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 MANUALSPONTIAC1998FIREBIRD V8-5.7L VIN GREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONWAKE-UP AND SLEEP MODES
1998 Pontiac Firebird V8-5.7L VIN G
Wake-Up and Sleep Modes
1998 Pontiac Firebird V8-5.7L VIN GSECTION Wake-Up and Sleep Modes
Wake-up signals are signals which turn on the BCM. Once active, the BCM begins monitoring and controlling the system functions listed above. With the ignition switch in the OFF position the BCM ceases control of the system functions after a 10 minute period. This is the sleep mode. During the sleep mode the BCM monitors several circuits for changes in status. The BCM wakes up when a change is detected in any of the following inputs:
^ Courtesy lamps
^ Remote keyless entry
^ Ignition switch
^ Park lamps
^ Headlamps
^ Front side door locks or door jamb switches
^ Rear compartment lid ajar indication switch
^ Ignition key lock cylinder
^ Shock sensor
^ Courtesy lamps
^ Remote keyless entry
^ Ignition switch
^ Park lamps
^ Headlamps
^ Front side door locks or door jamb switches
^ Rear compartment lid ajar indication switch
^ Ignition key lock cylinder
^ Shock sensor
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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.