Serial Data Control of Retained Accessory Power (RAP)
The class 2 modules receive the power mode message from the body control
module (BCM) over the serial data circuits, indicating when the retained accessory
power (RAP) power mode is current. The BCM monitors the ignition switch position,
battery condition and passenger compartment doors status to determine whether RAP
should be initiated. The modules then support the operation of the systems under
their control as required by their RAP power mode operation.
RAP will end when one of the following conditions is met:
| • | The BCM receives an input indicating the opening of any compartment door. |
| • | The BCM internal timer for the RAP expires after approximately 10 minutes. |
| • | The BCM detects a decrease in battery capacity below a prescribed limit. |
The BCM then sends a serial data power mode message Off-Awake ending the RAP
function.
The class 2 RAP functions are:
| • | The entertainment devices |
BCM/Relay Control of Retained Accessory Power (RAP)
The BCM keeps the RAP relay energized during all power modes,
except Off-Awake.
The devices powered through the RAP relay or controlled directly by BCM are:
The devices controlled by the BCM through the RAP supply voltage circuit are:
| • | The power roof module (PRM) |
