sensor INFINITI QX56 2011 Factory Service Manual

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Pages: 5598, PDF Size: 94.53 MB

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Page 5527 of 5598

INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >
SYSTEM
FRONT WIPER AUTO OPERATION
Rain Detection
Rain level and sensor conditions are detected by light & rain sensor.
BCM transmits the vehicle conditions (vehicle spee

WW-8
< SYSTEM DESCRIPTION >
SYSTEM
FRONT WIPER AUTO OPERATION
Rain Detection
Rain level and sensor conditions are detected by light & rain sensor.
BCM transmits the vehicle conditions (vehicle speed, front wiper condition, rain sensor sensitivity setting,
etc.) to the light & rain sensor via the rain sensor serial link.
Light & rain sensor judges a wiping speed for front wi per by rain condition and the vehicle conditions. And it
transmits the wiping speed request signal to t he BCM via the rain sensor serial link.
Auto Wiping Operation
BCM receives the wiping speed request signal from the light & rain sensor via the rain sensor serial link.
BCM controls front wiper operation according to t he wiping speed request signals. And it transmits the front
wiper request signals (LO or HI) to the IPDM E/R via CAN communication line.
Front wiper AUTO operating condition
- Ignition switch ON
- Front wiper switch AUTO
NOTE:
When the front wiper switch is turned to AUTO positi on, front wiper operates once regardless of rainy condi-
tions.
Rain Sensor Sensitivity Setting
BCM determines rain sensor sensitivity according to wiper volume dial position.
NOTE:
When the wiper volume dial position is turned up by 1 level under front wiper AUTO operating condition, front
wiper operates once.
Splash mode operation
Front wiper is operated at HI regardl ess of the wiper volume adjustment position, when water drops are instan-
taneously sprayed over the windshield glass due to wate r splash from oncoming vehicles or other causes.
After that, AUTO operation is performed depending on the amount of water drops.
SPLASH MODE OPERATION CONDITIONS Front wiper switch AUTO
Ignition switch ON
NOTE:
Splash mode is not operated and auto wiping operati on is performed, while the vehicle 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 stop position signal from the front wiper motor and detects the front wiper
motor position (stop position/except stop position).
Wiper volume dial position Sensitivity
1 High sensitivity
2
3 Medium−high sensitivity
4
5 Low−medium sensitivity
6
7 Low sensitivity
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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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 conditi ons listed below, IPDM

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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 conditi ons 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 c ondition 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 DiagramINFOID:0000000006300457
REAR WIPER AND WASHER S YSTEM : System DescriptionINFOID: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.
JMLIA0612GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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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 LINK

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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 thr ough 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 thr ough 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 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 once approximately three seconds later after the washer
interlocking operation of the rear wiper.
REAR WIPER AND WASHER SYSTEM : Fail SafeINFOID:0000000006300459
REAR WIPER MOTOR PROTECTION
BCM detects the rear wiper stopping position ac cording 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
Revision: 2010 May2011 QX56