System Description

SYSTEM

System Description


SYSTEM DIAGRAM







OPERATION DESCRIPTION

- Turn rear window defogger switch ON while power switch is ON. Then A/C auto amp. transmits rear window defogger switch signal to BCM.
- BCM transmits rear window defogger control signal to IPDM E/R via CAN communication for approximately
15 minutes.
- IPDM E/R turns rear window defogger relay ON when rear window defogger control signal is received.
- When rear window defogger relay turns ON, IPDM E/R transmits rear window defogger control signal to
VCM via CAN communication. VCM transmits rear window defogger status signal to A/C auto amp. via EV
system CAN communication.
- When rear window defogger is activated, indicator lamp on rear window defogger switch turns ON.

TIMER FUNCTION

- BCM transmits the rear window defogger control signal to IPDM E/R for approximately 15 minutes when the rear window defogger switch turns ON while power switch is ON. Then IPDM E/R activates rear window defogger and door mirror defogger (Models with door mirror defogger).
- The timer is cancelled if the rear window defogger switch is pressed again during timer operation. BCM
stops the output of rear window defogger control signal. The same action occurs during timer operation if the power switch is turned OFF.