Heated Glass Element: Description and Operation

System Description

The rear window defogger system is controlled by the smart entrance control unit. The rear window defogger operates for approximately 15 minutes.

Power is supplied at all times
- to rear window defogger relay terminals 7 and 5
- through 45 A fusible link (letter i, located in the fuse and fusible link box).

With the ignition switch in the ON position, power is supplied
- to the rear window defogger relay terminal 1.

With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse (No.30, located in the fuse block)
- to smart entrance control unit terminal 43.
Ground is supplied to rear window defogger switch terminal 2 through body grounds M68, M105 and M130.

When the rear window defogger switch is turned ON, ground is supplied
- through rear window defogger switch terminal 1
- to smart entrance control unit terminal 23.
Then, smart entrance control unit terminal 22 supplies ground to the rear window defogger relay terminal 2.
With power and ground supplied, the rear window defogger relay is energized.

Power is then supplied
- through terminals 6 and 3 of the rear window defogger relay
- through 20 A fuses (Nos. 15 and 14, located in the fuse block)
- to rear window defogger terminal 1.
The rear window defogger has an independent ground.

With power and ground supplied, the rear window defogger filaments heat and defog the rear window. With the rear window defogger relay energized, power is also supplied
- from terminals 6 and 3 of the rear window defogger relay
- through 10 A fuse (No.16, located in the fuse block).
- to terminal 3 of the rear window defogger switch
Ground is supplied to rear window defogger switch terminal 4 through body grounds M68, M105 and M130. With power and ground supplied, the rear window defogger indicator illuminates in the rear window defogger switch.