INFINITI QX56 2007 Factory Service Manual

TROUBLE DIAGNOSIS
SRS-31
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SRS-32
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Trouble Diagnosis: "AIR BAG" Warning Lamp Does Not Turn Off
INFOID:0000000003532871
DIAGNOSTIC PROCEDURE 7
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WHIA0212E

TROUBLE DIAGNOSIS
SRS-33
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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

SRS-34
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
3.CHECK HARNESS CONNECTIONS BETWEEN AIR BAG DIAGNOSIS SENSOR UNIT AND COMBINA-
TION METER
Inspect the harness and connectors between the air bag diagnosis sensor unit and the combination meter.
Do the harness or connectors have any visible damage?
Yes >> Replace harness.
No >> GO TO 4.
4.CHECK COMBINATION 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-47, "Removal and Installation" .
No >> Replace the combination meter. Refer to IP-10, "
Removal and Installation" .

DRIVER AIR BAG MODULE
SRS-35
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DRIVER AIR BAG MODULE
Removal and InstallationINFOID:0000000003532873
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-6, "
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 exceeding
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-36
< SERVICE INFORMATION >
DRIVER AIR BAG MODULE
• 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.
INSTALLATION
Installation is in the reverse order of removal.
• If driver air bag module is being replaced due to deployment, spiral cable must also be replaced. Refer to
SRS-37
.
• For removal/installation of the direct-connect SRS connectors, refer to SRS-6, "
Direct-connect SRS Compo-
nent Connectors" .
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRS-
20, "SRS Operation Check" .
SBF814E

SPIRAL CABLE
SRS-37
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SPIRAL CABLE
Removal and InstallationINFOID:0000000003532874
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
.
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.
4. While pressing tabs, pull lighting and turn signal switch toward
driver door and disconnect from base.
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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
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LHIA0035E

SRS-38
< SERVICE INFORMATION >
SPIRAL CABLE
5. Remove the screws, release the clip, and remove the spiral
cable.
CAUTION:
• Do not disassemble spiral cable.
• Do not apply lubricant to the spiral cable.
6. Remove the spiral cable connectors.
CAUTION:
With the steering linkage disconnected, the spiral cable may snap by turning the steering wheel
beyond the limited number of turns. The spiral cable can be turned counterclockwise about 2.5
turns from the neutral position.
INSTALLATION
Installation is in the reverse order of removal.
• Align spiral cable correctly when installing steering wheel. Make
sure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.5 revolutions from the right
end position and ending with the knob at the top.
• If equipped with VDC, refer to BRC-54, "
Adjustment of Steering
Angle Sensor Neutral Position" for steering angle sensor adjust-
ment.
• After the work is completed, perform self-diagnosis to make sure
no malfunction is detected. Refer to SRS-20, "
SRS Operation
Check" .
CAUTION:
• The spiral cable may snap due to steering operation if the
cable is not installed in the correct position.
• With the steering linkage disconnected, the cable may snap
by turning the steering wheel beyond the limited number of
turns. The spiral cable can be turned counterclockwise about
2.5 turns from the right end position.
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FRONT PASSENGER AIR BAG MODULE
SRS-39
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FRONT PASSENGER AIR BAG MODULE
Removal and InstallationINFOID:0000000003532875
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
"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 connec-
tors. 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
.
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 connectors,
refer to SRS-6, "
Direct-connect SRS Component Connectors"
.
4. Remove the instrument panel assembly from the vehicle. Refer
to IP-10
.
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 tempera-
tures 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-6, "
Direct-connect SRS Component Con-
nectors" .
INSTALLATION
Original Passenger Air Bag Module
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SRS-40
< SERVICE INFORMATION >
FRONT PASSENGER AIR BAG MODULE
Installation is in the reverse order of removal.
• For removal/installation of the direct-connect SRS connectors, refer to SRS-6, "
Direct-connect SRS Compo-
nent 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
.
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 connec-
tors. 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