Timer/Control Unit: Description and Operation

Function:

FUNCTION
^ The IVMS has the following time control functions.

INTERMITTENT WIPER CONTROL
Intermittent operation
Intermittent operation can be set variable by turning the intermittent wiper volume knob The wiper motor then operates the wiper at low speed at a set interval of about 1 to 20 seconds. This feature is controlled by the BCM.
When the wiper switch is placed in the INT position, ground is supplied
^ to BCM terminal (25)
^ from wiper switch terminal (15)
^ to wiper switch terminal (17)
^ through body grounds (E5) and (E30).
The desired interval time is input
^ to BCM terminal (17)
^ from wiper switch terminal (19)
For further information, refer to "WIPER AND WASHER'.

REAR WINDOW DEFOGGER TIMER
The rear window defogger and door mirror defogger system are controlled by the BCM.
With the ignition switch in the ON or START position, power is supplied
^ to the rear window defogger relay terminal (1) and
^ to the door mirror defogger relay terminal (1) and
^ to BCM terminal (29)
^ through 7.5 A fuse (No. (12) located in the fuse block in the HEC).
Ground is supplied to terminal (2) of the rear window defogger switch through body grounds (M13) and (M73).
When the rear window defogger switch is ON, ground is supplied
^ through terminal (1) of the rear window defogger switch
^ to BCM terminal (22)
Terminal (15) of the BCM then supplies ground to the rear window defogger relay terminal (2) and door mirror defogger relay terminal (2).
With power and ground supplied, the rear window defogger relay and door mirror defogger relay are energized.
Power is supplied
^ through terminals (5) and (7) of the rear window defogger relay
^ to the rear window defogger and
^ through terminal (5) of the door mirror defogger relay
^ to the door mirror defogger.
The rear window defogger and door mirror defogger have an independent ground.
With power and ground supplied, the rear window defogger and door mirror defogger hot wires heat and defog the rear window and door mirror. When the system is operated, the indicator illuminates.
For power supply and ground to the rear window defogger, refer to 'REAR WINDOW DEFOGGER". Also, for power supply and ground to the door mirror defogger, refer to "DOOR MIRROR".

IGNITION KEY WARNING BUZZER TIMER
Power is supplied at all times
^ through 7.5 A fuse (No. (40),located in the fuse block in the HEC)
^ to warning buzzer terminal (1), and
^ key switch terminal (2).
With the ignition switch in the ON or START position, power is supplied
^ through 7.5 A fuse (No. (12),located in the fuse block in the HEC)
^ to BCM terminal (12).
Ground is supplied to BCM terminal (31) through front door switch LH terminals (2) and (3) when switch is in OPEN position from body grounds (B16) and (B19).
With the key in the ignition switch in the OFF position, and the driver's door OPEN, the warning buzzer will sound.

LIGHT WARNING BUZZER TIMER
Power is supplied at all times
^ through 15 A fuse (No. (51),located in the fuse and fusible link box)
^ to lighting switch terminal (11)
Power is supplied at all times
^ through 7.5 A fuse (No. (40),located in the fuse block in the HEC)
^ to warning buzzer terminal (1).
With the ignition switch in the ON or START position, power is supplied
^ through 7.5 A fuse (No. (12), located in the fuse block in the HEC)
^ to BCM terminal (29).
Ground is supplied to BCM terminal (31) through front door switch LH terminals (2) and (3) when switch is in OPEN position from body grounds (B16) and (B19).
With the ignition switch in the OFF position, the driver's door OPEN, and the lighting switch in the 1ST or 2ND position, the warning buzzer will sound.

SEAT BELT WARNING BUZZER TIMER
Power is supplied at all times
^ through 7.5 A fuse (No. (40),located in the fuse block in the HEC)
^ to warning buzzer terminal (1).
With the ignition switch in the ON or START position, power is supplied
^ through 7.5 A fuse (No. (12) ,located in the fuse block in the HEC)
^ to BCM terminal (29).
Ground is supplied to BCM terminal (9) through seat belt buckle switch terminals (1) and (3) when seat belt buckle switch is in UNFASTENED position, and body grounds (B16) and (B19).
This warning buzzer sounds for about 6 seconds
^ when ignition switch is turned from OFF to ON and seat belt is unfastened (seat belt buckle switch ON).