2006 INFINITI QX56 light

TROUBLE DIAGNOSISTF-49
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Revision: November 2009 2006 QX56
WORK SUPPORT
When there is no problem with transfer and 4WD system, following symptom in “AUTO” mode may be claimed
by a customer.

Vibration when accelerating on a low µ road (snow-covered or icy road)
It is possible to deal with these symptoms by changing “CLUTCH FORCE RELEASE LIMIT VALUE”.
However, be careful when changing the values because it may adversely affect driving performance.
NOTE:
A slight shock is felt at a few hertz as if it were being pushed lightly from behind.
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE ”. Refer to TF-44, "CONSULT-II SETTING PROCEDURE"
.
2. Touch “WORK SUPPORT ”.
3. Select from “CLUTCH/F RLS LIM ADJ ”, screen of data monitor mode is displayed.
T/F F SPEED [km/h] or [mph] ×–×Displayed, but do not use.
A/T R SPEED [km/h] or [mph] ×–×Output shaft revolution signal (Revolution
sensor) calculated by TCM.
Signal input with CAN communication line.
AT GEAR POSI [1/2/3/4/5] ×–×A/T actual gear position is displayed.
Voltage [V] ––×The value measured by the voltage probe is
displayed.
Frequency [Hz] ––×
The value measured by the pulse probe is
displayed.
DUTY-HI (high) [%]
––×
DUTY-LOW (low) [%] ––×
PLS WIDTH-HI [msec] ––×
PLS WIDTH-LOW [msec] ––×
Monitored item (Unit)
Monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELEC-
TION FROM MENU

TF-130
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
Heavy Tight-corner Braking Symptom OccursEDS002HT
SYMPTOM:
Heavy tight-corner braking symptom occurs when vehicle is driven in AUTO mode and steering wheel
is turned fully to either side.
DIAGNOSTIC PROCEDURE
NOTE:

Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not
a malfunction.

Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift
switch is "4H" or "4LO", steering wheel is turned fully to either side.
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-50, "
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)" .
Is "CAN COMM CIRCUIT [U1000]" displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-113, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to TF-62, "
4WD Shift Switch" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self diagnosis for ECM. Refer to EC-49, "
Emission-related Diagnostic Information" .
Is any malfunction deteced by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4. CHECK SYSTEM FOR CLUTCH PRESSURE SOLENOID
Perform trouble diagnosis for clutch pressure solenoid system. Refer to TF-105, "
Clutch Pressure Switch" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 6.
6. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 7.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

TF-180
TRANSFER ASSEMBLY
Revision: November 20092006 QX56
18. Apply liquid gasket to the entire center case mating surface of
the front case assembly as shown.

Use Genuine Anaerobic Liquid Gasket or equivalent.
Refer to GI-46, "
RECOMMENDED CHEMICAL PRODUCTS
AND SEALANTS" .
CAUTION:
Remove all foreign materials such as water, oil and grease
from center case and front case mating surfaces.
19. Install the center case assembly to the front case assembly. CAUTION:
Do not damage mainshaft end.
20. Tap the center case lightly and press-fit the front drive shaft bearing into the front case.
21. Tighten the front case bolts to the specified torque. Refer to TF-
146, "COMPONENTS" .
CAUTION:
Be sure to install harness bracket and air breather hose
clamp.
22. Install the drain plug with a new gasket. CAUTION:
Do not reuse gasket.
23. Align the matching mark on the front drive shaft with the mark on the companion flange, then install the companion flange.
WDIA0157E
SDIA2138E
SDIA2100E
SDIA2779E

WW-2Revision: November 20092006 QX56
Preliminary Inspection .........................................
... 40
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .......................................... ... 40
CONSULT-II Function (BCM) ............................... ... 42
CONSULT-II OPERATION ................................ ... 42
DATA MONITOR ............................................... ... 43
ACTIVE TEST .................................................. ... 43
Rear Wiper Does Not Operate ............................... 44
Rear Wiper Stop Position Is Incorrect .................. ... 46
Only Rear Wiper Does Not Operate ....................... 47
Only Rear Wiper Intermittent Does Not Operate . ... 48
Wiper Does Not Wipe When Rear Washer Operates ... 48
Rear Wiper Arm ................................................... ... 49
REMOVAL AND INSTALLATION ...................... ... 49
INSTALLATION ................................................. ... 49
Rear Wiper Motor ................................................... 50 REMOVAL AND INSTALLATION ...................... ... 50
REMOVAL ........................................................ ... 50
INSTALLATION ................................................ ... 50
Rear Washer Nozzle Adjustment ......................... ... 50
Rear Washer Tube Layout ................................... ... 51Rear Washer Nozzle ............................................
... 51
REMOVAL AND INSTALLATION ...................... ... 51
INSTALLATION ................................................ ... 51
Removal and Installation ...................................... ... 51
REAR WIPER AND WASHER SWITCH ........... ... 51
WASHER FLUID RESERVOIR ......................... ... 52
WASHER MOTOR ............................................ ... 52
POWER SOCKET .................................................. ... 53
Wiring Diagram — P/SCKT — ............................. ... 53
Front Power Socket LH, Rear Cargo Power Socket ... 54
REMOVAL AND INSTALLATION ...................... ... 54
INSTALLATION ................................................ ... 54
Front Power Socket RH (For Cigarette Lighter),
Console Power Socket ......................................... ... 54
REMOVAL ........................................................ ... 54
INSTALLATION ................................................ ... 54
HORN ..................................................................... ... 55
Wiring Diagram — HORN — ............................... ... 55
Removal and Installation ...................................... ... 56
REMOVAL ......................................................... ... 56
INSTALLATION ................................................. ... 56

FRONT WIPER AND WASHER SYSTEMWW-11
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Revision: November 2009 2006 QX56
Terminals and Reference Values for BCMEKS00BDX
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(Approx.)
Ignition
switch Operation or condition
2 SB Combination switch input 5 ON

Light switch and wiper switch OFF

Wiper dial position 4
3 G/Y Combination switch input 4 ON

Light switch and wiper switch OFF

Wiper dial position 4
4 Y Combination switch input 3 ON

Light switch and wiper switch OFF

Wiper dial position 4
5 G/B Combination switch input 2 ON

Light switch and wiper switch OFF

Wiper dial position 4
6 V Combination switch input 1
32 R/G Combination switch output 5 ON

Light switch and wiper switch OFF

Wiper dial position 4
33 R/Y Combination switch output 4 ON

Light switch and wiper switch OFF

Wiper dial position 4
34 L Combination switch output 3 ON

Light switch and wiper switch OFF

Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

WW-12
FRONT WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
Terminals and Reference Values for IPDM E/R EKS00BDY
Work FlowEKS00BDZ
1. Confirm the trouble symptom or customer complaint.
2. Understand the system description, refer to WW-4, "
System Description" .
3. Perform preliminary inspection, refer to WW-12, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does wiper function operate normally? If it operates normally, GO TO 6. If not, GO TO 4.
6. Inspection End.
Preliminary InspectionEKS00BE0
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
35 O/B Combination switch output 2
ON

Light switch and wiper switch OFF

Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON— Battery
39 L CAN-H ON——
40 P CAN-L ON——
67 B Ground —— 0
70 W/B Battery power OFF— Battery
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(Approx.)
Ignition
switch Operation or condition
SKIA5292E
Terminal
No. Wire
color Signal name Measuring condition
Reference value (V)
(Approx.)
Ignition
switch Operation or condition
32 L Low speed signal ON Wiper switchOFF
0
LO Battery
35 L/B High speed signal ON Wiper switchOFF
0
HI Battery
38 B Ground —— 0
39 L CAN-H ON——
40 P CAN-L ON——
43 L/Y Wiper auto stop signal ON Wiper operating
Battery
Wiper stopped 0
59 B Ground —— 0
UnitPower source Fuse No.
Front and rear washer motor Ignition switch ON or START 9
Front wiper relay Battery39
BCM Ignition switch ON or START
59
Battery f

WW-38
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
Terminals and Reference Values for BCMEKS00BEE
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(Approx.)
Ignition
switch Operation or condition
2 SB Combination switch input 5 ON

Light switch and wiper switch OFF

Wiper dial position 4
3 G/Y Combination switch input 4 ON

Light switch and wiper switch OFF

Wiper dial position 4
4 Y Combination switch input 3 ON

Light switch and wiper switch OFF

Wiper dial position 4
5 G/B Combination switch input 2 ON

Light switch and wiper switch OFF

Wiper dial position 4
6 V Combination switch input 1 ON
26 Y/L Rear wiper auto stop
switch 2
ONRise up position (rear wiper arm on
stopper) 0V
A Position (full clockwise stop position) 0V
Forward sweep (counterclockwise direction) Fluctuating
B Position (full counterclockwise stop position) Battery voltage
Reverse sweep (clockwise direction) Fluctuating
32 R/G Combination switch output 5 ON

Light switch and wiper switch OFF

Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

REAR WIPER AND WASHER SYSTEMWW-39
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Revision: November 2009 2006 QX56
33 R/Y Combination switch output 4 ON
Light switch and wiper switch OFF

Wiper dial position 4
34 L Combination switch output 3 ON

Light switch and wiper switch OFF

Wiper dial position 4
35 O/B Combination switch output 2 ON

Light switch and wiper switch OFF

Wiper dial position 4
36 R/W Combination switch output 1 ON
38 W/L Ignition switch (ON) ON— Battery voltage
42 GR Glass hatch ajar switch
signal ONHatch glass closed
Battery voltage
Hatch glass open 0V
44 O Rear wiper auto stop
switch 1 ONRise up position (rear wiper arm on
stopper) 0V
A Position (full clockwise stop position) Battery voltage
Forward sweep (counterclockwise direction) Fluctuating
B Position (full counterclockwise stop position) 0V
Reverse sweep (clockwise direction) Fluctuating
54 Y Rear wiper output circuit 2 ON Rise up position (rear wiper arm on
stopper) 0V
A Position (full clockwise stop position) 0V
Forward sweep (counterclockwise direction) 0V
B Position (full counterclockwise stop position) Battery voltage
Reverse sweep (clockwise direction) Battery voltage
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(Approx.)
Ignition
switch Operation or condition
SKIA5292E
SKIA5291E
SKIA5292E