Nissan Xterra. Instruction — part 724
FRONT WIPER AND WASHER SYSTEM
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< SYSTEM DESCRIPTION >
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• BCM transmits the front wiper request signal (INT) to IPDM E/R with CAN communication according to the
front wiper INT operation condition and the intermittent operation delay interval judged value.
Front wiper INT operating condition
- Ignition switch ON
- Front wiper switch INT
Intermittent operation delay interval judgment
- BCM calculates the intermittent operation delay interval from the vehicle speed signal received from the
wiper dial position and the combination meter with CAN communication.
• IPDM E/R turns the integrated front wiper relay ON so that the front wiper is operated only once according to
the front wiper request signal (INT).
• BCM detects stop position/except stop position of the front wiper motor according to the front wiper stop
position signal received from IPDM E/R with CAN communication.
• BCM transmits the front wiper request signal (INT) again after the intermittent operation delay interval after
the front wiper motor is stopped.
FRONT WIPER AUTO STOP OPERATION
• BCM stops transmitting the front wiper request signal when the front wiper switch is turned OFF.
• IPDM E/R detects the front wiper auto stop signal from the front wiper motor and detects the front wiper
motor position (stop position/except stop position).
Wiper intermittent dial posi-
tion
Intermittent
operation
interval
Intermittent operation delay Interval (s)
Vehicle speed
Vehicle stopped or
less than 5 km/h
(3.1 MPH)
5 km/h (3.1 MPH)
or more or less
than 35 km/h (21.7
MPH)
35 km/h (21.7
MPH) or more or
less than 65 km/h
(40.4 MPH)
65 km/h (40.4
MPH) or more
1
Short
↑
↓
Long
0.8
0.6
0.4
0.24
2
4
3
2
1.2
3
10
7.5
5
3
4
16
12
8
4.8
5
24
18
12
7.2
6
32
24
16
9.6
7
42
31.5
21
12.6
JPLIA0094GB
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< SYSTEM DESCRIPTION >
FRONT WIPER AND WASHER SYSTEM
• When the front wiper request signal is stopped, IPDM E/R turns ON the front wiper relay until the front wiper
motor returns to the stop position.
NOTE:
• BCM stops the transmitting of the front wiper request signal when the ignition switch is OFF.
• IPDM E/R turns the front wiper relay OFF when the ignition switch is OFF.
FRONT WIPER OPERATION LINKED WITH WASHER
• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the
washer linked operating condition of the front wiper.
• BCM transmits the front wiper request signal (LO) so that the front wiper operates approximately 3 times
when the front washer switch OFF is detected.
Washer linked operating condition of front wiper
- Ignition switch ON
- Front washer switch ON (0.4 second or more)
• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).
• The front and rear washer motor is grounded through the combination switch with the front washer switch
ON.
FRONT WIPER DROP WIPE OPERATION
• BCM controls the front wiper to operate once according to the conditions of front wiper drop wipe operation.
Front wiper drop wipe operating condition
- Ignition switch ON
- Front wiper switch OFF
- Front washer switch OFF
• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication so that the front
wiper operate once three seconds after front wiper operation linked with washer.
• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).
FRONT WIPER FAIL
−SAFE OPERATION
• IPDM E/R performs the fail-safe function when the front wiper auto stop circuit is malfunctioning. Refer to
.
JPLIA0095GB
FRONT WIPER AND WASHER SYSTEM
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< SYSTEM DESCRIPTION >
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Component Parts Location
INFOID:0000000009484683
Component Description
INFOID:0000000009484684
1.
BCM M18, M20 (view with lower in-
strument panel LH removed)
2.
Front and rear washer motor E105 3.
Washer fluid reservoir
4.
Front wiper motor E23 (view with
cowl top removed)
5.
IPDM E/R E121, E122, E124
6.
Combination switch (wiper and washer
switch) M28
ALLIA0617ZZ
Part
Description
BCM
• Judges each switch status by the combination switch reading function.
• Requests (with CAN communication) the front wiper relay and the front wiper high relay ON to
IPDM E/R.
IPDM E/R
• Controls the integrated relay according to the request (with CAN communication) from BCM.
• Performs the auto stop control of the front wiper.
Combination switch
(Wiper and washer
switch)
.
Combination meter
Transmits the vehicle speed signal to BCM with CAN communication.
Front wiper motor
• IPDM E/R controls front wiper operation.
• Sends wiper stop signal to IPDM E/R.
Front and rear washer
motor
Pumps washer fluid to the front or rear in wash mode.
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< SYSTEM DESCRIPTION >
REAR WIPER AND WASHER SYSTEM
REAR WIPER AND WASHER SYSTEM
System Diagram
INFOID:0000000009484685
System Description
INFOID:0000000009484686
OUTLINE
The rear wiper is controlled by each function of BCM.
Control by BCM
• Combination switch reading function
• Rear wiper control function
REAR WIPER BASIC OPERATION
• BCM detects the combination switch condition by the combination switch reading function.
• BCM controls the rear wiper to start or stop.
REAR WIPER ON OPERATION
• BCM supplies power to the rear wiper motor according to the rear wiper ON operating condition.
Rear wiper ON operating condition
- Ignition switch ON
- Rear wiper switch ON
REAR WIPER INT OPERATION
• BCM supplies power to the rear wiper motor according to the INT operating condition.
Rear wiper INT operating condition
- Ignition switch ON
- Rear wiper switch INT
• BCM controls the rear wiper to operate once.
• BCM detects the rear wiper motor stopping position.
• BCM supplies power to the rear wiper motor after an intermittent from the stop of the rear wiper motor.
REAR WIPER AUTO STOP OPERATION
• BCM stops supplying power to the rear wiper motor when the rear wiper switch is turned OFF.
AWLIA2158GB
JPLIA0165GB
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