2006 INFINITI QX56 light

BL-146
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
*: CONSULT-II self-diagnostic results display screen “no malfunction is detected ”.
DIAGNOSTIC SYSTEM DIAGRAM
Symptom Diagnostic Procedure
(Reference page) System
(Malfunctioning part or mode) Reference Part No. Of Illustra-
tion On System Diagram
Security indicator does not light
up*. PROCEDURE 6
(BL-154
) Combination meter (security
indictor lamp)
—
Open circuit between fuse and
BCM —
BCM A
WIIA0550E

BL-154
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
Diagnostic Procedure 6EIS0061U
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
1. CHECK FUSE
Check 10A fuse [No.19, located in the fuse block (J/B)]
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK SECURITY INDICATOR LAMP
1. Start engine and turn ignition switch OFF.
2. Check the security indicator lamp lights up.
OK or NG
OK >> Inspection End.
NG >> GO TO 3.
3. CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Disconnect security indicator lamp.
2. Check voltage between security indicator lamp connector M24 terminal 8 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK BCM (NATS CONTROL UNIT) FUNCTION
1. Connect security indicator lamp.
2. Disconnect BCM.
3. Check voltage between BCM connector M18 terminal 23 and ground.
OK or NG
OK >> BCM is malfunctioning.

Replace BCM. Ref. part No. A

Perform initialization with CONSULT-II.

For initialization, refer to “CONSULT-II Operation
Manual NATS-IVIS/NVIS ”.
NG >> Check the following:

Harness for open or short between security indicator lamp and BCM (NATS control unit).

Indicator lamp condition
Security indicator lamp should light up.
8 - Ground
:Battery voltage
LIIA1072E
23 - Ground :Battery voltage
LIIA0523E

HOMELINK UNIVERSAL TRANSCEIVERBL-157
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Revision: November 2009 2006 QX56
Trouble DiagnosesEIS0061X
DIAGNOSTIC PROCEDURE
SYMPTOM: Transmitter does not activate receiver.
Before conducting the procedure given below, make sure that system receiver (garage door opener, etc.)
operates with original, hand-held transmitter. If NG, receiver or hand-held transmitter is malfunctioning, not
vehicle related.
1. ILLUMINATE CHECK

Turn ignition switch OFF.

Does amber light (LED) of transmitter illuminate when any but-
ton is pressed?
YES or NO
YES >> GO TO 2.
NO >> GO TO 3.
2. TRANSMITTER CHECK
Check transmitter with Tool.*
*For details, refer to Technical Service Bulletin.
OK or NG
OK >> Receiver or hand-held transmitter malfunction, not vehicle related.
NG >> Replace transmitter.
3. POWER SUPPLY CHECK
1. Disconnect transmitter.
2. Check voltage between Homelink ® universal transceiver connector R106 terminal 1 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace fuse or harness.
LIIA1466E
1 - Ground : Battery voltage
LIIA1467E

BRC-4
[VDC/TCS/ABS]
PRECAUTIONS
Revision: November 20092006 QX56

If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis results?

If YES, GO TO 3.

If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica- tion. Therefor, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to BRC-10, "
CAN COMMUNICATION" .
Precautions for Brake ControlEFS004X6

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnosis. Besides electrical system inspection, check booster operation, brake fluid level, and fluid leaks.

If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.

If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.

If the following components are replaced with non-genuine components or modified, the VDC OFF indica-
tor lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs, bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, rotors, calipers, etc.), components related to engine
(muffler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).

Driving with broken or excessively worn suspension components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
operate properly.

When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.

When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp curves on a freeway), the VDC may not operate normally, or the VDC warning lamp and the SLIP
indicator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the
engine.

Sudden turns (such as spin turns, acceleration turns), drifting, etc. with VDC turned off may cause the yaw
rate/side G sensor to indicate a problem. This is not a problem if normal operation can be resumed after
restarting the engine.
Precautions for CAN SystemEFS004X7

Do not apply voltage of 7.0V or higher to terminal to be measured.

Maximum open terminal voltage of tester in use must be less than 7.0V.

Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: November 20092006 QX56
ABS FunctionEFS004XC

The Anti-Lock Brake System detects wheel revolution while braking and improves handling stability during
sudden braking by electrically preventing wheel lockup. Maneuverability is also improved for avoiding
obstacles.

If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and
the ABS warning lamp turns on.

The electrical system can be diagnosed using CONSULT-II.

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
EBD FunctionEFS004XD

Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure
which results in reduced rear wheel slippage.

If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoper-
ative, and the ABS warning lamp and BRAKE warning lamp are turned on.

The electrical system can be diagnosed using CONSULT-II.

During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
TCS FunctionEFS004XE

Spinning of the drive wheels is detected by the ABS actuator and electric unit (control unit) using inputs
from the wheel speed sensors. If wheel spin occurs, the drive wheel right and left brake fluid pressure
control and engine fuel cut are activated while the throttle value is restricted to reduce the engine torque
and decrease the amount of wheel spin. In addition, the throttle opening is controlled to achieve the opti-
mum engine torque.

Depending on road condition, the vehicle may have a sluggish feel. This is normal, because optimum trac-
tion has the highest priority during TCS operation.

TCS may be activated during sudden vehicle acceleration, wide open throttle acceleration, sudden trans-
mission shifts or when the vehicle is driven on a road with a varying surface friction coefficient.

The SLIP indicator lamp flashes to inform the driver of TCS operation.
VDC FunctionEFS004XF

In addition to the ABS/TCS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and front and rear pressure sensors, and the vehicle's driving status
(amount of under steering/over steering) is determined using inputs from the yaw rate sensor/side G sen-
sor, wheel speed sensors, etc. and this information is used to improve vehicle stability by controlling the
braking and engine torque application to the wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the vehicle body and brake pedal may vibrate lightly and a mechanical noise may
be heard. This is normal.

The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while the
engine is running or on a steep slope. In this case, restart the engine on a normal road and if the ABS
warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off, there is no problem.
Fail-Safe FunctionEFS004XG
CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS/TCS/VDC system.

CO-2Revision: November 2009
PRECAUTIONS
2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00RE2
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Liquid GasketEBS00RE3
REMOVAL OF LIQUID GASKET SEALING

After removing the bolts and nuts, separate the mating surface
and remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.

Tap the seal cutter to insert it.

In areas where the Tool is difficult to use, lightly tap to slide it.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application surface and the mating surface using suitable tool.

Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign material.Tool number
: KV10111100 (J-37228)
WBIA0566E
PBIC0003E

CO-12Revision: November 2009
ENGINE COOLANT
2006 QX56
4. Install the Tool by installing the radiator cap adapter onto theradiator neck opening. Then attach the gauge body assembly
with the refill tube and the venturi assembly to the radiator cap
adapter.
5. Insert the refill hose into the coolant mixture container that is placed at floor level. Make sure the ball valve is in the closed
position.

Use Genuine NISSAN Long Life Anti-freeze coolant or equiv-
alent, mixed 50/50 with distilled water or demineralized water.
Refer to MA-12, "
ANTI-FREEZE COOLANT MIXTURE
RATIO" .
6. Install an air hose to the venturi assembly, the air pressure must be within specification.
CAUTION:
The compressed air supply must be equipped with an air
dryer.
7. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open the ball valve on the refill hose slightly. Coolant will be visible ris-
ing in the refill hose. Once the refill hose is full of coolant, close the ball valve. This will purge any air
trapped in the refill hose.
8. Continue to draw the vacuum until the gauge reaches 28 inches of vacuum. The gauge may not reach 28 inches in high altitude
locations, refer to the vacuum specifications based on the alti-
tude above sea level.
9. When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for any leaks.
10. Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove the Tool from the radiator neck opening and install the radiator cap.
12. Remove the non-vented reservoir cap.
13. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system and top up the system as necessary before installing the vented reservoir cap.
FLUSHING COOLING SYSTEM
1. Drain the water from the engine cooling system. Refer to CO-11, "DRAINING ENGINE COOLANT" .
2. Fill the radiator and the reservoir tank (to the “MAX ” line), with water. Reinstall the radiator cap and leave
the vented reservoir cap off.
3. Run the engine until it reaches normal operating temperature. Cooling system capacity
(with reservoir)
: Refer to
MA-11, "
Fluids
and Lubricants" .
Compressed air
supply pressure : 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm
2 ,
80 - 120 psi)
LLIA0058E
Altitude above sea level Vacuum gauge reading
0 - 100 m (328 ft) : 28 inches of vacuum
300 m (984 ft) : 27 inches of vacuum
500 m (1,641 ft) : 26 inches of vacuum
1,000 m (3,281 ft) : 24 - 25 inches of vacuum
LLIA0057E

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION
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Revision: November 2009 2006 QX56
PRECAUTION .......................................................
..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
PREPARATION ...................................................... ..... 4
Commercial Service Tool .................................... ..... 4
COMBINATION METERS ...................................... ..... 5
System Description ............................................. ..... 5
UNIFIED METER CONTROL UNIT ................. ..... 5
POWER SUPPLY AND GROUND CIRCUIT ... ..... 6
WATER TEMPERATURE GAUGE ................... ..... 6
ENGINE OIL PRESSURE GAUGE .................. ..... 6
A/T OIL TEMPERATURE GAUGE ................... ..... 6
VOLTAGE GAUGE ........................................... ..... 6
TACHOMETER ................................................ ..... 6
FUEL GAUGE ....................................................... 6
SPEEDOMETER .............................................. ..... 6
CAN COMMUNICATION SYSTEM DESCRIP-
TION ................................................................. ..... 6
Component Parts and Harness Connector Location ..... 7
Combination Meter .............................................. ..... 8
CHECK ............................................................. ..... 8
Schematic ........................................................... ..... 9
Wiring Diagram — METER — ............................. ... 10
Terminals and Reference Value for Combination
Meter ................................................................... ... 12
Meter/Gauge Operation and Odo/Trip Meter ...... ... 13
SELF-DIAGNOSIS FUNCTION ....................... ... 13
HOW TO INITIATE COMBINATION METER
SELF- DIAGNOSIS MODE .............................. ... 13
COMBINATION METER SELF-DIAGNOSIS
MODE FUNCTIONS ........................................ ... 13
How to Proceed With Trouble Diagnosis ............. ... 17
Diagnosis Flow .................................................... ... 17
Power Supply and Ground Circuit Inspection ..... ... 18
Symptom Chart ................................................... ... 19
Vehicle Speed Signal Inspection ......................... ... 19
Engine Oil Pressure Signal Inspection ................ ... 19
Water Temperature Signal Inspection ................. ... 21
Engine Speed Signal Inspection ......................... ... 21Fuel Level Sensor Unit Inspection .......................
... 22
FUEL LEVEL SENSOR UNIT .......................... ... 22
LOW-FUEL WARNING LAMP .......................... ... 22
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies ................................................................... ... 24
Fuel Gauge Does Not Move to Full-position ........ ... 24
Electrical Components Inspection ....................... ... 25
FUEL LEVEL SENSOR UNIT CHECK ............. ... 25
Removal and Installation of Combination Meter .. ... 25
COMPASS AND THERMOMETER ........................ ... 26
System Description .............................................. ... 26
OUTSIDE TEMPERATURE DISPLAY .............. ... 26
DIRECTION DISPLAY ...................................... ... 26
Wiring Diagram — COMPAS — .......................... ... 27
Trouble Diagnoses .............................................. ... 28
PRELIMINARY CHECK FOR THERMOMETER ... 28
INSPECTION/COMPASS AND THERMOME-
TER .................................................................. ... 28
Calibration Procedure for Compass .................... ... 29
CORRECTION FUNCTIONS OF COMPASS ... ... 29
INITIAL CORRECTION PROCEDURE FOR
COMPASS ........................................................ ... 30
WARNING LAMPS ................................................. ... 31
Schematic ............................................................ ... 31
Wiring Diagram — WARN — ............................... ... 32
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) .......................................................... ... 38
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ............................................. ... 40
A/T INDICATOR ..................................................... ... 41
Wiring Diagram — AT/IND — .............................. ... 41
A/T Indicator Does Not Illuminate ........................... 42
WARNING CHIME .................................................. ... 43
Component Parts and Harness Connector Location ... 43
System Description .............................................. ... 44
FUNCTION ....................................................... ... 44
IGNITION KEY WARNING CHIME .................. ... 44
LIGHT WARNING CHIME ................................ ... 44
SEAT BELT WARNING CHIME ........................ ... 44
CAN Communication System Description ........... ... 45