Retained Accessory Power Description and Operation

Retained Accessory Power The Retained Accessory Power (RAP) & Interruptible RAP (IRAP) Circuits are controlled by the K9 Body Control Module (BCM). The BCM is the Power Mode Master, it utilizes various Vehicle inputs to determine the Vehicle Power Mode and sends this information via Serial Data and providing associated electrical signals to the entire vehicle for proper feature operation. The BCM monitors the vehicles power modes, and door ajar/open switch status to determine whether the retained accessory power should be initiated and remain active or be terminated. The RAP output is optional based on the vehicles option contents. When utilized, the RAP Output control can be used to control a RAP Relay, it may provide direct power, or s serial data message to vehicle devices/modules from the BCM. Retained Accessory Power Relay Coil Control Circuit (If Equipped) The BCM keeps the device or relay (if equipped) energized during all power modes, except Off-Awake and Crank. The device(s) remain active for approximately 10 min after the Vehicle is placed into the OFF Power Mode, provided none of the doors are opened. Retained accessory power will end when one of the following conditions are met: The BCM receives an input from any door ajar switch indicating the opening of the door after the OFF Power Mode is achieved.

Note

If the BCM is receives a door open/ajar active signal when the vehicle is placed into the OFF Power Mode, the retained accessory power will not initiate. The BCM internal timer for the retained accessory power expires after approximately 10 min. Systems powered by the retained accessory power control circuit during the retained accessory power mode are as follows:

Note

The vehicle may not be equipped with all components as listed below. 12 V Accessory Power Receptacle Cigarette Lighter Receptacle Window Switches Sunroof Control Module (If Equipped) Sunroof Switch (If Equipped) Mobile Device Wireless Charger Module Mobile Telephone Control Module (If Equipped) Traffic Data Receiver (If Equipped) Transmission Shift Lever Position Indicator (w/floor mounted console gear shift) Serial Data Controlled Retained Accessory Power Retained accessory power systems controlled by serial data are as follows: Radio Radio retained accessory power activation/termination is the same as relay operation with one exception; the only door that will turn the radio off during retained accessory power is the driver door open/ajar switch. The USB Ports will function the same as the radio. Vehicle Communication Interface Module (VCIM) (Onstar®) (If Equipped) VCIM RAP activation/termination is the same as radio operation with 1 exception; if there is an active call and the vehicle is placed in the OFF Power Mode, the VCIM will remain in RAP mode, and keep the radio in RAP mode until the call is terminated. Interruptible Retained Accessory Power The Power Mode Master (PMM) Controls components as needed If equipped with a RAP relay, the BCM controls the Retained Accessory Power with an exception, Interruptible Retained Accessory Power (IRAP) is deactivated during transmitter authentication. During Transmitter Authentication the PMM will deactivate components including IRAP to prevent Radio Frequency (RF) Interference (RFI) that may cause a “NO REMOTE DETECTED” message to be displayed on the drivers information center.

Note

If transmitter Authentication occurs while in Run or Propulsion Modes, it is normal to for IRAP to be interrupted momentarily (i.e. items connected to auxiliary power ports or chargers may momentarily go off then come back on). If a remote transmitter was not been previously detected, Transmitter Authentication can occurs under any of the following conditions: The drivers side front door is opened. The drivers side rear door is opened. The S38 Vehicle On/Off Switch is pressed.