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 driver door module (DDM) |
| • | The front passenger door module (FPDM) |
| • | The left rear door module (LRDM) |
| • | 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 RIM deactivates the RAP relay to end the RAP function when it
ends the RAP function as outlined in the previous text.
