ignition INFINITI QX56 2006 Factory Service Manual

TROUBLE DIAGNOSISSRS-45
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SRS
Revision: November 2009 2006 QX56
Trouble Diagnosis: “AIR BAG” Warning Lamp Does Not Turn OnEHS0016W
DIAGNOSTIC PROCEDURE 7
1. CHECK METER FUSE
Check the 10A fuse [No. 14, located in the fuse block (J/B)].
Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. CHECK METER FUSE AGAIN
Replace 10A fuse [No. 14, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Repair harness.
No >> Inspection End.
3. CHECK HARNESS CONNECTION BETWEEN AIR BAG DIAGNOSIS SENSOR UNIT AND COMBINA-
TION METER Disconnect the air bag diagnosis sensor unit harness connectors and turn ignition switch ON.
Does
“AIR BAG” warning lamp turn on?
Yes >> Replace the air bag diagnosis sensor unit. Refer to SRS-58, "Removal and Installation" .
No >> Check the combination meter ground circuits.

SRS-46
DRIVER AIR BAG MODULE
Revision: November 20092006 QX56
DRIVER AIR BAG MODULEPFP:K8510
Removal and InstallationEHS0016X
REMOVAL
CAUTION:

Do not attempt to repair or replace damaged direct-connect SRS component connectors. If a
driver air bag direct-connect harness connector is damaged, the spiral cable must be replaced.

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.

When servicing the SRS, do not work from directly in front of air bag module.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Remove the left and right side lids and bolts.
3. Lift the driver air bag module from the steering wheel.
4. Disconnect the horn connector and air bag harness, then remove the driver air bag module.

For removal/installation of the direct-connect SRS connectors, refer to SRS-7, "Direct-connect SRS
Component Connectors" .
CAUTION:

When servicing the SRS, do not work from directly in front of air bag module.

Always place air bag module with pad side facing upward.

Do not insert any foreign objects (screwdriver, etc.) into air
bag module or harness connectors.

Do not disassemble air bag module.

Do not use old bolts after removal; replace with new bolts.

Do not expose the air bag module to temperatures exceed-
ing 90 °C (194 °F).
1. Horn harness 2. Steering wheel hook 3. Inflator harness
4. Side lids RH/LH 5. Driver air bag module 6. Steering wheel
WHIA0159E
LHIA0052E

SRS-48
SPIRAL CABLE
Revision: November 20092006 QX56
SPIRAL CABLEPFP:25554
Removal and InstallationEHS0016Y
REMOVAL
CAUTION:

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.

When servicing the SRS, do not work from directly in front of air bag module.
1. Remove the steering wheel. Refer to PS-7, "
STEERING WHEEL" .
2. Remove the column cover upper and lower.
3. Remove wiper and washer switch connector, then pinch the tabs at wiper and washer switch base and slide away from steering
column to remove.
WHIA0233E
1. Steering wheel 2. Lighting and turn signal switch 3. Wiper and washer switch
4. Spiral cable 5. Driver air bag module connector 6. Column cover upper
7. Column assembly 8. Column cover lower 9. Screw (Do not remove)
10. Screw
LHIA0034E

SRS-50
FRONT PASSENGER AIR BAG MODULE
Revision: November 20092006 QX56
FRONT PASSENGER AIR BAG MODULEPFP:K8515
Removal and InstallationEHS0016Z
The passenger air bag module originally installed in the vehicle uses direct-connect style harness connectors.
Service replacement passenger air bag modules use tab-locking style harness connectors. If the passenger
air bag module is replaced or if the direct-connect harness connectors are damaged, the vehicle wiring har-
ness must be modified to allow connection of the service replacement passenger air bag module. Refer to
SRS-51, "
WIRING HARNESS MODIFICATION" for wiring harness modification procedure.
REMOVAL
CAUTION:

Do not attempt to repair or replace damaged direct-connect front passenger air bag module con-
nectors. If a direct-connect harness connector is damaged, the front passenger air bag must be
replaced and the wiring harness modified.

Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.

Always work from the side of or under front passenger air bag module.
1. Remove the glove box. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
2. Remove 2 nuts (through glove box opening) retaining front pas- senger air bag module to instrument panel crossmember.
3. Disconnect the air bag module electrical connectors.

For removal/installation of the direct-connect SRS connec-
tors, refer to SRS-7, "
Direct-connect SRS Component Con-
nectors" .
4. Remove the instrument panel assembly from the vehicle. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
5. Remove front passenger air bag module nuts and remove air bag module from the instrument panel assembly.
CAUTION:

When servicing the SRS, do not work from directly in front
of air bag module.

Always place front passenger air bag module with caution
label side facing upward.

Do not insert any foreign objects (screwdriver, etc.) into air
bag module or harness connectors.

Do not disassemble air bag module.

Do not use old nuts after removal; replace with new nuts.

Do not expose the front passenger air bag module to tem-
peratures exceeding 90 °C (194 °F).

Replace the air bag module if it has been dropped or sus-
tained an impact.

Do not allow oil, grease or water to come in contact with the
air bag module.

For removal/installation of the direct-connect SRS connec-
tors, refer to SRS-7, "
Direct-connect SRS Component Con-
nectors" .
INSTALLATION
Original Passenger Air Bag Module
Installation is in the reverse order of removal.
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SBF814E

FRONT PASSENGER AIR BAG MODULESRS-51
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Revision: November 2009 2006 QX56

For removal/installation of the direct-connect SRS connectors, refer to SRS-7, "Direct-connect SRS Com-
ponent Connectors" .
CAUTION:

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
Service Replacement Passenger Air Bag Module
1. Install the front passenger air bag module to the instrument
panel pad assembly.
2. Install the instrument panel assembly. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
3. Connect the front passenger air bag module harness connector to yellow 4-pin service replacement air bag connector and fasten connector to mounting bracket.
CAUTION:

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
WIRING HARNESS MODIFICATION
The passenger air bag module originally installed in the vehicle uses direct-connect style harness connectors.
Service replacement passenger air bag modules use tab-locking style harness connectors. If the passenger
air bag module is replaced or if the direct-connect harness connectors are damaged, the vehicle wiring har-
ness must be modified to allow connection of the service replacement passenger air bag module.
NOTE:
The wiring harness modification is to be performed only if the vehicle is equipped with the original passenger
air bag which uses direct-connect harness connectors. If the passenger air bag is to be replaced in a vehicle
that has already had the service replacement passenger air bag installed, the wiring harness modification is
not required.
CAUTION:

Do not attempt to repair or replace damaged direct-connect front passenger air bag module con-
nectors. If a direct-connect harness connector is damaged, the front passenger air bag must be
replaced and the wiring harness modified.

Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
1. Locate the yellow and orange direct-connect passenger air bag module harness connectors.
2. Use wire cutters to cut back both previously used direct-connect passenger air bag module harness con- nectors from the vehicle wiring harness approximately 50 mm (1.9 in) from the connectors.
3. Remove approximately 150 mm (5.9 in) of the vehicle harness covering from the cut end.
WHIA0110E

SIDE CURTAIN AIR BAG MODULESRS-53
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Revision: November 2009 2006 QX56
SIDE CURTAIN AIR BAG MODULEPFP:985P0
Removal and InstallationEHS00171
REMOVAL
CAUTION:

Do not attempt to repair or replace damaged direct-connect SRS component connectors. If a
direct-connect harness connector is damaged, the harness must be replaced.

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.

When servicing the SRS, do not work from directly in front of air bag module.
1. Remove headlining. Refer to EI-38, "
Removal and Installation" .
2. Disconnect front and rear side curtain air bag module connectors.

For removal/installation of the direct-connect SRS connectors, refer to SRS-7, "Direct-connect SRS
Component Connectors" .
3. Remove the bolts in order starting at the front or rear, and remove the side curtain air bag module.
CAUTION:

When servicing the SRS, do not work from directly in front of air bag module.

Do not insert any foreign objects (screwdriver, etc.) into air bag module or harness connectors.

Do not disassemble air bag module.

Do not expose the air bag module to temperatures exceeding 90° C (194°F).

Replace side curtain air bag module if it has been dropped
or sustained an impact.

Do not allow oil, grease or water to come in contact with the
air bag module.
1. Rear side curtain air bag module
connector 2. Front side curtain air bag module
connector ⇐
Vehicle front
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SBF814E

CRASH ZONE SENSORSRS-55
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Revision: November 2009 2006 QX56
CRASH ZONE SENSORPFP:98531
Removal and InstallationEHS00172
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Remove front grille. Refer to EI-17, "
FRONT GRILLE" .
3. Disconnect the crash zone sensor harness connector.
4. Remove crash zone sensor nuts.
CAUTION:

Replace crash zone sensor if it has been dropped or sustained an impact.

Do not disassemble crash zone sensor.
INSTALLATION
Installation is in the reverse order of removal.

After the work is complete, perform self-diagnosis to check that no malfunction is detected. Refer to SRS-
20, "SRS Operation Check" .
LHIA0056E

SRS-56
SIDE AIR BAG (SATELLITE) SENSOR
Revision: November 20092006 QX56
SIDE AIR BAG (SATELLITE) SENSORPFP:98830
Removal and InstallationEHS00173
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Remove seat belt pre-tensioner. Refer to SB-3, "
Removal and
Installation of Front Seat Belt" .
3. Remove side air bag (satellite) sensor nuts.
4. Disconnect the side air bag (satellite) sensor harness connector.
CAUTION:

Do not use old nuts after removal; replace with new nuts.

Check side air bag (satellite) sensor to make sure it is free of deformities, dents, cracks or rust. If
it shows any visible signs of damage, replace it with new one.

Do not disassemble side air bag (satellite) sensor.

Replace side air bag (satellite) sensor if it has been dropped or sustained an impact.
INSTALLATION
Installation is in the reverse order of removal.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
LHIA0062E

SRS-58
DIAGNOSIS SENSOR UNIT
Revision: November 20092006 QX56
DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationEHS00175
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner.
3. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
4. Disconnect diagnosis sensor unit harness connectors.
5. Remove fixing bolts from the diagnosis sensor unit.
CAUTION:

Do not use old bolts; replace with new bolts.

Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace with new one.

Replace diagnosis sensor unit if it has been dropped or sustained an impact.
INSTALLATION
Installation is in the reverse order of removal.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
CAUTION:

The diagnosis sensor unit must always be installed with the arrow mark " ⇐" pointing toward the
front of the vehicle for proper operation.
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that the diagnosis sensor unit identification is correct for the
vehicle as equipped. Refer to SRS-18, "
CONSULT-II Function (AIR BAG)" .
LHIA0063E

TF-4
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS002H3
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 Transfer Assembly and Transfer Control Unit ReplacementEDS002H4
When replacing transfer assembly or transfer control unit, check the 4WD shift indicator lamp as follows.
1. Turn ignition switch “ON ”.
2. Check 4WD shift indicator lamp is turned ON for approx. 1 second.

If OK, the position between transfer assembly and transfer control unit is correct.

If NG, the position is different between transfer assembly and transfer control unit.
Adjust the position between transfer assembly and transfer control unit. Refer to TF-4, "
METHOD FOR
POSITION ADJUSTMENT" .
METHOD FOR POSITION ADJUSTMENT
1. Start engine. Run the engine for at least 10 seconds.
2. Stop vehicle and move A/T selector lever to “N” position with brake pedal depressed. Stay in "N" for at
least 2 seconds.
3. Turn 4WD shift switch to “2WD ” position. Stay in "2WD" for at least 2 seconds.
4. Turn ignition switch “ OFF”.
5. Start engine.
6. Erase self-diagnosis. Refer to TF-47, "
How to Erase Self-diagnostic Results" (with CONSULT-II) or TF-
53, "ERASE SELF-DIAGNOSIS" (without CONSULT-II).
7. Check 4WD shift indicator lamp. Refer to TF-32, "
CHECK BEFORE ENGINE IS STARTED" .
If 4WD shift indicator lamp does not indicate "2WD", install new transfer control unit and retry the above
check.
PrecautionsEDS002H5

Before connecting or disconnecting the transfer control
unit harness connector, turn ignition switch “OFF” and dis-
connect battery ground cable. Failure to do so may damage
the transfer control unit. Battery voltage is applied to trans-
fer control unit even if ignition switch is turned “OFF”.
SEF289H