Nissan Murano: Defogger :: System Description / System

System Description

SYSTEM DIAGRAM

INPUT/OUTPUT SIGNAL CHART

OPERATION DESCRIPTION

• When rear window defogger switch is turned ON while ignition switch ON, the rear window defogger switch signal is transmitted to the A/C auto amp.

• BCM turns rear window defogger relay ON when rear window defogger switch signal is received from A/C auto amp.

• Rear window defogger and door mirror defogger are supplied with power and operate when rear window defogger relay turns ON.

• BCM transmits rear window defogger feedback signal to A/C auto amp. then communicates the signal to the A/C switch assembly when rear window defogger operates.

• Rear window defogger ON is displayed when signal is received.

TIMER FUNCTION

• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch is turned ON and ignition switch ON. It makes rear window defogger and door mirror defogger (if equipped) operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns rear window defogger relay OFF. The same reaction also occurs during timer operation if ignition switch OFF.