Front and rear interior lights, footwell lights and cargo area light
The CJB controls these lamps by supplying voltage to both sides of each lamp. By increasing or decreasing the voltage applied to one side of the lamp, the CJB controls the amount of current passing through the lamp and thus the light level. This function is controlled by the interior lighting FET (FET), which is built into the CJB and allows the CJB to smoothly increase and decrease the light levels of the lights as needed. CJB controls the duration of the increase in the range of up to 1.3 seconds, and the duration of the decrease to 2.6 seconds.
If the vehicle is involved in a collision severe enough to deploy the assist restraint system (SRS), restraint system control module (RCM) sends a 250 Hz 'collision' signal to the CJB. Upon receiving this signal, the CJB turns on the front and rear interior lights, footwell lights, and cargo area light for 30 minutes. The CJB turns off the interior lights before the 30 minute period has elapsed if the collision signal from the RCM is replaced by a 'normal' 10 Hz signal.
Illuminated vanity mirrors and glove compartments
The vanity mirror lights and glove compartments are powered by the CJB. When the vanity mirror illumination operation is selected by pressing the corresponding switch, a ground circuit is created, causing the lamps to light up. The illumination of the vanity mirrors is controlled by a microswitch, which is integrated with the lamp assembly. When the glove box is opened, the switch contacts close to ground the light.
Door and mirror lights
The operation of the door lights and mirrors is controlled by the door modules together with the CJB. The CJB provides power to the latch switch for each door. When a door is opened, the switch contacts close, providing power to the corresponding door module. Upon receiving this power, the module turns on the light on that door, providing power and ground.
The driver and front passenger door modules also control the operation of the mirror lights. When a valid request is received from the RF receiver, the CJB notifies the driver and front passenger door modules using the medium speed CAN bus. When a message is received on the CAN bus, the door module turns on the lamp of the corresponding mirror, providing ground and power.
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