Heated Glass Element: Description and Operation

MODELS WITHOUT POWER DOOR LOCKS
The rear window defogger system is controlled by the rear window defogger timer. The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times
- to rear window defogger relay terminal 3
- through 15 A fuse [No.25, located in the fuse block (J/B)] and
- to rear window defogger relay terminal 6
- through 15 A fuse [No.21, located in the fuse block (J/B)].
With the ignition switch in the ON or START position, power is supplied
- through 7.5 A fuse [No.5, located in the fuse block (J/B)]
- to rear window defogger relay terminal 1 and
- to rear window defogger timer terminal 1.
Ground is supplied to rear window defogger switch terminal 2 and warning chime unit terminal 4 through body grounds M14 and M68.
With the rear window defogger switch ON, ground is supplied
- to rear window defogger timer terminal 3
- through rear window defogger switch terminal 1.
Rear window defogger timer terminal 2 then supplies ground to the rear window defogger relay terminal 2. With power and ground supplied, the rear window defogger relay is energized.
Power is supplied
- through terminals 5 and 7 of the rear window defogger relay
- to rear window defogger terminal +.
Rear window defogger terminal - is grounded through body grounds D402 and D404.
With power and ground supplied, the rear window defogger filaments heat and defog the rear window. When the system is activated, the rear window defogger indicator illuminates in the rear window defogger switch.
Power is supplied
- from rear window defogger relay terminal 5
- to rear window defogger switch terminal 3.
Rear window defogger switch terminal 4 is grounded through body grounds M14 and M68.

MODELS WITH POWER DOOR LOCKS
The rear window defogger system is controlled by the smart entrance control unit. The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times
- to rear window defogger relay terminal 3
- through 15 A fuse [No.25, located in the fuse block (J/B)] and
- to rear window defogger relay terminal 6
- through 15 A fuse [No.21, located in the fuse block (J/B)].
With the ignition switch in the ON or START position, power is supplied
- through 7.5 A fuse [No.5, located in the fuse block (J/B)]
- to rear window defogger relay terminal 1 and
- to smart entrance control unit terminal 11.
Ground is supplied to rear window defogger switch terminal 2 and smart entrance control unit terminal 10 through body grounds M14 and M68.
With the rear window defogger switch ON, ground is supplied
- to smart entrance control unit terminal 20
- through rear window defogger switch terminal 1.
Smart entrance control unit terminal 36 then supplies ground to the rear window defogger relay terminal 2.
With power and ground supplied, the rear window defogger relay is energized.
Power is supplied
- through terminals 5 and 7 of the rear window defogger relay
- to rear window defogger terminal +.
Rear window defogger terminal - is grounded through body grounds D402 and D404.
With power and ground supplied, the rear window defogger filaments heat and defog the rear window. When the system is activated, the rear window defogger indicator illuminates in the rear window defogger switch.
Power is supplied
- from rear window defogger relay terminal 5
- to rear window defogger switch terminal 3.
Rear window defogger switch terminal 4 is grounded through body grounds M14 and M68.