2006 INFINITI QX56 abs

A/T CONTROL SYSTEMAT-35
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Revision: November 2009 2006 QX56
Lock-up Applied

In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the
torque converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
SMOOTH LOCK-UP CONTROL
When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the
torque converter clutch is temporarily set to the half-clutched state to reduce the shock.
Half-clutched State

The current output from the TCM to the torque converter clutch solenoid is varied to gradually increase
the torque converter clutch solenoid pressure.
In this way, the lock-up apply pressure gradually rises and while the torque converter clutch piston is put
into half-clutched status, the torque converter clutch piston operating pressure is increased and the cou-
pling is completed smoothly.
Slip Lock-up Control

In the slip region, the torque converter clutch solenoid current is controlled with the TCM to put it into the
half-clutched state. This absorbs the engine torque fluctuation and lock-up operates from low speed.
This raises the fuel efficiency for 4th and 5th gears at both low speed and when the accelerator has a low
degree of opening.

TROUBLE DIAGNOSISAT-91
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Revision: November 2009 2006 QX56
ATF PRES SW 6 (ON-OFF display)XXX (for HLR/C solenoid)
PNP SW 1 (ON-OFF display) X— X
PNP SW 2 (ON-OFF display) X— X
PNP SW 3 (ON-OFF display) X— X
PNP SW 4 (ON-OFF display) X— X
SLCT LVR POSI —XX Selector lever position is recognized by the
TCM.
For fail-safe operation, the specific value used
for control is displayed.
1 POSITION SW (ON-OFF display) X— X 1st position switch
OD CONT SW (ON-OFF display) X— X 4th position switch
POWERSHIFT SW (ON-OFF display) X —X
Not mounted but displayed.
HOLD SW (ON-OFF display)
X— X
MANU MODE SW (ON-OFF display) X— X
NON M-MODE SW (ON-OFF display) X —X
UP SW LEVER (ON-OFF display) X— X
DOWN SW LEVER (ON-OFF display) X —X
SFT UP ST SW (ON-OFF display) ——X
SFT DWN ST SW (ON-OFF display) ——X
ASCD-OD CUT (ON-OFF display) ——X
ASCD-CRUISE (ON-OFF display) ——X
ABS SIGNAL (ON-OFF display) ——X
ACC OD CUT (ON-OFF display) ——X
ICC (Intelligent cruise control)
ACC SIGNAL (ON-OFF display) ——X
TCS GR/P KEEP (ON-OFF display) ——X
TCS SIGNAL 2 (ON-OFF display) ——X
TCS SIGNAL 1 (ON-OFF display) ——X
TCC SOLENOID (A) —XX
LINE PRES SOL (A) —XX
I/C SOLENOID (A) —XX
FR/B SOLENOID (A) —XX
D/C SOLENOID (A) —XX
HLR/C SOL (A) —XX
ON OFF SOL (ON-OFF display) ——X LC/B solenoid
TCC SOL MON (A) ——X
L/P SOL MON (A) ——X
I/C SOL MON (A) ——X
FR/B SOL MON (A) ——X
D/C SOL MON (A) ——X
HLR/C SOL MON (A) ——X
ONOFF SOL MON (ON-OFF display) ——X LC/B solenoid
P POSI IND (ON-OFF display) ——X
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU
INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU

PRECAUTIONSATC-5
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Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EJS003WO
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 Working with HFC-134a (R-134a)EJS003WP
WARNING:

CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer to AT C - 5 , "
Contaminated Refrigerant" . To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use recovery/recycling
equipment and refrigerant identifier.

Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
If oil other than that specified is used, compressor failure is likely to occur.

The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
–When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
–When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possi-
ble to minimize the entry of moisture into system.
–Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
–Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting
requirements of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a)
recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming
service. Additional health and safety information may be obtained from refrigerant and oil manu-
facturers.
–Do not allow oil, NISSAN A/C System Oil Type S (DH-PS) or equivalent, to come in contact with sty-
rofoam parts. Damage may result.
Contaminated RefrigerantEJS003WQ
If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant
into the atmosphere.

Explain that recovery of the contaminated refrigerant could damage your service equipment and refriger-
ant supply.

Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.

TELEPHONEAV-73
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Revision: November 2009 2006 QX56
Removal and InstallationEKS00GBR
BLUETOOTH CONTROL UNIT
Removal
1. Disconnect battery negative terminal.
2. Remove front passenger seat. Refer to SE-91, "
FRONT SEAT" .
3. Remove Bluetooth control unit kick shield screws (A) and remove bluetooth control unit kick shield (1).
4. Disconnect Bluetooth control unit harness connectors.
5. Remove Bluetooth control unit screws (B).
6. Remove Bluetooth control unit (2) from bluetooth control unit bracket.
Installation
Installation is in the reverse order of removal.
NOTE:
When replacing bluetooth control unit, Perform pairing procedure. Refer to Owner's Manual Pairing Proce-
dure.
BLUETOOTH ON INDICATOR
Removal
CAUTION:
To avoid damage use care when removing console finisher.

Sunroof switch (2).

Microphone (3).

Front personal/map lamp LH (4).

Interior lamp switch (5).

Front personal/map lamp RH (6).
1. Remove console assembly, roof finisher.
2. Release Bluetooth ON indicator tabs.
3. Disconnect Bluetooth ON indicator connector.
4. Remove Bluetooth ON indicator (1).
Installation
Installation is in the reverse order of removal.
MICROPHONE
Removal
CAUTION:
To avoid damage use care when removing console finisher.

Bluetooth on indicator (1).

Sunroof switch (2).
LKIA0681E
LKIA0667E

AV-74
TELEPHONE
Revision: November 20092006 QX56

Front personal/map lamp LH (4).

Interior lamp switch (5).

Front personal/map lamp RH (6).
1. Remove console assembly, roof finisher.
2. Release microphone tabs.
3. Disconnect microphone connector.
4. Remove microphone (3).
Installation
Installation is in the reverse order of removal.
LKIA0667E

BODY REPAIRBL-165
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Revision: November 2009 2006 QX56
Corrosion ProtectionEIS004TA
DESCRIPTION
To provide improved corrosion prevention, the following anti-corrosive measures have been implemented in
NISSAN production plants. When repairing or replacing body panels, it is necessary to use the same anti-cor-
rosive measures.
ANTI-CORROSIVE PRECOATED STEEL (GALVANNEALED STEEL)
To improve repairability and corrosion resistance, a new type of anti-
corrosive precoated steel sheet has been adopted replacing conven-
tional zinc-coated steel sheet.
Galvannealed steel is electroplated and heated to form Zinc-iron
alloy, which provides excellent and long term corrosion resistance
with cationic electrode position primer.
Nissan Genuine Service Parts are fabricated from galvannealed steel. Therefore, it is recommended that
GENUINE NISSAN PARTS or equivalent be used for panel replacement to maintain the anti-corrosive perfor-
mance built into the vehicle at the factory.
PHOSPHATE COATING TREATMENT AND CATIONIC ELECTRODEPOSITION PRIMER
A phosphate coating treatment and a cationic electrode position primer, which provide excellent corrosion pro-
tection, are employed on all body components.
CAUTION:
Confine paint removal during welding operations to an absolute
minimum.
Nissan Genuine Service Parts are also treated in the same manner. Therefore, it is recommended that GENU-
INE NISSAN PARTS or equivalent be used for panel replacement to maintain anti-corrosive performance built
into the vehicle at the factory.
PIIA0093E
PIIA0095E

BODY REPAIRBL-187
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Revision: November 2009 2006 QX56
Handling Precautions for PlasticsEIS004TE
HANDLING PRECAUTIONS FOR PLASTICS
1. When repairing and painting a portion of the body adjacent to plastic parts, consider their characteristics
(influence of heat and solvent) and remove them if necessary or take suitable measures to protect them.
2. Plastic parts should be repaired and painted using methods suiting the materials
, characteristics.
Abbre- viation Material name Heat resisting
temperature °C ( °F) Resistance to gasoline and
solvents Other cautions
PE Polyethylene 60 (140)Gasoline and most solvents are
harmless if applied for a very
short time (wipe up quickly). Flammable
PVC Polyvinyl Chloride 80 (176) Same as above. Poison gas is emitted
when burned.
EPM/
EPDM Ethylene Propylene (Diene) rub-
ber
80 (176) Same as above.
Flammable
TPO/
TPR Thermoplastic Olefine/
Thermoplastic Rubber
80 (176) Same as above.
Flammable
PP Polypropylene 90 (194) Same as above. Flammable, avoid bat-
tery acid.
UP Polyester thermoset 90 (194) Same as above. Flammable
PS Polystyrene 80 (176) Avoid solvents. Flammable
ABS Acrylonitrile Butadiene Styrene
resin
80 (176) Avoid gasoline and solvents.
AES Acrylonitrile Ethylene Styrene 80 (176) Same as above.
PMMA Polymethyl Methacrylate 85 (185) Same as above.
AAS Acrylonitrile Acrylic Styrene 85 (185) Same as above.
AS Acrylonitrile Styrene 85 (185) Same as above.
EVA Polyvinyl Ethyl Acetate 90 (194) Same as above.
ASA Acrylonitrile Styrene Acrylate 100 (222) Same as above. Flammable
PPO/
PPE Polyphenylene Oxide/
Polyphenylene Ether
110 (230) Same as above.
PC Polycarbonate 120 (248) Same as above.
PAR Polyacrylate 180 (356) Same as above.
L-
LDPE Lenear Low Density PE
45 (100)Gasoline and most solvents are
harmless. Flammable
PUR Polyurethane 90 (194) Same as above.
TPU Thermoplastic Urethane 110 (230) Same as above.
PPC Polypropylene Composite 115 (239) Same as above. Flammable
POM Polyacetal 120 (248) Same as above. Avoid battery acid.
PBT+P
C Polybutylene Terephtha-
late+Polycarbonate
120 (248) Same as above.
Flammable
PA Polyamide (Nylon) 140 (284) Same as above. Avoid immersing in wa-
ter.
PBT Polybutylene Terephthalate 140 (284) Same as above.
FRP Fiber Reinforced Plastics 170 (338) Same as above. Avoid battery acid.
PET Polyethylene Terephthalate 180 (356) Same as above.
PEI Polyetherimide 200 (392) Same as above.

PRECAUTIONSBR-3
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Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS004VW
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 Brake SystemEFS004VX

Always use recommended brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas.

To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

Use flare nut wrench when removing and installing brake tube.

Always check tightening torque when installing brake lines.

Before working, turn ignition switch to OFF and disconnect con-
nectors for ABS actuator and electric unit (control unit) or battery
terminals.

Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage.
Refer to BR-25, "
BRAKE BURNISHING PROCEDURE" .
WARNING:

Clean brake pads and shoes with a waste cloth, then wipe
with a dust collector.SBR686C