System Description

REAR WINDOW DEFOGGER SYSTEM


WITHOUT NAVIGATION : System Description


OPERATION DESCRIPTION
- Turn rear window defogger switch ON when the ignition switch is turned ON. Then A/C controller (rear window defogger switch) transmits rear window defogger switch signal to A/C auto amp. and BCM.
- BCM turns rear window defogger relay ON and transmits rear window defogger control signal to IPDM E/R via CAN communication when rear window defogger switch signal is received.
- Rear window defogger is supplied with power and operates when rear window defogger relay turns ON.
- Rear window defogger relay transmits rear window defogger control signal to A/C auto amp. when rear window defogger operates.
- At the same time, A/C auto amp. transmits rear defogger control signal to A/C controller (rear window defogger switch) and illuminates rear defogger switch indicator.

TIMER FUNCTION
- BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch is turned ON. It makes rear window defogger operate.
- Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns rear window defogger relay OFF. The same operation also occurs during timer operation, if the ignition switch is turned OFF.