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.
The body control module monitors the ignition switch position, battery
condition and passenger compartment door status to determine whether RAP should
be initiated. If the ignition switch transitions from RUN/ON to OFF,
the battery level is within the acceptable range and the passenger
compartment doors are closed, the body control module closes the RAP
relay. This provides power for the following:
The body control module turns OFF the RAP function and opens the RAP
relay when one of the following conditions are met:
| • | The body control module senses the opening of any door (and the
liftgate on utility vehicles, if equipped) in the passenger compartment |
| • | The body control module detects a decrease in battery capacity
below a prescribed limit |
| • | The body control module receives a message from its internal timer
indicating the end of the RAP period after 20 minutes. |
| • | The transition from OFF to RUN/ON or ACC of the ignition
switch |
