Retained Accessory Power (RAP) Description and Operation

Accessory Delay Module (RAP) Description and Operation

Serial Data Control of Accessory Delay Module (RAP)

Accessory Delay Module (RAP) is a vehicle power mode that permits the operation of selected customer convenience items after the ignition switch is turned OFF. These selected items will remain in operation until a passenger compartment door is opened or until the RAP function timer reaches its time-out limit.

The modules listed below all receive a RAP message from the body control module (BCM) over the serial data circuits. The BCM monitors the ignition switch position, battery condition and passenger compartment door status to determine whether RAP should be initiated. The BCM then sends a message to the listed modules telling them that they are in RAP power mode. The modules then support the operation of the systems under their control as required by their RAP power mode strategy.

RAP will end when one of the following conditions are met:

* The BCM receives an input (as a hard wired input from the door switches) indicating the opening of a passenger compartment door.
* The BCM receives a message from its internal timer indicating the end of the RAP period after 10 minutes.
* The BCM detects a decrease in battery capacity below a prescribed limit.
* The transition from OFF to RUN/ON or ACC of the ignition switch.

The BCM then sends a serial data message to the listed devices ending the RAP function.

The devices receiving serial data messages for RAP functions are:

* Driver information center (DIC)
* Digital radio receiver (DRR), if equipped
* Head up display (HUD)
* Instrument panel cluster (IPC)
* Radio
* Vehicle communication interface module (VCIM), if equipped

Relay Control of Accessory Delay Module (RAP)

Accessory Delay Module (RAP) is a vehicle power mode that permits the operation of selected customer convenience items after the ignition switch is turned OFF. These selected items will remain in operation until a passenger compartment door is opened or until the RAP function timer reaches its time-out limit.

The body control module (BCM) activates the RAP relay in either the RAP function as described above or if the BCM detects a RUN/ON or accessory power mode. This provides power for the following:

* The power windows
* The sunroof control module, if equipped

The BCM deactivates the RAP relay to end the RAP function when it ends the RAP function as outlined in the previous text.