Timer/Control Unit: Description and Operation

Time Control System-IVMS Function:

FUNCTION
^ The IN-Vehicle Multiplexing System (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 function is controlled by the Body Control Module (BCM).
Ground is supplied from body grounds (E5) and (E30) to front wiper switch terminals (17) and (20).
When the wiper switch is placed in the INT position, ground is supplied
^ to BCM terminal (25)
^ from wiper switch terminal (15)
The desired interval time is input
^ to BCM terminal (17)
^ from wiper switch terminal (19)
For further information, refer to "WIPER AND WASHER'.

Washer and wiper combination operation
Operates wiper when washer switch is turned "ON" for at least 0.3 seconds. Power is supplied at ignition switch ACC or ON
^ through 20 A fuse [No. (20) located in the fuse block (J/B)]
^ to wiper relay terminal (1).
Ground is supplied from body grounds (E5) and (E30).
When wiper switch is placed in the WASH position. ground is supplied
^ to BCM terminal (26)
^ from wiper switch terminal (18).
Then ground is supplied from BCM terminal (10) to wiper relay terminal (2) to operate wiper.

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 (J/B)).
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 to operate rear window defogger and door mirror defogger for about 15 minutes.

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 (J/B))
^ to warning buzzer terminal (1), and
^ key switch 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 (J/B))
^ to BCM terminal (29).
Ground is supplied to BCM terminal (31) through front driver's side 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 ACC or 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. (66),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 (J/B))
^ 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 (J/B))
^ to BCM terminal (29).
Ground is supplied to BCM terminal (31) through front driver's side 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 ACC or 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 (J/B))
^ 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 (J/B))
^ 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).