Infiniti QX56 (Z62). Manual - part 1383

 

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Infiniti QX56 (Z62). Manual - part 1383

 

 

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< SYSTEM DESCRIPTION >

SYSTEM

IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop five times.

NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.

BCM

BCM detects the rain sensor serial link error and the light & rain sensor malfunction.
BCM controls the following fail-safe when light & rain sensor has a malfunction.

Fail-safe Control

• Front wiper control
- Front wiper switch AUTO and sensing rain drop: The condition just before the activation of fail-safe is main-

tained until the front wiper switch is turned OFF.

- Front wiper switch AUTO and not sensing rain drop: Front wiper is LO operation until the front wiper switch is

turned off.

REAR WIPER AND WASHER SYSTEM

REAR WIPER AND WASHER SYSTEM : System Diagram

INFOID:0000000006300457

REAR WIPER AND WASHER SYSTEM : System Description

INFOID:0000000006300458

OUTLINE

The rear wiper is controlled by each function of BCM.

Control by BCM

• Combination switch reading function

Control part

Fail-safe operation

Front wiper

• The status just before activation of fail-safe control is maintained until the ignition switch 

is turned OFF while the front wiper is operating at LO or HI speed.

• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe 

control is activated while the front wiper is set in the AUTO mode and the front wiper 
motor is operating.

Headlamp washer relay

Headlamp washer relay OFF

Ignition switch

Front wiper switch

Front wiper stop position signal

ON

OFF

The front wiper stop position signal (stop 
position) cannot be input for 10 seconds.

ON

The front wiper stop position signal does 
not change for 10 seconds.

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SYSTEM

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< SYSTEM DESCRIPTION >

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• 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.
• BCM reads a rear wiper stop position 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, BCM controls rear wiper to operate approximately 3
times.

Washer linked operating condition of rear wiper

- Ignition switch ON

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< SYSTEM DESCRIPTION >

SYSTEM

- Rear washer switch ON (0.4 second or more)
• The washer pump is grounded through the combination switch with the rear washer switch ON.

REAR WIPER OPERATION LINKED WITH REVERSE (WITH RAIN SENSOR)

• BCM controls rear wiper to operate once according to the conditions of rear wiper operation linked with

reverse.

Condition of rear wiper operation linked with reverse 

- Ignition switch ON
- Front wiper switch: LO, HI or AUTO, and the front wiper auto operation ON judgement.
- Rear wiper switch OFF
- Selector lever “R”
• TCM transmits the shift position signal to BCM through the CAN communication line when the selector lever

is shifted to "R".

• BCM supplies power to the rear wiper motor when receiving the shift position signal.

REAR WIPER OPERATION LINKED WITH REVERSE (WITHOUT RAIN SENSOR)

• BCM controls rear wiper to operate once according to the conditions of rear wiper operation linked with

reverse.

Condition of rear wiper operation linked with reverse 

- Ignition switch ON
- Front wiper switch: LO, HI or INT.
- Rear wiper switch OFF
- Selector lever “R”
• TCM transmits the shift position signal to BCM through the CAN communication line when the selector lever

is shifted to "R".

• BCM supplies power to the rear wiper motor when receiving the shift position signal.

REAR WIPER DROP WIPE OPERATION

• BCM controls the rear wiper to operate once according 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 once approximately three seconds later after the washer

interlocking operation of the rear wiper.

REAR WIPER AND WASHER SYSTEM : Fail Safe

INFOID:0000000006300459

REAR WIPER MOTOR PROTECTION

BCM detects the rear wiper stopping position according to the rear wiper auto stop signal.
When the rear wiper auto stop signal does not change more than 5 seconds while driving the rear wiper, BCM
stops power supply to protect the rear wiper motor.

Condition of cancellation

1.

Pass more than 1 minute after the rear wiper stop.

2.

Operate the rear wiper switch.

HEADLAMP WASHER SYSTEM

SYSTEM

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HEADLAMP WASHER SYSTEM : System Diagram

INFOID:0000000006372942

HEADLAMP WASHER SYSTEM : System Description

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OUTLINE

Headlamp washer is controlled by each function of BCM and IPDM E/R.

Control by BCM

• Combination switch reading function
• Headlamp washer control function

Control by IPDM E/R

• Headlamp washer relay control function

HEADLAMP WASHER BASIC OPERATION

• BCM detects the combination switch condition by the combination switch reading function.
• BCM transmits the headlamp washer request signal to IPDM E/R with CAN communication depending on

each operating condition of the headlamp washer.

Operation by front washer switch (The first time)

- Ignition switch ON
- Headlamps ON
- Front washer switch ON at first time 

Operation by front washer switch (From the second time)

- Ignition switch ON
- Headlamps ON
- Front washer switch ON at fifth time after the first time
• IPDM E/R turns ON/OFF the headlamp washer relay by receiving the headlamp washer request signal, and

controls the headlamp washer.

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