INFINITI QX56 2010 Factory Service Manual

WW-10
< 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
ALLIA0842ZZ
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

DIAGNOSIS SYSTEM (BCM)WW-11
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000005369209
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.
WIPER
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-54, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM pa rt number is displayed.
CONFIGURATION • Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Remote keyless entry system MULTI REMOTE ENT ××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system THEFT ALM ×××
Panic alarm system PANIC ALARM ×
Revision: April 20092010 QX56

WW-12
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
WIPER : CONSULT-III Function (BCM - WIPER)
INFOID:0000000005369212
WORK SUPPORT
*: Factory setting
DATA MONITOR
ACTIVE TEST
Work Item Setting
Item Description
WIPER SPEED
SETTING ON*
With vehicle speed
(Front wiper intermittent time linked with the vehicle speed and wiper intermittent dial position)
OFF Without vehicle speed
(Front wiper intermittent time linked with the wiper intermittent dial position)
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch ON status judged from ignition power supply
IGN SW CAN [ON/OFF] Ignition switch ON status received from IPDM E/R via CAN communication
FR WIPER HI [ON/OFF]
Each switch status that BCM judges from the combination switch reading function
FR WIPER LOW [ON/OFF]
FR WIPER INT [ON/OFF]
FR WASHER SW [ON/OFF]
INT VOLUME [1 - 7]
Each switch status that BCM judges from the combination switch reading function
FR WIPER STOP [ON/OFF] Front wiper motor (stop position) status received from IPDM E/R with CAN communica-
tion
VEHICLE SPEED [km/h] The value of the vehicle speed signal received from combination meter with CAN com-
munication
RR WIPER ON [ON/OFF] Each switch status that BCM judges from the combination switch reading function
RR WIPER INT [ON/OFF]
RR WASHER SW [ON/OFF]
RR WIPER STOP [ON/OFF] Rear wiper motor (stop position) status input from the rear wiper motor
Test Item Operation Description
FR WIPER HI
Transmits the front wiper request signal (HI) to IPDM E/R with CAN communication to op-
erate the front wiper HI operation.
LO Transmits the front wiper request signal (LO) to IPDM E/R with CAN communication to
operate the front wiper LO operation.
INT Transmits the front wiper request signal (INT) to IPDM E/R with CAN communication to
operate the front wiper INT operation.
OFF Stops transmitting the front wiper request signal to stop the front wiper operation.
RISE UP WIPER
TEST ON Outputs the voltage to operate the rear wiper motor.
OFF Stops the voltage to stop.
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (IPDM E/R)WW-13
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000005369213
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure low/coolant pressure high warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan
Operation Procedure
1. Close the hood and front door RH, and lift the wiper arms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the ignition switch OFF.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
5. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
CAUTION:
• If auto active test mode cannot be actua ted, check door switch system. Refer to DLK-71, "
Descrip-
tion".
• Do not start the engine.
Inspection in Auto Active Test Mode
When auto active test mode is actuated, the following 7 steps are repeated 3 times.
Operation
sequence Inspection Location
Operation
1 Rear window defogger 10 seconds
2 Front wipers LO for 5 seconds → HI for 5 seconds
WKIA4655E
Revision: April 20092010 QX56

WW-14
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
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 mode
3 Tail, license and parking lamps 10 seconds
4 Front fog lamps 10 seconds
5 Headlamps LO for 10 seconds → HI on-off for 5 seconds
6 A/C compressor (magnet clutch) ON ⇔ OFF 5 times
7 Cooling fan 10 seconds
Operation
sequence Inspection Location
Operation
WKIA5163E
SymptomInspection contentsPossible cause
Oil pressure low warning indicator does not operate Perform auto active test.
Does the oil pressure low
warning indicator operate?YES
• IPDM E/R signal input cir-
cuit
• ECM signal input circuit
• CAN communication signal
between ECM and combi-
nation meter
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Oil pressure gauge does not operate Perform auto active test.
Does the oil pressure gauge
operate?YES IPDM E/R signal input circuit
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Rear window defogger does not operate Perform auto active test.
Does the rear window defog-
ger operate?YES BCM signal input circuit
NO • Harness or connector be-
tween A/C and AV switch
assembly and AV control
unit
• CAN communication signal between BCM and IPDM E/
R
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (IPDM E/R)WW-15
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
CONSULT - III Function (IPDM E/R)INFOID:0000000005369214
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with IPDM E/R.
SELF DIAGNOSTIC
Refer to PCS-32, "DTCIndex".
DATA MONITOR
Monitor item
Any of the following components do not operate
• Front wipers
•Tail lamps
• License plate lamps
•Parking lamps
• Front fog lamps
• Headlamps (Hi, Lo) Perform auto active test.
Does the applicable system
operate?YES BCM signal input system
NO • Lamp or front wiper motor
malfunction
• Lamp or front wiper motor ground circuit
• Harness or connector be-
tween IPDM E/R and appli-
cable system
• IPDM E/R (integrated relay
malfunction)
A/C compressor does not operate Perform auto active test.
Does the A/C compressor op-
erate?YES
• BCM signal input circuit
• CAN communication signal
between BCM and ECM
• CAN communication signal between ECM and IPDM E/
R
NO • Magnetic clutch malfunction
• Harness or connector be-
tween IPDM E/R and mag-
netic clutch
• IPDM E/R (integrated relay malfunction)
Cooling fan does not operate Perform auto active test.
Does the cooling fan operate?YES
• ECM signal input circuit
• CAN communication signal
between ECM and IPDM E/
R
NO • Cooling fan motor malfunc-
tion
• Harness or connector be- tween IPDM E/R and cool-
ing fan
• IPDM E/R (integrated relay malfunction)
Symptom
Inspection contentsPossible cause
Diagnosis mode Description
Self Diagnostic Result Displays the diagnosis results judged by IPDM E/R.
Data Monitor Displays the real-time input/output data from IPDM E/R input/output data.
Active Test IPDM E/R can provide a drive signal to electronic components to check their operations.
CAN Diag Support Monitor The results of transmit/receive diagnosis of CAN communication can be read.
Monitor Item
[Unit] MAIN SIG-
NALS Description
MOTOR FAN REQ
[1/2/3/4] ×
Displays the status of the cooling fan speed request signal received from ECM via
CAN communication.
A/C COMP REQ
[OFF/ON] ×Displays the status of the A/C request signal received from AV control unit via
CAN communication.
Revision: April 20092010 QX56

WW-16
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
ACTIVE TEST
Te s t i t e m
TA I L & C L R R E Q
[OFF/ON]×Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[OFF/ON] ×
Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[OFF/ON] ×Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[OFF/ON] ×Displays the status of the front fog lamp request signal received from BCM via
CAN communication.
FR WIP REQ
[STOP/1LOW/LOW/HI] ×
Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P] ×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[OFF/Block] ×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
ST RLY REQ
[OFF/ON] Displays the status of the starter request signal received from ECM via CAN com-
munication.
IGN RLY
[OFF/ON] ×
Displays the status of the ignition relay judged by IPDM E/R.
RR DEF REQ
[OFF/ON] ×Displays the status of the rear defogger request signal received from AV control
unit via CAN communication.
OIL P SW
[OPEN/CLOSE] Displays the status of the oil pressure switch judged by IPDM E/R.
DTRL REQ
[OFF] Displays the status of the daytime light request signal received from BCM via CAN
communication.
HOOD SW
[OPEN/CLOSE] Displays the status of the hood switch judged by IPDM E/R.
THFT HRN REQ
[OFF/ON] Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[OFF/ON] Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Monitor Item
[Unit] MAIN SIG-
NALS Description
Test item
Operation Description
REAR DEFOGGER OFF
OFF
ON Operates rear window defogger relay.
FRONT WIPER OFF
OFF
LO Operates the front wiper relay.
HI Operates the front wiper relay and front wiper high relay.
MOTOR FAN 1O
FF
2O FF
3 Operates the cooling fan relay.
4 Operates the cooling fan relay.
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (IPDM E/R)WW-17
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
EXTERNAL LAMPS OFF
OFF
TAIL Operates the tail lamp relay.
LO Operates the headlamp low relay.
HI Operates the headlamp low relay and the headlamp high LH/RH relays at 1 sec-
ond intervals.
FOG Operates the front fog lamp relay
HORN ONOperates horn relay for 20 ms.
Test item
Operation Description
Revision: April 20092010 QX56

WW-18
< COMPONENT DIAGNOSIS >
WIPER AND WASHER FUSE
COMPONENT DIAGNOSIS
WIPER AND WASHER FUSE
DescriptionINFOID:0000000005146770
Fuse list
Diagnosis ProcedureINFOID:0000000005146771
1. CHECK FUSES
Check that the following fuses are not blown.
Is the fuse blown?
YES >> Replace the fuse after repairing the applicable circuit.
NO >> The fuse is normal.
Unit LocationFuse No. Capacity
Front wiper motor IPDM E/R3930 A
Front and rear washer motor Fuse block (J/B)910 A
Unit LocationFuse No. Capacity
Front wiper motor IPDM E/R3930 A
Front and rear washer motor Fuse block (J/B)910 A
Revision: April 20092010 QX56

FRONT WIPER MOTOR LO CIRCUITWW-19
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
FRONT WIPER MOTOR LO CIRCUIT
Component Function CheckINFOID:0000000005146772
1. CHECK FRONT WIPER LO OPERATION
IPDM E/R AUTO ACTIVE TEST
1. Start IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the front wiper operates at the LO operation.
CONSULT-III ACTIVE TEST
1. Select "FRONT WIPER" of IPDM E/R active test item.
2. While operating the test item, check front wiper operation.
Is front wiper (LO) operation normal?
YES >> Front wiper motor LO circuit is normal.
NO >> Refer to WW-19, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146773
Regarding Wiring Diagram information, refer to WW-31, "Wiring Diagram".
1. CHECK FRONT WIPER MOTOR FUSE
1. Turn the ignition switch OFF.
2. Check that the following fuse is not blown.
Is the fuse blown?
YES >> GO TO 2
NO >> GO TO 3
2. CHECK FRONT WIPER MOTOR (LO) SHORT CIRCUIT
1. Disconnect IPDM E/R and front wiper motor.
2. Check continuity between IPDM E/R harness connector and ground.
Does continuity exist?
YES >> Repair or replace harness.
NO >> Replace the fuse. (Replace IPDM E/R if the fuse is blown again.)
3. CHECK FRONT WIPER MOTOR (LO) OUTPUT VOLTAGE
CONSULT-III ACTIVE TEST LO : Front wiper (LO) operation
OFF : Stop the front wiper.
Unit Location Fuse No. Capacity
Front wiper motor IPDM E/R39 30 A
IPDM E/R
GroundContinuity
Connector Terminal
E121 32 No
ALLIA0447ZZ
Revision: April 20092010 QX56