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) module over the serial data circuits. The DIM module monitors
the ignition switch position, battery condition and passenger compartment
door status to determine whether RAP should be initiated. The DIM module
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 module receives an input as a serial data message from
the driver door module (DDM) indicating the opening of a passenger compartment
door. |
| • | The DIM module receives a message from its internal timer indicating
the end of the RAP period after 10 minutes. |
| • | The DIM module 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 rear integration module (RIM) |
| • | The vehicle communication interface module (VCIM)-Generation
F1 |
| • | The vehicle interface unit (VIU)-Generation 2.6 |
Relay 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.
When the RIM module is in the RAP function as described above, it closes
the RAP relay. This provides power during the RAP period for the components
supplied by the RAP relay.
The RIM module opens the RAP relay to end the RAP function when it
ends the RAP function as outlined in the previous text.
