INFINITI QX4 2005 Factory Service Manual

WT-26
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
Inspection 4: Vehicle Speed SignalEES001Q3
MALFUNCTION CODE NO. 52
1. SELF-DIAGNOSTIC RESULT CHECK
1. With the ignition switch OFF, connect CONSULT-II and CONSULT-II CONVERTER to the data link con-
nector, then turn the ignition switch ON.
2. Select “START (NISSAN BASED VHCL)”.
3. Select "BCM" on “SELECT SYSTEM” screen.
NOTE:
If the BCM is not indicated, refer to LAN-5, "
CAN COMMUNICATION" .
4. Select "BCM C/U" on "SELECT WORK ITEM" screen, and select "SELF-DIAG RESULTS".
5. Check display contents in self-diagnostic results.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?
YES >> Malfunction in CAN communication system. GO TO LAN-5, "CAN COMMUNICATION"
NO >> GO TO 2.
2. CHECK BCM
Perform BCM diagnosis. Refer to BCS-11, "
CONSULT–II INSPECTION PROCEDURE" .
Inspection results OK?
OK >> Perform Vehicle Speed Sensor Inspection. Refer to EC-373, "Diagnostic Procedure" .
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installation of BCM" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
WT-27
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Revision: October 20052005 QX56
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
Inspection 1: Warning Lamp Does Not Come On When Ignition Switch Is Turned
On
EES001Q4
DIAGNOSTIC PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK
1. With the ignition switch OFF, connect CONSULT-II and CONSULT-II CONVERTER to the data link con-
nector, then turn the ignition switch ON.
2. Select “START (NISSAN BASED VHCL)”.
3. Select "BCM" on “SELECT SYSTEM” screen.
NOTE:
If the BCM is not indicated, refer to LAN-5, "
CAN COMMUNICATION" .
4. Select "BCM C/U" on "SELECT WORK ITEM" screen, and select "SELF-DIAG RESULTS".
5. Check display contents in self-diagnostic results.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?
YES >> Malfunction in CAN communication system. Go To LAN-5, "CAN COMMUNICATION" .
NO >> GO TO 2.
2. CHECK COMBINATION METER
Check combination meter operation.
Inspection results OK?
OK >> GO TO 3.
NG >> Check combination meter. Refer to DI-8, "
Combination Meter" .
3. CHECK LOW TIRE PRESSURE WARNING LAMP
Disconnect BCM harness connector.
Does the low tire pressure warning lamp activate?
YES >> Replace BCM. Refer to BCS-20, "Removal and Installation of BCM" .
NO >> Check combination meter and repair or replace.
Inspection 2: Warning Lamp Stays On When Ignition Switch Is Turned OnEES001II
DIAGNOSTIC PROCEDURE
1. CHECK CONNECTOR
1. Disconnect BCM harness connectors M18 and M20.
2. Check terminals for damage or loose connections.
Inspection results OK?
OK >> GO TO 2.
NG >> Repair or replace damaged parts.

WT-28
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
2. CHECK POWER SUPPLY CIRCUIT (BAT)
Check voltage between BCM harness connector M20 terminal 70 (W/B) and ground.
1.
OK or NG
OK >> GO TO 3.
NG >> Check BCM power supply circuit for open or short.
3. CHECK POWER SUPPLY CIRCUIT (IGN)
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector M18 terminal 38 (W/L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Check BCM power supply circuit for open or short.
4. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector M20 terminal 67 (B) and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "Removal and Installa-
tion of BCM" .
NG >> Repair BCM ground circuit.Te r m i n a l s
Vo l t a g e
(Approx.)
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground 12V
M20 70 (W/B)
LEIA0098E
Te r m i n a l s
Vo l t a g e
(Approx.)
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground 12V
M18 38 (W/L)
WEIA0038E
Terminals Continuity
(+) (–)
ConnectorTe r m i na l
(Wire color)
Ground Yes
M20 67 (B)
LIIA1040E

TROUBLE DIAGNOSIS FOR SYMPTOMS
WT-29
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Inspection 3: Warning Lamp Flashes When Ignition Switch Is Turned OnEES001IJ
NOTE:
If warning lamp flashes as shown, the system is normal.
Flash Mode A

This mode shows transmitter status is OFF-mode.
Carry out transmitter wake up operation. Refer to WT-16,
"Transmitter Wake Up Operation" .
DIAGNOSTIC PROCEDURE
1. CHECK CONNECTOR
1. Disconnect BCM harness connectors M18 and M20.
2. Check terminals for damage or loose connections.
Inspection results OK?
OK >> GO TO 2.
NG >> Repair or replace damaged parts.
2. CHECK TIRE PRESSURE WARNING CHECK CONNECTOR CIRCUIT
Check continuity between BCM harness connector M18 terminal 15 (L/W) and check connector M123 terminal
1 (L/W).
OK or NG
OK >> Replace BCM. Refer to BCS-20, "Removal and Installa-
tion of BCM" .
NG >> Repair or replace harness connector.
SEIA0347E
Continuity should exist
WEIA0097E

WT-30
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
Inspection 4: Hazard Warning Lamp Flashes When Ignition Switch Is Turned OnEES001IK
DIAGNOSTIC PROCEDURE
1. CHECK GROUND CIRCUIT
1. Disconnect BCM harness connector M20.
2. Check continuity between BCM harness connector M20 terminal 67 (B) and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "Removal and Installa-
tion of BCM" .
NG >> Repair BCM ground circuit.Te r m i na l s
Continuity
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground Yes
M20 67 (B)LIIA1040E

TROUBLE DIAGNOSIS FOR SYMPTOMS
WT-31
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Inspection 5: “TIRE PRESSURE” Information In Display Unit Does Not ExistEES001Q5
DIAGNOSTIC PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK
1. With the ignition switch OFF, connect CONSULT-II and CONSULT-II CONVERTER to the data link con-
nector, then turn the ignition switch ON.
2. Select “START (NISSAN BASED VHCL)”.
3. Select "BCM" on “SELECT SYSTEM” screen.
NOTE:
If the BCM is not indicated, refer to LAN-5, "
CAN COMMUNICATION" .
4. Select "BCM C/U" on "SELECT WORK ITEM" screen, and select "SELF-DIAG RESULTS".
5. Check display contents in self-diagnostic results.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?
YES >> Malfunction in CAN communication system. Go To LAN-5, "CAN COMMUNICATION" .
NO >> GO TO 2.
2. CHECK DISPLAY UNIT
Perform display unit self-diagnosis. Refer to AV- 1 0 4 , "
Self-Diagnosis Mode (NAVI)" .
Inspection results OK?
OK >> Replace BCM. Refer to BCS-20, "Removal and Installation of BCM" .
NG >> Repair or replace malfunctioning parts.
Inspection 6: ID Registration Cannot Be CompletedEES001IM
DIAGNOSTIC PROCEDURE
1. ID REGISTRATION (ALL)
Carry out ID registration of all transmitters.
Can ID registration of all transmitters be completed?
YES >> Inspection End.
NO >> Go To WT-24, "
Inspection 1: Transmitter or Control Unit (BCM)" .

WT-32
REMOVAL AND INSTALLATION
Revision: October 20052005 QX56
REMOVAL AND INSTALLATIONPFP:00000
Transmitter (Pressure Sensor)EES001IN
REMOVAL
1. Deflate tire. Unscrew transmitter retaining nut and allow transmitter to fall into tire.
2. Gently bounce tire so that transmitter falls to bottom of tire.
Place wheel and tire assembly on tire changing machine and
break both tire beads. Ensure that the transmitter remains at the
bottom of the tire while breaking the bead.
3. Turn tire so that valve hole is at bottom, and gently bounce the
tire to ensure transmitter is near valve hole. Carefully lift tire onto
turntable and position valve hole (and transmitter) 270 degrees
from mounting/dismounting head.
4. Lubricate tire well, and remove top side of tire. Reach inside the
tire and remove the transmitter.
5. Remove the second side of the tire as nornal.
INSTALLATION
1. Place first side of tire onto rim.
2. Mount transmitter on rim and tighten nut.
SEIA0047E
SEIA0048E
SEIA0049E
Transmitter nut
tightening torque: 5.5 N·m (0.56 kg-m, 49 in-lb)
WEIA0137E

REMOVAL AND INSTALLATION
WT-33
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Revision: October 20052005 QX56
3. Place wheel on turntable of tire machine. Ensure that transmitter
is 270 degrees from mounting/dismounting head.
NOTE:
Do not touch transmitter with mounting head.
4. Lubricate tire well, and install second side of tire as normal.
Ensure that tire does not rotate relative to rim.
5. Inflate tire and balance the wheel and tire assembly. Refer to
WT-6, "
Wheel Balance Adjustment" .
6. Install Wheel and tire assembly in appropriate wheel position on
vehicle.
NOTE:
If replacing the transmitter, then transmitter wake up operation must be performed. Refer to WT-16,
"Transmitter Wake Up Operation" .
7. Adjust neutral position of steering angle sensor. Refer to BRC-62, "
Adjustment of Steering Angle Sensor
Neutral Position" .
SEIA0048E

WT-34
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: October 20052005 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Road WheelEES001IO
TireEES001IP
Unit: kPa (kg/cm2 , psi) Wheel typeAluminum
Maximum radial runout limitLateral mm (in) 0.3 (0.012) or less
Radial mm (in) 0.3 (0.012) or less
Maximum residual imbalanceDynamic (at rim flange) Less than 5 g (0.18 oz) (per side)
Static (at rim flange) Less than 10 g (0.35 oz)
Tire s izeAir pressure
Conventional tire Spare tire
Full size spare tire — 240 (2.4, 35)
P265/70R18 240 (2.4, 35) —

WW-1
WIPER, WASHER & HORN
K ELECTRICAL
CONTENTS
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SECTION WW
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Revision: October 20052005 QX56 PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
FRONT WIPER AND WASHER SYSTEM .................. 4
Components Parts and Harness Connector Loca-
tion ........................................................................... 4
System Description .................................................. 4
LOW SPEED WIPER OPERATION ...................... 5
HI SPEED WIPER OPERATION ........................... 5
INTERMITTENT OPERATION .............................. 5
AUTO STOP OPERATION .................................... 6
FRONT WASHER OPERATION ........................... 6
MIST OPERATION ................................................ 6
FAIL-SAFE FUNCTION ......................................... 6
COMBINATION SWITCH READING FUNCTION ..... 7
CAN Communication System Description ................ 9
Schematic .............................................................. 10
Wiring Diagram — WIPER — .................................11
Terminals and Reference Values for BCM ............. 14
Terminals and Reference Values for IPDM E/R ..... 15
Work Flow .............................................................. 15
Preliminary Inspection ............................................ 15
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 15
CONSULT-II Function (BCM) ................................. 17
CONSULT-II OPERATION .................................. 17
WORK SUPPORT ............................................... 18
DATA MONITOR ................................................. 18
ACTIVE TEST ..................................................... 19
CONSULT-II Function (IPDM E/R) ......................... 19
CONSULT-II OPERATION .................................. 19
DATA MONITOR ................................................. 20
ACTIVE TEST ..................................................... 21
Trouble Diagnosis .................................................. 21
FRONT WIPER DOES NOT OPERATE ............. 21
FRONT WIPER STOP POSITION IS INCOR-
RECT .................................................................. 24
ONLY FRONT WIPER LOW DOES NOT OPER-ATE ...................................................................... 25
ONLY FRONT WIPER HI DOES NOT OPERATE ... 27
ONLY FRONT WIPER INT DOES NOT OPER-
ATE ...................................................................... 28
FRONT WIPER INTERMITTENT OPERATION
SWITCH POSITION CANNOT BE ADJUSTED ... 29
WIPERS DO NOT WIPE WHEN FRONT
WASHER OPERATES ........................................ 29
FRONT WIPERS OPERATE FOR 10 SECONDS,
STOP FOR 20 SECONDS, AND AFTER
REPEATING THIS OPERATION FIVE TIMES,
THEY BECOME INOPERATIVE ......................... 29
Removal and Installation of Front Wiper Arms,
Adjustment of Wiper Arms Stop Location ............... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 31
Removal and Installation of Wiper Motor and Link-
age .......................................................................... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 32
Washer Nozzle Adjustment .................................... 32
Washer Tube Layout .............................................. 33
Removal and Installation of Wiper and Washer
Switch ..................................................................... 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 33
Removal and Installation of Washer Tank .............. 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 34
Removal and Installation of Washer Motor ............. 34
REMOVAL ........................................................... 34
INSTALLATION ................................................... 34
REAR WIPER AND WASHER SYSTEM .................. 35
Components Parts and Harness Connector Loca-
tion .......................................................................... 35
System Description ................................................. 35
REAR WIPER OPERATION ................................ 36
INTERMITTENT OPERATION ............................ 36
AUTO STOP OPERATION .................................. 37
REAR WASHER OPERATION ............................ 37