Rear Window Defogger System does not Operate: Description

When the rear window defogger switch, which is built into the A/C control assembly, is operated, the operation signals are transmitted to the A/C amplifier assembly via LIN. Then the A/C amplifier assembly transmits the operation signal to the front controller via BEAN. When the A/C amplifier assembly receives the signals, it turns on the RR DEF relay to operate the rear window defogger.