Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC1997SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONBODY CONTROL SYSTEM CIRCUIT DESCRIPTIONRETAINED ACCESSORY POWER (RAP)
1997 Cadillac Seville SLS V8-4.6L VIN Y
Retained Accessory Power (RAP)
1997 Cadillac Seville SLS V8-4.6L VIN YSECTION Retained Accessory Power (RAP)
The RAP feature allows the power windows, the entertainment system, and astroroof to be operated after the ignition switch is turned from "RUN" to the "LOCK" position. These items will be turned off when any vehicle door is opened or ten minutes have elapsed since the ignition switch transition.
The PZM enables RAP by energizing the Controlled Power Relay and the Accessory Time Delay Cutoff Relay, as well as a Class 2 serial data message to the entertainment system. The Controlled Power Relay is energized whenever the PZM is "awake," and for up to 15 minutes after the last "wake-up" signal. The Accessory Time Delay Cutoff Relay directly controls the power windows and sunroof but the PZM must provide a serial data message to the entertainment system to Allow RAP control.
The PZM enables RAP by energizing the Controlled Power Relay and the Accessory Time Delay Cutoff Relay, as well as a Class 2 serial data message to the entertainment system. The Controlled Power Relay is energized whenever the PZM is "awake," and for up to 15 minutes after the last "wake-up" signal. The Accessory Time Delay Cutoff Relay directly controls the power windows and sunroof but the PZM must provide a serial data message to the entertainment system to Allow RAP control.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.