relay INFINITI QX56 2006 Factory Service Manual

PG-62
HARNESS
Revision: November 20092006 QX56
Wiring Diagram Codes (Cell Codes)EKS00BNE
Use the chart below to find out what each wiring diagram code stands for.
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
CodeSection Wiring Diagram Name
A/C,A ATC Auto Air Conditioner
A/SUSP RSU Rear Air Suspension
AF1B1 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 1)
AF1B2 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 2)
AF1HB1 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 1)
AF1HB2 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 2)
APPS1 EC Accelerator Pedal Position Sensor
APPS2 EC Accelerator Pedal Position Sensor
APPS3 EC Accelerator Pedal Position Sensor
ASC/BS EC ASCD Brake Switch
ASC/SW EC ASCD Steering Switch
ASCBOF EC ASCD Brake Switch
ASCIND EC ASCD Indicator
A/T AT A/T Assembly
AT/IND DI A/T Indicator Lamp
AUDIO AV Audio
AUT/DP SE Automatic Drive Positioner
AUTO/L LT Auto Light Control
B/CLOS BL Back Door Auto Closure System
BACK/L LT Back-up Lamp
BRK/SW EC Brake Switch
CAN EC CAN Communication Line
CAN LAN CAN System
CHARGE SC Charging System
CHIME DI Warning Chime
CLOCK DI Clock
COOL/F EC Cooling Fan Control
COMBSW LT Combination Switch
COMM AV Audio Visual Communication System
COMPAS DI Compass and Thermometer
D/LOCK BL Power Door Lock
DEF GW Rear Window Defogger
DTRL LT Headlamp - With Daytime Light System
DVD AV DVD Entertainment System
ECM/PW EC ECM Power Supply for Back-Up
ECTS EC Engine Coolant Temperature Sensor
ETC1 EC Electric Throttle Control Function
ETC2 EC Throttle Control Motor Relay
ETC3 EC Throttle Control Motor
F/FOG LT Front Fog Lamp
F/PUMP EC Fuel Pump
FTTS EC Fuel Tank Temperature Sensor
FUELB1 EC Fuel Injection System Bank 1
FUELB2 EC Fuel Injection System Bank 2
H/AIM LT Headlamp Aiming Control
H/PHON AV Hands Free Telephone
H/LAMP LT Headlamp

PG-72
STANDARDIZED RELAY
Revision: November 20092006 QX56
STANDARDIZED RELAYPFP:25230
DescriptionEKS00BNL
NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
TYPE OF STANDARDIZED RELAYS
SEL881H
SEL882H
1M1 Make 2M2 Make
1T 1 Transfer 1M·1B 1 Make 1 Break

STANDARDIZED RELAYPG-73
C
DE
F
G H
I
J
L
M A
B
PG
Revision: November 2009 2006 QX56
WKIA0253E

PG-78
FUSE AND RELAY BOX
Revision: November 20092006 QX56
FUSE AND RELAY BOXPFP:24012
Terminal ArrangementEKS00BNP
WKIA4692E

RF-10
SUNROOF
Revision: November 20092006 QX56
SUNROOFPFP:91210
Component Parts and Harness Connector LocationEIS004VP
System DescriptionEIS004VQ
OUTLINE
Electric sunroof system consists of

Front door switches

Sunroof switch

Sunroof motor assembly

BCM (body control module)
BCM supplies power to the sunroof motor. Sunroof operation depends on sunroof switch condition.
OPERATION
Power is supplied at all times

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70, and

through BCM terminal 69

to sunroof motor assembly terminal 5.
With ignition switch in ON or START position, power is supplied

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to BCM terminal 67 and

to sunroof motor assembly terminal 7

through grounds M57, M61 and M79.
WIIA0465E

RF-18
SUNROOF
Revision: November 20092006 QX56
BCM Power Supply and Ground Circuit CheckEIS004W1
1. CHECK FUSE
Check the following BCM fuse and fusible link.
NOTE:
Refer to RF-10, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connectors.
3. Check voltage between BCM connectors M18 and M20 termi- nals 38, 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
Retained power operation does not operate properly. 1. Check the retained power operation mode setting
RF-112. BCM power supply and ground circuit checkRF-18
3. Door switch checkRF-21
4. Replace sunroof motor assemblyRF-27
Motor does not stop at the sunroof fully-open or fully-
closed position.1. Initialization procedure check
RF-11
2. Replace sunroof motor assemblyRF-27
Sunroof does not do the interruption detection.1. Replace sunroof motor assembly RF-27
SymptomDiagnostic procedure and repair order Refer to page
Component PartsTerminal No. (SIGNAL) AmpereNo. Location
BCM 38 (IGN power supply)
10A59 Fuse and relay box
70 (BAT power supply) 50Af Fuse and fusible link box
ConnectorTe r m i n a l s
ConditionVoltage
(Approx.)
(+) (– )
M18 38
Ground Ignition switch ON
Battery voltage
M20 70 Igniting switch OFF
WIIA0229E
Connector TerminalsContinuity
M20 67Ground YES
LIIA0915E

RSU-1
REAR SUSPENSION
E SUSPENSION
CONTENTS
C
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M
SECTION
A
B
RSU
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for Rear Suspension ....................... ..... 3
PREPARATION ...................................................... ..... 4
Commercial Service Tools ................................... ..... 4
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 5
NVH Troubleshooting Chart ................................ ..... 5
CAN COMMUNICATION ....................................... ..... 6
System Description ............................................. ..... 6
TROUBLE DIAGNOSIS ......................................... ..... 7
How to Perform Trouble Diagnoses for Quick and
Accurate Repair .................................................. ..... 7
INTRODUCTION .............................................. ..... 7
CLARIFY CONCERN ....................................... ..... 7
WORK FLOW ........................................................ 8
Component Parts and Harness Connector Location ..... 9
Wiring Diagram — A/SUSP — ............................ ... 10
Basic Inspection .................................................. ... 12
AIR HOSES ...................................................... ... 12
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION ......................... ... 12
CK SUSP INDICATOR LAMP INSPECTION ... ... 12
CK SUSP Indicator Lamp Timing ........................ ... 12
Control Unit Input/Output Signal Standard .......... ... 12
CONSULT-II Function (AIR LEVELIZER) ............ ... 13
CONSULT-II OPERATION ............................... ... 13
SELF-DIAGNOSIS ........................................... ... 14
WORK SUPPORT ............................................ ... 15
DATA MONITOR .............................................. ... 16
ACTIVE TEST .................................................. ... 16
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS .................................................................... ... 18
Height Sensor System Inspection ....................... ... 18
Exhaust Valve Solenoid System Inspection ........ ... 19
Compressor Motor, Compressor Motor Relay and
Circuit Inspection ................................................. ... 21
TROUBLE DIAGNOSES FOR SYMPTOMS ......... ... 24Load Leveling Rear Air Suspension System Does
Not Operate ............................................................ 24
CK SUSP Indicator Lamp Stays On When Ignition
Switch Is Turned On ............................................
... 25
REAR SUSPENSION ASSEMBLY ........................... 26 Components ........................................................ ... 26
On-Vehicle Inspection and Service ...................... ... 27
SHOCK ABSORBER INSPECTION ................. ... 27
Wheel Alignment Inspection ................................ ... 28
PRELIMINARY INSPECTION .......................... ... 28
GENERAL INFORMATION AND RECOMMEN-
DATIONS .......................................................... ... 28
THE ALIGNMENT PROCESS .......................... ... 29
CAMBER .......................................................... ... 29
TOE-IN ............................................................. ... 29
REAR SUSPENSION MEMBER ............................... 31 Removal and Installation ..................................... ... 31
REMOVAL ........................................................ ... 32
INSPECTION AFTER REMOVAL .................... ... 33
INSTALLATION ................................................ ... 34
SHOCK ABSORBER ............................................. ... 35
Removal and Installation ..................................... ... 35
REMOVAL ........................................................ ... 35
INSTALLATION ................................................ ... 35
INSPECTION AFTER INSTALLATION ............. ... 35
SUSPENSION ARM ............................................... ... 36
Removal and Installation ..................................... ... 36
REMOVAL ........................................................ ... 36
INSPECTION AFTER REMOVAL .................... ... 36
INSTALLATION ................................................ ... 37
FRONT LOWER LINK ........................................... ... 38
Removal and Installation ..................................... ... 38
REMOVAL ........................................................ ... 38
INSPECTION AFTER REMOVAL .................... ... 38
INSTALLATION ................................................ ... 39
REAR LOWER LINK & COIL SPRING .................. ... 40
Removal and Installation ..................................... ... 40
REMOVAL ........................................................ ... 40
INSPECTION AFTER REMOVAL .................... ... 41
INSTALLATION ................................................ ... 41

RSU-12
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
Basic InspectionEES001H6
AIR HOSES
1. Check for pinched or damaged air hoses between the suspension air reservoir and each load leveling rear
air suspension shock absorber. Reposition, repair or replace hoses as necessary.
2. Check the air hose connections at the suspension air reservoir and at the shock absorbers for leaks. If connections are leaking, repair or replace hoses as necessary.
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.
CK SUSP INDICATOR LAMP INSPECTION
1. Make sure the CK SUSP indicator lamp turns on for approximately 2 seconds when the ignition switch is
turned ON. If it does not, check the combination meter. Refer to DI-5, "
COMBINATION METERS" .
2. Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp does not turn off, conduct self-diagnosis of the suspension control unit.
3. After conducting the self-diagnosis, be sure to erase the error memory. Refer to RSU-13, "
CONSULT-II
Function (AIR LEVELIZER)" .
CK SUSP Indicator Lamp TimingEES001H7
X: ON
—: OFF
Control Unit Input/Output Signal StandardEES001H8
ConditionCK SUSP
indicator lamp Remarks
Ignition switch OFF ––
Ignition switch ON X Turns off after approximately 2 seconds.
Te r m i n a l
No. Wire color
Item ConditionVoltage (V)
(Approx.)
1 V Compressor relay output
Ignition switch ON or STARTBattery voltage
3 W Height sensor signal input 0.2V - 4.8V
5 R Reference voltage 5V
6 G/R Ignition power
Battery voltage
7W /LB atte ry p ow er —
8 G/W Diagnostic K-line ——
9 SB Exhaust valve output Ignition switch ON or STARTBattery voltage
10 BR Warning lamp output ——
14 L Height sensor ground ——
15 BR/W Generator L signal input Engine running—
16 B Suspension control unit ground —0V

RSU-14
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
6. Select the required operation from the "SELECT DIAG MODE"
screen.
For further information, see the CONSULT-II Operation Manual.
SELF-DIAGNOSIS
Description
If an error is detected in the system, perform self-diagnosis as follows:
Operation Procedure
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
3. Turn ignition switch ON.
4. With the engine running, touch "START (NISSAN BASED VHCL)", "AIR LEVELIZER", "SELF-DIAG RESULTS" in order on the CONSULT-II screen.
CAUTION:
When "START (NISSAN BASED VHCL)" is touched immediately after starting the engine or turning
on the ignition switch, "AIR LEVELIZER" might not be displayed in the "SELECT SYSTEM" screen.
In this case, repeat the operation from step 4.
5. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by touching "COPY".)

When "NO DTC IS DETECTED" is displayed, check the CK SUSP indicator lamp.
6. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning component.
7. Start and run the vehicle for approximately 1 minute.
8. Turn ignition switch OFF to prepare for erasing the memory.
9. Start the engine and touch "START (NISSAN BASED VHCL)", "AIR LEVELIZER", "SELF-DIAG RESULTS", "ERASE" in order on the CONSULT-II screen to erase the error memory.
If "AIR LEVELIZER" is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the error memory is not erased, re-conduct the operation from step 7.
10. For the final inspection, start and run the vehicle for approximately 1 minute and confirm that the CK SUSP indicator lamp is off.
Display Item List
BCIA0031E
Self-diagnostic item Malfunction detecting condition Check system
Vehicle height sensor
[C1801] Vehicle height sensor voltage is less than 0.2V or greater than
4.8V for more than 60 seconds. Refer to
RSU-18, "
Height
Sensor System Inspection" .
Compressor relay
[C1802] 1. Driving transistor for compressor relay is off and monitor volt-
age continues high level for more than 10 seconds.
2. Driving transistor for compressor relay is on and monitor volt- age continues low level for more than 5 seconds. Refer to
RSU-21, "
Compres-
sor Motor, Compressor
Motor Relay and Circuit
Inspection" .
Exhaust solenoid
[C1803] 1. Driving transistor for exhaust solenoid is off and monitor volt-
age continues high level for more than 10 seconds.
2. Driving transistor for exhaust solenoid is on and monitor volt- age continues low level for more than 5 seconds. Refer to
RSU-19, "
Exhaust
Valve Solenoid System
Inspection" .

TROUBLE DIAGNOSISRSU-15
C
DF
G H
I
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K L
M A
B
RSU
Revision: November 2009 2006 QX56
WORK SUPPORT
Operation Procedure
1. After turning OFF the ignition switch, connect CONSULT-II and the CONSULT-II CONVERTER to the data
link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
2. Touch "START (NISSAN BASED VHCL)", "AIR LEVELIZER", "WORK SUPPORT" in order on the CON- SULT-II screen.
If "AIR LEVELIZER" is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
When "START (NISSAN BASED VHCL)" is touched immediately after starting the engine or turning
on the ignition switch, "AIR LEVELIZER" might not be displayed in the "SELECT SYSTEM" screen.
In this case, repeat the operation from step 2.
3. Select "STANDARD HEIGHT LEVEL", "ADJUST HEIGHT INI" or "CLEAR HEIGHT INI" on the "SELECT WORK ITEM" screen.
NOTE:
Read and perform screen instructions if "STANDARD HEIGHT LEVEL" or "ADJUST HEIGHT INI" is
selected.
4. Touch "START" to begin the desired work support.
Display Item List
Vehicle height adjusting trouble
(compressor)
[C1804] Continuous compressor relay ON time is more than 120 sec-
onds. Refer to
RSU-21, "Compres-
sor Motor, Compressor
Motor Relay and Circuit
Inspection" .
Vehicle height adjusting trouble
(exhaust solenoid)
[C1805] Continuous exhaust solenoid ON time is more than 120 seconds. Refer to
RSU-19, "
Exhaust
Valve Solenoid System
Inspection" .
Vehicle height sensor locking trou-
ble
[C1806] Output sensor voltage variation ±
0.02V is more than 100 hour
when vehicle height range is normal. Refer to
RSU-18, "
Height
Sensor System Inspection" .
Sensor 5V trouble
[C1807] Sensor reference voltage is less than 0.8V or more than 6V for
20 seconds. Refer to
RSU-18, "
Height
Sensor System Inspection" .
Integral time trouble by supplying
air
[C1808] Integral discontinuous time on the compressor is more than 180
seconds. Refer to
RSU-21, "
Compres-
sor Motor, Compressor
Motor Relay and Circuit
Inspection" .
Self-diagnostic item
Malfunction detecting condition Check system
ItemDescription Condition
STANDARD HEIGHT LEVEL Resets the vehicle height to the initialization flag
setting stored in the suspension control unit. Vehicle unladen
RSU-49, "
Wheelarch Height
(Unladen*1 )" , set in a horizontal position and
not moving.
NOTE:
Do not take your eyes off the vehicle while
CONSULT-II is processing.
ADJUST HEIGHT INI Sets the height initialization flag in the suspension
control unit when the control unit has been replaced
or when the initialization flag has been cleared
using the "CLEAR HEIGHT INI" procedure. Vehicle unladen
RSU-49, "
Wheelarch Height
(Unladen*1 )" . Move vehicle forward and
backward approx. 5 m (16.4 ft) and rock vehi-
cle from side to side.
NOTE:
Do not move vehicle while CONSULT-II is pro-
cessing.
CLEAR HEIGHT INI Clears the initialization flag in the suspension con-
trol unit. Vehicle unladen
RSU-49, "
Wheelarch Height
(Unladen*1 )" .