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 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 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 cellular telephone module w/UV8 |
| • | The digital radio receiver w/U2K |
| • | The memory seat module (MSM) w/A45 |
| • | The rear integration module (RIM) |
| • | The steering column module w/N37 |
| • | The vehicle communication interface module (VCIM) w/UE1 |
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:
| • | The sunroof control module w/CF5 |
| • | The 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.
