Serial Data Control of Retained Accessory Power (RAP)
Retained accessory power (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 shut-off limit.
The modules listed below all receive a RAP message from the dash integration
module (DIM) over the serial data circuits. The DIM monitors the ignition
switch position, battery condition and passenger compartment door status
to determine whether RAP should be initiated. The DIM 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 DIM receives an input as a serial data message from any door module
indicating the opening of a passenger compartment door. |
| • | The DIM receives a message from its internal timer indicating the end
of the RAP period after 10 minutes. |
| • | The DIM detects a decrease in battery capacity below a prescribed limit. |
| • | The transition from OFF to RUN/ON or ACC of the ignition switch. |
The DIM module then sends a serial data message to the listed modules ending
the RAP function.
The modules receiving serial data messages for RAP functions are:
| • | The digital radio receiver (DRR) |
| • | The driver door module (DDM) |
| • | The front passenger door module (FPDM) |
| • | The left rear door module (LRDM) |
| • | The radio antenna module |
| • | The rear integration module (RIM) |
| • | The right rear door module (RRDM) |
| • | The vehicle communication Interface module (VCIM) |
Relay Control of Retained Accessory Power (RAP)
When the rear integration module (RIM) is in the RAP function as described
above, it actuates the RAP relay. This provides power during the RAP period for
the sunroof control module w/CF5.
The RAP relay is energized during all power modes, except Off-Awake
