FUNCTION OF MAIN COMPONENTS
|Main Body ECU (Multiplex Network Body ECU)||Receives various signals and illuminates the headlights, taillights, clearance lights, rear side marker lights and license plate lights.|
|Automatic Light Control Sensor||Detects the ambient light level.|
|Headlight Dimmer Switch Assembly||Outputs a light control signal to the main body ECU (multiplex network body ECU).|
|Headlight ECU Sub-assembly LH/RH||Supplies power to the headlights.|
Instrument Panel Junction Block Assembly
|Supplies power to the taillights, rear side marker lights and license plate lights.|
|Front Door Courtesy Light Switch Assembly (LH*1/RH*2)||Detects whether a door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).|
*1: LHD models
*2: RHD models
The automatic light control system operates as follows:
|Headlights and Taillights turn on||
When all of the following conditions are met, the headlights, taillights, clearance and rear side marker lights, and license plate lights automatically turn on:
|Headlights and Taillights turn off||When the ambient light is bright, the exterior lights automatically turn off.|
When the main body ECU (multiplex network body ECU) detects a malfunction in the automatic light control system, Diagnostic Trouble Codes (DTCs) are stored in memory.
The DTCs can be read using the Global TechStream (GTS). For details, refer to the Repair Manual.