Chevrolet Workshop Manuals
Express 3/4 Ton Van V8-4.8L VIN V (2003)
Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Component Information > Diagrams > Page 91
Accessory Delay Module: Description and Operation
RETAINED ACCESSORY POWER (RAP) DESCRIPTION AND OPERATION
RETAINED ACCESSORY POWER (RAP) POWER MODE
RAP is a power mode that permits the operation of selected customer convenience items for 10 minutes after the ignition switch is turned OFF. RAP
Controls certain body functions.
Sends out a class 2 message via the serial data line, which enables/disables other modules at the beginning/end of RAP power mode.
Some BCM features, such as the interior courtesy lamps will function after the 10 minute RAP time limit has elapsed. This is normal, and does not
The right and left power windows through the WND RAP relay.
Any class 2 module that functions in RAP power mode (that is not hard-wired), is controlled by the BCM via class 2 power mode messages.
RAP is disabled when:
The door is opened.
A low battery voltage is detected by the BCM.
The transition of ignition switch from OFF to ON or ACC.
10 minutes have elapsed after the ignition was turned OFF.
There may be some functions of the vehicle that are hard-wired straight to the battery, these are the exceptions.
The BCM monitors the ignition switch position, battery voltage and passenger compartment door status to determine whether RAP power mode
WND RAP RELAY
The BCM controls the WND RAP relay's coil circuit using high side drive. The output of the relay is used to supply B+ to the Power Windows. The
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