Audible Warning Device: Description and Operation

The warning chime is combined with the warning chime unit.
Power is supplied at all times:
^ through 10 A fuse (No. 21, located in the fuse block)
^ to key switch terminal (1).
Power is supplied at all times:
^ through 10 A fuse (No. 22, located in the fuse block)
^ to lighting switch terminal (1).
With the ignition switch in the ON or START position, power is supplied:
^ through 10 A fuse (No. 11, located in the fuse block)
^ to warning chime unit terminal (3).
Ground is supplied to warning chime unit terminal (4) through body grounds (M49), (M105) and (M160)

Ignition key warning chime
With the key inserted in the ignition switch in the OFF or ACC position, and the driver's door open, the warning chime will sound. A battery positive voltage signal is sent:
^ from key switch terminal (2)
^ to warning chime unit terminal (7).
Ground is supplied:
^ from door switch LH terminal (3)
^ to warning chime unit terminal (5).
Door switch LH terminal (1) is grounded through body ground (M177).

Light warning chime
With the ignition switch in the OFF or ACC position, the driver's door open, and the lighting switch in the 1ST or 2ND position, the warning chime will sound. A battery positive voltage signal is sent:
^ from lighting switch terminal (5)
^ to warning chime unit terminal (8).
Ground is supplied:
^ from door switch LH terminal (3)
^ to warning chime unit terminal (5).
Door switch LH terminal (1) is grounded through body ground (M177).

Seat belt warning chime
With the ignition switch turned from the OFF or ACC position to the ON position, and the seat belt unfastened (seat belt buckle switch ON), the warning chime will sound for approximately 7 seconds.
Ground is supplied:
^ from seat belt buckle switch terminal (1)
^ to warning chime unit terminal (2).
Seat belt buckle switch terminal (2) is grounded through body ground (M177).