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System Description
 
 
SYSTEM DIAGRAM
ComponentFunction
IPDM E/R
  • Controls the integrated smart FET, and supplies voltage to the load according with the request from BCM via CAN communication.
  • Transmits the control signal and request (via LIN communication) to the load according with the request from BCM via CAN communication.
BCM
  • Detects each switch condition by the combination switch reading function.
  • Exterior light ON/OFF is judged from each signal, and then a request is transmitted to IPDM E/R (via CAN communication) to turn controls the each lamps.
  • It also transmits a status to the combination meter (via CAN communication) to turns indicator light ON/OFF.
Combination meterTurns the indicator light ON/OFF or displays the indicator according to the status from BCM via CAN communication.
Front door switch (driver side)Detects the front door condition (open or close), and inputs the door switch signal to BCM.
Keyless operation key unitTransmits the door lock request signal to BCM (via CAN communication) from door lock button operation.
ECMECM transmits engine status signal to BCM via CAN communication.
Combination switchLighting & turn signal switchInputs the each switch condition signal to BCM.
 
 
OUTLINE
  • Exterior light battery saver system is controlled by combination switch reading function and exterior light battery saver function of BCM, and smart FET control function of IPDM E/R.
  • BCM turns the exterior light* OFF, according to the vehicle status when ignition switch is turned OFF while exterior light is ON, for preventing battery discharge.
*: Headlight (LO/HI), front fog light, parking light, license plate light, side marker light and tail light
 
 
EXTERIOR LIGHT BATTERY SAVER ACTIVATION
  • BCM turns the exterior lamps OFF (battery saver is activated) when the exterior light ON, engine status is running to stop (ignition switch turned OFF) and any of the following conditions are satisfied.
    • After 60 seconds passed
    • Front door (driver side) is turned from CLOSE to OPEN [front door switch (driver side) OFF to ON]
    • Door lock operation (operate with Keyless operation key, door request switch .etc)
  • When in any of following conditions (after the exterior light battery saver is activated), exterior lamps can be turned ON.
    • Ignition switch is turned from OFF => Other than OFF
    • Lighting switch is changed
    • Front fog light switch is changed