2010 INFINITI QX56 wiper

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Reference Value .....................................................57
Terminal Layout ......................................................59
Physical Values ......................................................60
Wiring Diagram .......................................................65
Fail Safe .................................................................68
DTC Index ..............................................................70
SYMPTOM DIAGNOSIS .............................71
WIPER AND WASHER SYSTEM SYMPTOMS
...
71
Symptom Table ................................................... ...71
NORMAL OPERATING CONDITION ................74
Description ........................................................... ...74
FRONT WIPER DOES NOT OPERATE ............75
Description ........................................................... ...75
Diagnosis Procedure ..............................................75
PRECAUTION .............................................77
PRECAUTION ... .............................................. ...77
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
77
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
77
ON-VEHICLE REPAIR ................................79
FRONT WIPER ARM ...................................... ...79
Front Wiper Arms ................................................. ...79
FRONT WIPER DRIVE ASSEMBLY .................80
Wiper Motor and Linkage ..................................... ...80
FRONT WASHER TUBE ...................................81
Washer Tube Layout ............................................ ...81
FRONT WASHER NOZZLE ..............................82
Washer Nozzle Adjustment .................................. ...82
WASHER TANK ................................................83
Washer Fluid Reservoir ..........................................83
FRONT WASHER PUMP ..................................84
Washer Motor ...................................................... ...84
FRONT WIPER AND WASHER SWITCH .........85
Wiper and Washer Switch .................................... ...85
REAR WIPER AND WASHER SYSTEM ...........86
Rear Wiper Arm ................................................... ...86
Rear Wiper Motor ....................................................86
Rear Washer Nozzle Adjustment ............................87
Rear Washer Tube Layout ......................................88
Rear Washer Nozzle ...............................................88
Rear Wiper and Washer Switch ..............................88
Washer Fluid Reservoir ....................................... ...89
Washer Motor .........................................................89
Revision: April 20092010 QX56

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< FUNCTION DIAGNOSIS >
FRONT WIPER AND WASHER SYSTEM
FUNCTION DIAGNOSIS
FRONT WIPER AND WASHER SYSTEM
System DiagramINFOID:0000000005146758
System DescriptionINFOID:0000000005146759
OUTLINE
The front wiper is controlled by each function of BCM and IPDM E/R.
Control by BCM
• Combination switch reading function
• Front wiper control function
Control by IPDM E/R
• Front wiper control function
• Relay control function
FRONT WIPER BASIC OPERATION
• BCM detects the combination switch conditi on by the combination switch reading function.
• BCM transmits the front wiper request signal to IPDM E/R with CAN communication depending on each
operating condition of the front wiper.
• IPDM E/R turns ON/OFF the integrated front wiper rela y and the front wiper high relay according to the front
wiper request signal. IPDM E/R provides the power supply to operate the front wiper HI/LO operation.
FRONT WIPER LO OPERATION
• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the
front wiper LO operating condition.
Front wiper LO operating condition
- Ignition switch ON
- Front wiper switch LO or front wiper switch MIST (while pressing)
• IPDM E/R turns ON the integrated front wiper rela y according to the front wiper request signal (LO).
FRONT WIPER HI OPERATION
• BCM transmits the front wiper request signal (HI) to IPDM E/R with CAN communication according to the
front wiper HI operating condition.
Front wiper HI operating condition
- Ignition switch ON
- Front wiper switch HI
• IPDM E/R turns ON the integrated front wiper relay and the front wiper high relay according to the front wiper request signal (HI).
FRONT WIPER INT OPERATION (L INKED WITH VEHICLE SPEED)
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< FUNCTION DIAGNOSIS >
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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 inte rval 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 st op position of the front wiper motor according to the front wiper stop
position signal received from IP DM 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 si gnal when the front wiper switch is turned OFF.
• IPDM E/R detects the front wiper auto stop signal fr om the front wiper motor and detects the front wiper
motor position (stop positi on/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
1S hort
↑
↓
Long 0.8
0.60.40.24
2 4321 .2
31 07.5 5 3
41 612 84.8
5 241 8127.2
6 322 4169.6
7 423 1.52 11 2.6
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< FUNCTION DIAGNOSIS >
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 s witch 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 rela y 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 accordi ng 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 rela y 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
WW-68, "
FailSafe".
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< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000005146760
Component DescriptionINFOID:0000000005146761
1. IPDM E/R E121, E122, E124 2. Air cleaner case 3. Front and rear washer motor E105
4. Washer fluid reservoir 5. Front wiper motor E23
(view with cowl top removed) 6. Combination switch M28
7. BCM M18, M20
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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) Refer to WW-4, "
System Diagram".
Combination meter Transmits the vehicle speed signal to BCM with CAN communication.
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< FUNCTION DIAGNOSIS >
REAR WIPER AND WASHER SYSTEM
REAR WIPER AND WASHER SYSTEM
System DiagramINFOID:0000000005146762
System DescriptionINFOID:0000000005146763
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 ac cording 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.
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< FUNCTION DIAGNOSIS >
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• BCM reads an auto stop signal from the rear wiper motor to detect a rear wiper motor position.
• When the rear wiper motor is at other than the stopping position, BCM continues to supply power to the rear
wiper motor until it returns to the stopping position.
NOTE:
BCM stops supplying power to the rear wiper motor when the ignition switch is turned OFF.
REAR WIPER OPERATION LINKED WITH WASHER
• BCM supplies power to the rear wiper motor according to the washer linked operating condition of rear
wiper. When the rear washer switch is turned OFF, BC M controls rear wiper to operate approximately three
times.
Washer linked operating condition of rear wiper- Ignition switch ON
- Rear washer switch ON (0.4 second or more)
• Front and rear washer motor becomes grounded through the combination switch when the rear washer switch is turned ON.
REAR WIPER DROP WIPE OPERATION
• BCM controls the rear wiper to operate once acco rding to the rear wiper drop wipe operating condition.
Rear wiper drop wipe operating condition
- Ignition switch ON
- Rear wiper switch OFF
- Rear washer switch OFF
• BCM controls the rear wiper so that it operates onc e time approximately three seconds later after the washer
interlocking operation of the rear wiper.
REAR WIPER FAIL −SAFE OPERATION
BCM performs the fail-safe function when the rear wiper auto stop circuit is malfunctioning. Refer to BCS-53,
"FailSafe".
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< FUNCTION DIAGNOSIS >
REAR WIPER AND WASHER SYSTEM
Component Parts Location
INFOID:0000000005146764
Component DescriptionINFOID:0000000005146765
1. Steering column (v iew with instrument
panel removed) 2. BCM M18, M19, M20
3. Rear washer nozzle
4. Rear wiper motor D704 5. Air cleaner case6. Front and rear washer motor connector
E105
7. Washer fluid reservoir 8. Combination switch M28 9. Glass hatch ajar switch D707
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Part Description
BCM • Judges each switch status by the combination switch reading function.
• Supplies power to the rear wiper motor.
• Performs the auto stop control of the rear wiper.
Combination switch
(Wiper and washer switch) Refer to BCS-7, "
System Diagram".
Revision: April 20092010 QX56