2007 INFINITI QX56 air condition

SE-70
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
Check that when the A/T selector lever is in P position, “DETENT
SW” on the DATA MONITOR becomes OFF.
Without CONSULT-II
GO TO 2.
OK or NG
OK >> A/T device (park position switch) circuit is OK.
NG >> GO TO 2.
2.CHECK A/T DEVICE (PARK POSITION SWITCH) HARNESS
1. Turn ignition switch OFF.
2. Disconnect A/T device and driver seat control unit.
3. Check continuity between A/T device connector M203 terminal 6
and driver seat control unit connector P2 terminal 21.
4. Check continuity between A/T device connector M203 terminal 6
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK PARK POSITION SWITCH
Check continuity between A/T device (park position switch) terminals
as follows.
OK or NG
OK >> A/T device is OK.
NG >> Replace A/T device.
Steering Wheel Tilt Switch Circuit InspectionINFOID:0000000003533202
1.CHECK FUNCTION
With CONSULT-II
With “TILT SW-UP, TILT SW-DOWN” on the DATA MONITOR, oper-
ate the ADP steering wheel tilt switch to check ON/OFF operation.
Monitor item
[OPERATION or UNIT]Contents
DETENT SW“ON/
OFF”The A/T selector lever position “P position (OFF)/other
than P position (ON)” judged from the park position switch
signal is displayed.
PIIA0291E
6 - 21 : Continuity should exist.
6 - Ground : Continuity should not exist.
LIIA1024E
Terminals Condition Continuity
56P position No
Other than P position Yes
LIIA1491E
Monitor item [OPERATION or
UNIT]Contents
TILT SW-UP “ON/OFF”Operation (ON)/open (OFF) status
judged from the tilt switch (FR) signal is
displayed.
TILT SW-DOWN “ON/OFF”Operation (ON)/open (OFF) status
judged from the tilt switch (RR) signal is
displayed.
PIIA0315E

AUTOMATIC DRIVE POSITIONER
SE-71
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
SE
N
O
P
Without CONSULT-II
1. Turn ignition switch OFF.
2. Check voltage between automatic drive positioner control unit
connector and ground.
OK or NG
OK >> ADP steering wheel tilt switch circuit is OK.
NG >> GO TO 2.
2.CHECK ADP STEERING WHEEL TILT SWITCH HARNESS CONTINUITY
1. Disconnect automatic drive positioner control unit connector
and ADP steering wheel tilt switch.
2. Check continuity between automatic drive positioner control unit
connector M33 terminals 1, 17 and ADP steering wheel tilt
switch connector M16 terminals 2, 3.
3. Check continuity between automatic drive positioner control unit
connector M33 terminals 1, 17 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK ADP STEERING WHEEL TILT SWITCH
Check continuity between ADP steering wheel tilt switch terminals
as follows.
OK or NG
OK >> GO TO 4.
NG >> Replace ADP steering wheel tilt switch.
4.CHECK ADP STEERING WHEEL TILT SWITCH GROUND CIRCUIT
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M331
GroundTilt switch ON (UP operation) 0
Other than above 5
17Tilt switch ON (DOWN opera-
tion)0
Other than above 5
LIIA0491E
1 - 2 : Continuity should exist.
17 - 3 : Continuity should exist.
1 - Ground : Continuity should not exist.
17 - Ground : Continuity should not exist.
LIIA1434E
Terminals Condition Continuity
2
1Tilt switch ON (UP operation) Yes
Other than above No
3Tilt switch ON (DOWN operation) Yes
Other than above No
LIIA1435E

SE-72
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
Check continuity between ADP steering wheel tilt switch connector
M16 terminal 1 and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Replace or replace harness.
Front Door Switch LH Circuit InspectionINFOID:0000000003533203
1.CHECK FUNCTION
With CONSULT-II
Touch "BCM" with “DOOR SW-DR” on the DATA MONITOR, check
ON/OFF operation when the front door is open and closed.
*:Refer to SE-32, "CONSULT-II Function (AUTO DRIVE POS.)".
Without CONSULT-II
GO TO 2.
OK or NG
OK >> Front door switch LH circuit is OK.
NG >> GO TO 2.
2.CHECK FRONT DOOR SWITCH LH
1. Turn ignition switch OFF.
2. Disconnect front door switch LH.
3. Check continuity between front door switch LH terminal 2 and
exposed metal of switch while pressing and releasing switch.
OK or NG
OK >> GO TO 3.
NG >> Replace front door switch LH.
3.CHECK HARNESS CONTINUITY
1. Disconnect BCM.
2. Check continuity between BCM connector M19 terminal 47 and
front door switch LH connector B8 terminal 2.
3. Check continuity between BCM connector M19 terminal 47 and
ground.
OK or NG
OK >> Front door switch LH circuit is OK.
NG >> Repair or replace harness.1 - Ground : Continuity should exist.
LIIA0490E
Monitor item [OPERATION
or UNIT]Contents
DOOR SW DR*“ON/
OFF”Door open (ON)/door closed (OFF) status judged
from the front door switch is displayed.
PIIA0291E
Terminals Condition Continuity
2GroundWith the front door switch LH pressed No
With the front door switch LH released Yes
LIIA2377E
47 - 2 : Continuity should exist.
47 - Ground : Continuity should not exist.
LIIA1027E

SRS-6
< SERVICE INFORMATION >
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Front Seat Belt Pre-tensioner with Load Limiter
INFOID:0000000003532858
The seat belt pre-tensioner system with load limiter is installed for
both the driver's seat and the front passenger's seat. It operates
simultaneously with the SRS air bag system in the event of a frontal
collision with an impact exceeding a specified level.
When the frontal collision with an impact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the pre-tensioner. Vehicle passengers are
securely restrained.
When passengers in a vehicle are thrown forward in a collision and
the restraining force of the seat belt exceeds a specified level, the
load limiter permits the specified extension of the seat belt by the
twisting of the ELR shaft, and a relaxation of the chest-area seat belt
web tension while maintaining force.
Occupant Classification System (OCS)INFOID:0000000003532859
The occupant classification system (OCS) identifies different size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS receives inputs from the occupant classi-
fication sensor (located inside the passenger seat cushion assembly) and belt tension sensor (part of the pas-
senger front seat belt assembly and located at the belt anchor location). Depending on classification of the
passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit
uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the
passenger front air bag in the event of a collision. Depending on the signals received, the air bag diagnosis
sensor unit can disable the passenger front air bag completely.
NOTE:
In case of customer concern, CONSULT-II can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Conditions
NOTE:
Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
Direct-connect SRS Component ConnectorsINFOID:0000000003532860
The following SRS components use direct-connect style harness connectors.
• Driver air bag module
• Front passenger air bag module
• LH side front curtain air bag module
• LH side rear curtain air bag module
• RH side front curtain air bag module
• RH side rear curtain air bag module
• Front LH seat belt pre-tensioner
• Front RH seat belt pre-tensioner
• Seat belt buckle pre-tensioner assembly LH
WHIA0324E
Front Passenger Seat
(Condition)PASS AIR BAG OFF Indicator
(Status)Passenger Air Bag Status
(Readiness)CONSULT-II Display
Seat occupied OFF Active (enabled) ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
WHIA0187E

SRS-8
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000003532861
CAUTION:
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in
this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness con-
nectors.
• Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace it
with a new one.
• Keep ground connections clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function through the operation of the “AIR BAG” warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the “AIR BAG” warning lamp and CONSULT-II are as follows:
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT - Vehicle model
WHEN - Date, Frequencies
WHERE - Road conditions
HOW - Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.
• Battery (Refer to SC-4, "
How to Handle Battery" .)
• Fuse (Refer to SRS-12, "
Wiring Diagram - SRS -" .)
• System component-to-harness connections
WORK FLOW
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation
CONSULT-II — X Monitoring

TROUBLE DIAGNOSIS
SRS-21
< SERVICE INFORMATION >
C
D
E
F
G
I
J
K
L
MA
B
SRS
N
O
P
Warning lamp examples
Trouble Diagnosis with CONSULT-IIINFOID:0000000003532869
DIAGNOSTIC PROCEDURE 2
Refer to GI-36, "CONSULT-II Start Procedure" .
“AIR BAG” warning lamp operation-User mode- SRS condition Reference item
• No malfunction is detected.
• No further action is necessary.—
The system is malfunctioning and
needs to be repaired as indicated.Go to SRS-21, "
Trouble Diagnosis
with CONSULT-II" with CONSULT-
II or SRS-28, "
Trouble Diagnosis
without CONSULT-II" without CON-
SULT-II.
• Air bag is deployed.
• Seat belt pre-tensioner is deployed.
• Seat belt buckle pre-tensioner as-
sembly is deployed.Go to SRS-49
.
• Air bag diagnosis sensor unit is mal-
functioning.
• Air bag power supply circuit is mal-
functioning.
• SRS air bag warning lamp circuit is
malfunctioning.Go to SRS-32, "
Trouble Diagnosis:
"AIR BAG" Warning Lamp Does Not
Turn Off" .
• Air bag diagnosis sensor unit is mal-
functioning.
• Air bag warning lamp circuit is mal-
functioning.Go to SRS-33, "
Trouble Diagnosis:
"AIR BAG" Warning Lamp Does Not
Turn On" .
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E

TROUBLE DIAGNOSIS
SRS-33
< SERVICE INFORMATION >
C
D
E
F
G
I
J
K
L
MA
B
SRS
N
O
P
1.CHECK CONDITION OF AIR BAG MODULE
Inspect for any deployed air bag modules or seat belt pre-tensioners.
Are any air bag modules or seat belt pre-tensioners deployed?
Yes >> Refer to SRS-49 .
No >> GO TO 2.
2.CHECK THE AIR BAG FUSE
Check 10A fuse [No. 13, located in the fuse block (J/B)].
Refer to PG-3
.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.CHECK AIR BAG FUSE AGAIN
Replace 10A fuse [No. 13, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Repair harness.
No >> Inspection End.
4.CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Connect CONSULT-II and touch “START”.
Is
“AIR BAG” displayed on CONSULT-II?
Yes >> GO TO 5.
No >> Visually inspect the air bag diagnosis sensor unit har-
ness connections. If the connections are OK, replace
the air bag diagnosis sensor unit. Refer to SRS-47,
"Removal and Installation" .
5.CHECK HARNESS CONNECTION
Check for loose connections between the combination meter and the air bag diagnosis sensor unit.
OK or NG
OK >> Replace air bag diagnosis sensor unit. Refer to SRS-47, "Removal and Installation" .
NG >> Properly connect the combination meter and air bag diagnosis sensor unit harness connectors. If
“AIR BAG” warning lamp still does not turn off, replace the wiring harness.
Trouble Diagnosis: "AIR BAG" Warning Lamp Does Not Turn OnINFOID:0000000003532872
DIAGNOSTIC PROCEDURE 8
1.CHECK METER FUSE
Check the 10A fuse [No. 14, located in the fuse block (J/B)] .
Refer to PG-3
.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.REPLACE METER FUSE AND CHECK AGAIN
Replace 10A fuse [No. 14, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Replace harness.
No >> Inspection End.
BCIA0030E

TROUBLE DIAGNOSIS
TF-35
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
TF
N
O
P
• 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.
Transfer Control Unit Input/Output Signal Reference ValueINFOID:0000000003532526
TRANSFER CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II
Monitored item [Unit] Content Condition Display value
VHCL/S SEN·FR [km/h]
or [mph]Front wheel speedVehicle stopped 0 km/h (0 MPH)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition.Approximately
equal to the indica-
tion on speedome-
ter (Inside of
±10%)
VHCL/S SEN·RR [km/h]
or [mph]Rear wheel speedVehicle stopped 0 km/h (0 MPH)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition.Approximately
equal to the indica-
tion on speedome-
ter (Inside of
±10%)
ENGINE SPEED [rpm] Engine speedEngine stopped
(Engine speed: Less than 400 rpm)0 rpm
Engine running
(Engine speed: 400 rpm or more)Approximately
equal to the indica-
tion on tachometer
THRTL POS SEN [V]Accelerator pedal posi-
tion (APP) sensor signal
voltageAccelerator pedal: Release Approx. 0.5V
Accelerator pedal: Fully depressed Approx. 4.0V
FLUID TEMP SE [V]Transfer fluid tempera-
ture signal voltageTransfer fluid temperature approx. 20 - 80°C (68 - 176°F) Approx. 1.1 - 0.3V
BATTERY VOLT [V]Power supply voltage for
transfer control unitIgnition switch: ON Battery voltage
2WD SWITCH [ON/OFF]Input condition from 4WD
shift switch4WD shift switch: 2WD ON
4WD shift switch: AUTO, 4H or 4LO OFF
AUTO SWITCH [ON/
OFF]Input condition from 4WD
shift switch4WD shift switch: AUTO ON
4WD shift switch: 2WD, 4H or 4LO OFF
LOCK SWITCH [ON/
OFF]Input condition from 4WD
shift switch4WD shift switch: 4H ON
4WD shift switch: 2WD, AUTO or 4LO OFF
4L SWITCH [ON/OFF]Input condition from 4WD
shift switch4WD shift switch: 4LO ON
4WD shift switch: 2WD, AUTO or 4H OFF
N POSI SW TF [ON/
OFF]Condition of neutral-4LO
switch• Vehicle stopped
• Engine running
• A/T selector lever “N” posi-
tion
• Brake pedal depressed4WD shift switch: 2WD,
AUTO or 4HOFF
4WD shift switch: 4H to
4LO (While actuator mo-
tor is operating.)OFF → ON
4WD shift switch: 4LO to
4H (While actuator motor
is operating.)ON → OFF
4WD shift switch: 4LO ON