Infiniti Q45. Manual — part 913
FRONT WIPER AND WASHER SYSTEM (WITH RAIN SENSOR)
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WIPER OPERATION
Description
The front wiper switch is controlled by a lever built into the combination switch.
There are three wiper switch positions.
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LO speed
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HI speed
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INT (intermittent)
Power is supplied at all times
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through 10A fuse [No. 3, located in fuse block (J/B) No. 1]
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to BCM terminal 105.
With the ignition switch in the ON or START position, power is supplied
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through 20A fuse [No. 34, located in fuse block (J/B) No. 2]
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to front wiper motor terminal 4
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to front wiper relay terminal 1
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to front wiper rain relay terminal 1
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through 10A fuse [No. 1, located in fuse block (J/B) No. 1]
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to BCM terminal 68
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to rain sensor terminal 1
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through 10A fuse [No. 9, located in fuse block (J/B) No. 1]
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to combination meter terminal 59.
Ground is supplied
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to front wiper switch terminals 17 and 20
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through grounds M25 and M115.
Low (MIST) and High Speed Wiper Operation
When the front wiper switch is placed in the LO or MIST position, ground is supplied
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through front wiper switch terminal 14
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to front wiper rain relay terminal 3
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through front wiper rain relay terminal 4
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to front wiper motor terminal 6.
With power and ground supplied, the front wiper motor operates at low speed.
When the front wiper switch is placed in the HI position, ground is supplied
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through front wiper switch terminal 16
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to front wiper motor terminal 5.
With power and ground supplied, the front wiper motor operates at high speed.
Auto Stop Operation
When the front wiper switch is placed in the OFF position, the front wiper motor will continue to operate until
the wiper arms reach the base of the windshield (auto stop). When the front wiper switch is placed in the OFF
position, ground is supplied
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from front wiper switch terminal 14
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to front wiper rain relay terminal 3
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through front wiper rain relay terminal 4
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to front wiper motor terminal 6, in order to continue front wiper motor operation at low speed.
Ground is also supplied until the wiper arms reaches the base of the windshield
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through front wiper switch terminal 13
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to front wiper relay terminal 3
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through front wiper relay terminal 4
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to front wiper motor terminal 3
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through front wiper motor terminal 1
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to grounds E24, E42 and E62.
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FRONT WIPER AND WASHER SYSTEM (WITH RAIN SENSOR)
When the wiper arms reach the base of the windshield, the switch in the front wiper motor moves to the
“STOP” position. The ground path is interrupted and the front wiper motor stops.
Intermittent Operation
When front wiper switch is turned to INT position, wiper performs intermittent operation, low-speed operation,
and high-speed operation according to water drop increase rate on windshield detected by rain sensor. If rain
sensor malfunctions, it operates as vehicle speed sensing wiper during driving and operates intermittent oper-
ation according to INT-volume switch with vehicle stopped. During this time, BCM controls each operation.
When the front wiper switch is placed in the INT position, ground is supplied
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to BCM terminal 9
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from front wiper switch terminal 15
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through grounds M25 and M115.
LOW SPEED OPERATION (Rain sensing)
When the front wiper switch is turned to INT position, power is supplied
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through 20A fuse [No.34, located in fuse block (J/B) No.2]
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to front wiper relay terminal 1
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through front wiper relay terminal 2
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to BCM terminal 128 and
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to front wiper motor terminal 4.
Ground is supplied
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through front wiper motor terminal 6
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to front wiper rain relay terminal 4
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through front wiper rain relay terminal 3
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to front wiper switch terminal 14
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through front wiper switch terminal 13
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to front wiper relay terminal 3
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through front wiper relay terminal 5
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to grounds E24, E42 and E62.
HIGH SPEED OPERATION (Rain sensing)
When the front wiper switch is turned to INT position, power is supplied
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through 20A fuse [No.34, located in fuse block (J/B) No.2]
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to front wiper relay terminal 1
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through front wiper relay terminal 2
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to BCM terminal 128, and
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to front wiper rain relay terminal 1
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through front wiper rain relay terminal 2
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to BCM terminal 126 and
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to front wiper motor terminal 4
Ground is supplied
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through front wiper motor terminal 5
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to front wiper rain relay terminal 5
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through front wiper rain relay terminal 3
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to front wiper switch terminal 14
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through front wiper switch terminal 13
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to front wiper relay terminal 3
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through front wiper relay terminal 5
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to grounds E24, E42 and E62.
The desired interval time is input
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to front wiper switch terminal 19
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from BCM terminal 48
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to BCM terminal 49
FRONT WIPER AND WASHER SYSTEM (WITH RAIN SENSOR)
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from combination meter terminal 18 (vehicle speed signal).
The desired interval time is output
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to front wiper relay terminal 2
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from BCM terminal 128
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through BCM terminals 56 and 113
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to grounds M24 and M114.
With power and ground supplied, the front wiper relay is activated. When activated, an intermittent ground is
supplied
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to front wiper motor terminal 6
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through front wiper rain relay terminal 4
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to front wiper rain relay terminal 3
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through front wiper switch terminal 14
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to front wiper switch terminal 13
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through front wiper relay terminal 3
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to front wiper relay terminal 5
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through grounds E24, E42 and E62.
Front wiper motor operates at desired interval with BCM terminal 9 grounded. Intermittent operation can be
adjusted from
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Approx. 0.9 - 45 sec. (When vehicle is stopped)
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Approx. 0.4 - 30 sec. (When vehicle is running)
Judgment on vehicle stopped or running
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Stopped
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Running: More than 5 km/h (3 MPH)
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Running
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Stopped: Less than 2 km/h (1 MPH)
WASHER OPERATION
With the ignition switch in the ON or START position, power is supplied
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through 20A fuse [No. 34, located in fuse block (J/B) No. 2]
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to front washer pump terminal 1.
When the front wiper switch in the WASH position, ground is supplied
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to front washer pump terminal 2
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to BCM terminal 4
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from front wiper switch terminal 18
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through front wiper switch terminal 17
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through grounds M25 and M115.
With power and ground supplied, the front washer pump operates. The front wiper motor operates at low
speed for about 3 seconds. This feature is controlled by the BCM in the same manner as the intermittent oper-
ation.
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FRONT WIPER AND WASHER SYSTEM (WITH RAIN SENSOR)
Schematic
NKS001F5
TKWM3773E
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