The Body Control Module (BCM) controls the interior illumination. Refer to Body Control System Description in Body Control System for more information regarding the BCM.

The BCM may set these Diagnostic Trouble Codes (DTCs) related to the interior courtesy lamps:

Refer to Body Control Module Diagnostic Information in Body Control System for diagnostic procedures regarding these DTCs.

The Body Control Module (BCM) controls the interior illumination. The BCM turns on the roof rail courtesy/reading lamps and the inside rear view mirror lamps when:

The BCM turns off the lamps when all doors are closed and the I/P lamp dimmer switch is off.

All vehicle doors contain a door lock ajar switch. When the driver's door is open, the LF door lock ajar switch closes and sends a ground signal to the BCM through circuit 49. When one of the LF, RF, LR or RR door is open, its corresponding door lock ajar switch closes and sends a ground signal to the BCM through circuit 727. The LF and RF door locks have a door handle switch. When either LF or RF exterior door handle is lifted, its corresponding door lock switch sends a ground signal to the BCM though circuit 394. The BCM grounds circuit 157 when detecting a ground signal in circuits 49, 394 or 727.

When the driver's door is closed, the LF door lock ajar switch opens circuit 49. When the LF, RF, LR and RR doors are closed, their corresponding door lock ajar switches open circuit 727. When LF and RF door handles are released, circuit 394 opens. The BCM then opens circuit 157 when circuit 49, 394 and 727 are open.

The BCM uses the voltage in circuit 240 to power the courtesy lights through circuit 1732. The BCM controls the power supplied in circuit 1732 for inadvertent load (battery rundown) protection. The BCM open circuit 157 when the inadvertent load (battery rundown) protection is active (circuit 1732 is open).

The BCM grounds circuits 156 and 157 for 22-28 seconds, turning on the courtesy lamps, when the following conditions are met:

The delayed illumination feature is canceled when turning the ignition switch to the accessory or on position, or by locking the doors when using either a power door lock switch or a keyless entry transmitter.

The BCM grounds circuits 156 and 157 for 22-28 seconds, turning on the courtesy lamps, when the following conditions are met:

The exit illumination is canceled when:

The BCM dims the courtesy lights slowly from full brightness to off in 3 seconds. This feature starts anytime the BCM is turning off the courtesy lights.

Theater dimming does not work when turning the I/P lamp dimmer switch from the DOME position to off, or by locking the doors with a power door lock switch.

In addition, theater dimming does not work when the exit illumination feature is cancelled.

The BCM grounds circuits 156 and 157 for 36-44 seconds, turning on the courtesy lamps, when the following conditions are met:

The BCM has a feature called inadvertent load (battery rundown) protection. The BCM de-energizes circuit 1732 18-22 minutes after the ignition switch has been turned form the accessory or on position to the off position.

The BCM restores power to circuit 1732 when:

Important: The inadvertent battery power rundown protection feature is mileage-sensitive. The vehicles with less than 15 (+/- 1.5) total driven miles have a three minute (+/- 18 seconds) time-out instead of ten minutes.

The operation of these lamps is described as part of the courtesy lights operation. The BCM provides power (circuit 1732) and ground (circuit 157) to these lamps, controlling their operation.

In addition, these lamps have switches that allow the operator to turn them on when the courtesy lamps are off. The switches obtain ground through circuit 850. Power to these lamps is provided by the BCM through circuit 1732, so that they are protected by the inadvertent load (battery rundown) protection in case they are left on.

The operation of these lamps is described as part of the courtesy lights operation. The BCM provides power (circuit 1732) and ground (circuit 157) to these lamps, controlling their operation.

In addition, these lamps have switches that allow the operator to turn them on. The switches, when on, provide ground to these lamps, turning them on. The switches obtain ground through circuit 850. Power to these lamps is provided by the BCM through circuit 1732, so that they are protected by the inadvertent load (battery rundown) protection in case they are left on.

The operation of these lamps is described as part of the courtesy lamps operation. The BCM provides power (circuit 1732) and ground (circuit 156) to these lamps, controlling their operation.

The I/P lamp dimmer switch allows the operator to turn on the courtesy lamps from inside the vehicle. When the I/P lamp dimmer switch is in the DOME position, the switch sends a ground signal to the BCM through circuit 1495. This action causes the BCM to turn on the courtesy lamps. When the I/P lamp dimmer switch is off, the BCM turns off the courtesy lamps. The I/P lamp switch is protected by the inadvertent load (battery rundown) protection in case the I/P lamp dimmer switch is left in the DOME position with the ignition switch off.

The sunshade mirror lamps turn on when opening its mirror cover. The sunshade mirror has a switch that closes (providing ground to the lamps) when the mirror cover is open, and the switch opens when the cover is closed. The switch receives ground through circuit 850.

Power to the sunshade mirror lamps is provided by the BCM through circuit 1732, so that they are protected by the inadvertent load (battery rundown) protection in case that a mirror cover is left open.

The I/P compartment lamp turns on when the I/P compartment is open. The I/P compartment lamp has a switch that closes (providing ground to the lamp) when the I/P compartment is open, and the switch opens when the I/P compartment is closed. The I/P compartment lamp switch receives voltage through circuit 1732 and ground through circuit 1450. The I/P compartment lamp is protected by the inadvertent load (battery rundown) protection in case that the I/P compartment is left open.

The rear compartment courtesy lamp turns on when the rear compartment lid is open. The rear compartment lamp uses a rear compartment lid ajar indicator switch. This switch closes (providing ground to the lamp) when the rear compartment lid is closed. The rear compartment lamp receives voltage through circuit 1732. The rear compartment lid ajar indicator switch receivers ground through circuit 350. The rear compartment courtesy lamp is protected by the inadvertent load (battery rundown) protection in case that the rear compartment lid is left open.