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 DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONBODY CONTROL SYSTEM CIRCUIT DESCRIPTIONCONTROLLED POWER
1997 Cadillac Seville SLS V8-4.6L VIN Y
Controlled Power
1997 Cadillac Seville SLS V8-4.6L VIN YSECTION Controlled Power
Components under controlled power are supplied power through the controlled power relay. The PZM does not control the high power control output. Rather, the output is grounded whenever the PZM is awake and for 15 minutes after the ignition switch is turned to the "LOCK" position. The following components are under Controlled Power:
^ Instrument Panel Cluster (IPC)
^ Radio
^ Amplifier/Radio Interface Module (RIM)
^ Cellular Phone (PHN)
^ High Beam Relay
^ Fuel Door Release Relay
^ Trunk Release Relay
After the 15 minutes elapse, the modules enter a "sleep" state and receive any necessary power from the low power driver output of the PZM. If the PZM is in Low Power Mode and detects that the current exceeds a certain level (approximately 2.4 amps), the PZM will "wake-up" and enter the High Power Mode. If the vehicle has been left inactive (ignition in the "LOCK" position and no PZM wake-ups) for a period of 3 days, the PZM deactivates the low power driver output.
^ Instrument Panel Cluster (IPC)
^ Radio
^ Amplifier/Radio Interface Module (RIM)
^ Cellular Phone (PHN)
^ High Beam Relay
^ Fuel Door Release Relay
^ Trunk Release Relay
After the 15 minutes elapse, the modules enter a "sleep" state and receive any necessary power from the low power driver output of the PZM. If the PZM is in Low Power Mode and detects that the current exceeds a certain level (approximately 2.4 amps), the PZM will "wake-up" and enter the High Power Mode. If the vehicle has been left inactive (ignition in the "LOCK" position and no PZM wake-ups) for a period of 3 days, the PZM deactivates the low power driver output.
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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.