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 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 receives an input as a serial data message from the door
modules 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 ignition switch transitions from OFF to RUN/ON or ACC. |
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:
• | Cellular telephone module w/UV8 |
• | Memory seat module (MSM) w/A45 |
• | Navigation display head w/UY4 |
• | Navigation data processor w/UY4 |
• | Rear integration module (RIM) |
• | Steering column module w/N37 |
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 is in the RAP function as described above, it closes the
RAP relay. This provides power during the RAP period for the following modules:
• | Sunroof control module w/CF5 |
• | Rear window sunshade module w/DE1 |
The RIM opens the RAP relay to end the RAP function when
it ends the RAP function as outlined previously.