2011 INFINITI QX56 Eco

TRANSMITTERWT-67
< REMOVAL AND INSTALLATION >
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1. Put first side of tire onto rim.
2. Mount transmitter on rim and tighten nut. CAUTION:
Speed for tightening nut sh ould be less than 10 rpm.
3. Place wheel on turntable of tire machine. Ensure that transmitter (1) is 270 degree from mounting head (2) when second side of
tire is fitted.
NOTE:
Do not touch transmitter at mounting head.
4. Lubricate tire well and fit second side of tire as normal. Ensure that tire does not rotate relative to rim.
5. Inflate tire and fit to appropriate wheel position.
6. Perform the transmitter wake-up after replacing transmitter. Refer to WT-28, "
Work Procedure".
SEIA0049E
JPEIC0014GB
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< SYSTEM DESCRIPTION >
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 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 via 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 2 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 rela y according to the front wiper request signal (LO).
 The washer pump is grounded through the combinati on 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 fr ont wiper operation linked with washer.
 IPDM E/R turns ON the integrated front wiper rela y according to the front wiper request signal (LO).
WIPER LINKED AUTO LIGHTING FUNCTION
When light switch is in the AUTO position, front wiper operates, and then headlamp illuminates. Refer to EXL-
11 , "AUTO LIGHT SYSTEM : System Description (For CANADA)" or EXL-12, "AUTO LIGHT SYSTEM : Sys-
tem Description (Except for CANADA)".
FRONT WIPER AND WASHER SYSTEM : Fail-safeINFOID:0000000006300453
IPDM E/R
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With BCM
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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.
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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
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< SYSTEM DESCRIPTION >
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HEADLAMP WASHER SYSTEM : System DiagramINFOID:0000000006372942
HEADLAMP WASHER SYSTEM : System DescriptionINFOID:0000000006372943
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 conditi on 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.
JPLIA1329GB
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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000006349813
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate ea ch device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000006349814
AUTO ACTIVE TEST
Description
In auto active test, the IPDM E/R sends a drive signal to the following systems to check their operation.
 Oil pressure warning lamp
 Rear window defogger
 Front wiper (LO, HI)
 Parking lamp
 License plate lamp
 Tail lamp
 Side marker lamp
 Front fog lamp
 Headlamp (LO, HI)
 A/C compressor (magnet clutch)
Operation Procedure
CAUTION:
Never perform auto active test in the following conditions.
 Engine is running.
 CONSULT-III is connected.
1. Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper
operation)
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON, and within 20 seconds, pr ess the driver door switch 10 times. Then turn the
ignition switch OFF.
CAUTION:
Close passenger door.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
CAUTION:
Engine starts when igniti on switch is turned ON while brake pedal is depressed.
5. The oil pressure warning lamp starts blinking when the auto active test starts.
6. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
 When auto active test has to be cancelled halfway through test, turn the ignition switch OFF.
 When auto active test is not activated, door swit ch may be the cause. Check door switch. Refer to DLK-117,
"ComponentFunctionCheck".
Inspection in Auto Active Test
When auto active test is actuated, the following operation sequence is repeated 3 times.
Operation
sequence Inspection location Operation
1 Oil pressure warning lamp Blinks continuously during operation of auto active test
2 Rear window defogger 10 seconds
3 Front wiper LO for 5 seconds → HI for 5 seconds
4 Parking lamp
 License plate lamp
 Tail lamp
 Side marker lamp
 Front fog lamp 10 seconds
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< SYSTEM DESCRIPTION >
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Concept of auto active test
 IPDM E/R starts the auto active test with the door
switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
 The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test
5 Headlamp LO for 10 seconds →HI ON ⇔ OFF 5 times
6 A/C compressor (magnet clutch) ON ⇔ OFF 5 times
Operation
sequence Inspection location Operation
JMMIA0492GB
Symptom Inspection contents Possible cause
Rear window defogger does not operate Perform auto active test.
Does the rear window defog-
ger operate?YES BCM signal input circuit
NO  Rear window defogger
 Rear window defogger
ground circuit
 Harness or connector be- tween IPDM E/R and rear
window defogger
 IPDM E/R
Any of the following components do not operate
Parking lamp
 License plate lamp
Tail lamp
 Side marker lamp
 Front fog lamp
 Headlamp (HI, LO)
 Front wiper (HI, LO) Perform auto active test.
Does the applicable system
operate?YES BCM signal input circuit
NO  Lamp or motor
 Lamp or motor ground cir-
cuit
 Harness or connector be- tween IPDM E/R and appli-
cable system
 IPDM E/R
A/C compressor does not operate Perform auto active test.
Does the magnet clutch oper-
ate?YES
 A/C auto amp. signal input
circuit
 CAN communication signal
between A/C auto amp. and
ECM
 CAN communication signal
between ECM and IPDM E/
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NO  Magnet clutch
 Harness or connector be-
tween IPDM E/R and mag-
net clutch
 IPDM E/R
Revision: 2010 May2011 QX56