System Description

REAR WINDOW DEFOGGER SYSTEM

System Description


OPERATION DESCRIPTION

- BCM detects that rear window defogger switch is turned ON while ignition switch is ON, and then 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 it receives the rear window defogger control signal.
- The power is supplied to the rear window defogger and door mirror defogger relay (with door mirror defogger) when the rear window defogger relay is turned ON.

TIMER FUNCTION

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