Heated Glass Element: Description and Operation

FUNCTION







^ The following time control function is controlled by BCM.

REAR WINDOW DEFOGGER TIMER
The rear window defogger system is controlled by the BCM.
Power is supplied at all times
^ through 15 A fuse [No. [38], located in the fuse block (J/B)]
^ to the rear window defogger relay terminal (6), and
^ through 15 A fuse [No. [39], located in the fuse block (J/B)]
^ to the rear window defogger relay terminal (3).
With the ignition switch in the ON or START position, power is supplied
^ to the rear window defogger relay terminal (1) and,
^ to BCM terminal (68)
^ through 7.5 A fuse [No. [32], located in the fuse block (J/B)].
When the rear window defogger switch is ON, ground is supplied
^ through terminal (2) of the rear window defogger switch (A/C control unit)
^ to BCM terminal (10).
Terminal (1) of the BCM then supplies ground to the rear window defogger relay terminal (2).
With power and ground supplied, the rear window defogger relay is energized to operate rear window defogger for about 15 minutes.
When the system is activated, the rear window defogger indicator in the rear window defogger switch illuminates.
Power is supplied
^ from rear window defogger relay terminal (5)
^ to A/C auto amp. terminal (5).
Then A/C auto amp. sends an indicator signal to A/C control unit combined with rear window defogger switch.