlock command is disabled. All of the components in these circuits are enabled as long as the ignition switch is in one of the following positions:

    • ACCY
    • RUN

All of the components in these circuits are enabled for approximately 10 minutes when the following conditions exist:

    • The ignition switch is in the OFF position.
    • Both of the doors are closed.

If either of the doors opens, the 10 minute timer is canceled. The door locks will remain enabled for as long as the door is open. The door locks will not operate with the door open if both of the following conditions exist:

    • The key is in the ignition.
    • The lockout prevention feature is enabled.

For more information, refer to Power Door Locks Circuit Description .