Envoy 2WD V6-4.3L VIN W (1998)
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The interior lamps switch is turned ON.
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The lift glass is opened or closed.
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The courtesy lamp is activated.
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The dome lamp is activated.
Interior Illumination
The interior lights will illuminate continuously if the following occurs:
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The interior light defeat button is OFF and any door or the lift glass is opened.
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The dimmer switch is rotated to the ON position for interior illumination.
Lift Glass Release Function
The lift glass release switch is an input to the BCM.
The BCM will command the lift glass to release if one of the following conditions exists:
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The vehicle is in PARK/NEUTRAL.
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The park brake conditions are met.
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The lift glass release switch is pressed.
When the BCM receives a message to activate the lift glass release solenoid from the RFA module, the BCM energizes the lift glass release relay if one
of the following conditions exists:
^
The vehicle is in PARK/NEUTRAL.
^
The park brake conditions are met
Lighting Control
EXTERIOR LIGHTING CONTROL
The BCM can turn ON some of the exterior lighting independently of the exterior lighting system. The vehicle lighting system controls the same
lighting components. The following list indicates which exterior lighting components the BCM can turn ON:
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The low beams and park lamps
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The high beams
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The daytime running lamps
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The front fog lamps
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The rear fog lamps (export only)
INTERIOR LIGHTING CONTROL
The BCM can turn ON some of the interior lighting independently of the interior lighting system. The vehicle lighting system controls the same
lighting components. The BCM controls the following interior lamps:
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The courtesy lamps
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The illuminated entry control of the courtesy lamps
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The vanity lamp is activated.
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The courtesy lamp is activated.
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The dome lamps
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The glove compartment lamp
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The reading lamps
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The inside rearview mirror lamps The courtesy lamps are enabled by the following inputs:
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Discrete input to the BCM from the following components:
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The door jamb switches
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The door handle
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The dome lamp
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RFA transmitter activation (function of illuminated entry).
SEGMENT INSPECTION
The IPC illuminates in order to verify that all of the segments of the telltale displays are operating correctly. The turn signal indicators do not turn
ON during this inspection. Do not attempt further diagnosis unless all of the segments appear. Further diagnosis could lead to misdiagnosis. If any
portions or segments of the IPC displays are inoperative, first diagnose the IPC.
Lockout Prevention
The lockout prevention feature is activated when the following actions occurs:
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The key is in the ignition switch.
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Any door is opened.
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The POWER LOCK switch is pressed.
This feature will lock the doors and unlock the driver door.
Passlock System
The Passlock theft deterrent system is designed to prevent vehicle operation if an incorrect ignition key is used to start the vehicle. The ignition key will
allow the lock cylinder to turn. The Passlock sensor, which is located inside of the ignition switch assembly, sends a code to the BCM. If the BCM
receives the correct code from the Passlock sensor, the BCM will send a password to the Vehicle Control Module (VCM) or the Powertrain Control
