Infiniti G37 Coupe. Manual — part 1281
PRECAUTIONS
STC-175
< PRECAUTION >
[WITH 4WAS]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001751302
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 AIRBAG” and “SEAT BELT” of this
Service Manual.
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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
• 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 har-
ness connectors.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000001751536
NOTE:
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1.
Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2.
Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3.
Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4.
Perform the necessary repair operation.
5.
When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6.
Perform self-diagnosis check of all control units using CONSULT-III.
Precautions for Removal and Installation of 4WAS Components
INFOID:0000000001666501
• Set the vehicle to the straight-ahead position when checking 4WAS and removing each component.
• Remove the battery terminal 10 minutes after turning the ignition switch OFF from ON and perform the
removal of each component when removing the 4WAS front control unit.
STC-176
< PRECAUTION >
[WITH 4WAS]
PRECAUTIONS
• Perform the neutral position adjustment for the steering angle sensor after the replacement of steering angle
sensor. Refer to
BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special
• Refer to
STC-27, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Description"
for the
replacement of 4WAS front control unit.
• Refer to
STC-27, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Description"
for the
replacement of 4WAS front actuator.
Precautions for Harness Repair
INFOID:0000000001666502
4WAS COMMUNICATION LINE
• Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
• Bypass connection is never allowed at the repaired area.
NOTE:
Bypass connection may cause 4WAS communication error as
spliced wires that are separate from the main line or twisted lines
lose noise immunity.
• Replace the applicable harness as an assembly if error is detected
on the shield lines of 4WAS communication line.
SKIB8766E
SKIB8767E
4WAS FRONT CONTROL UNIT
STC-177
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
4WAS FRONT CONTROL UNIT
Exploded View
INFOID:0000000001666503
Removal and Installation
INFOID:0000000001666504
REMOVAL
1.
Turn the ignition switch OFF.
2.
Remove the instrument driver lower panel. Refer to
.
3.
Disconnect 4WAS front control unit connectors.
CAUTION:
Disconnect 4WAS front control unit connectors 10 minutes after turning the ignition switch OFF.
4.
Remove the bolts of 4WAS front control unit.
5.
Remove the 4WAS front control unit (1).
INSTALLATION
Note following, and install in the reverse order of removal.
• Perform 4WAS front actuator adjustment after replacing 4WAS front control unit. Refer to
FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 3)"
1.
4WAS front control unit
:Vehicle front
Refer to
JSGIA0261ZZ
JSGIA0058ZZ
STC-178
< ON-VEHICLE REPAIR >
[WITH 4WAS]
4WAS MAIN CONTROL UNIT
4WAS MAIN CONTROL UNIT
Exploded View
INFOID:0000000001666505
Removal and Installation
INFOID:0000000001666506
1.
Turn the ignition switch OFF.
2.
Remove the rear wheel house finisher. Refer to
.
3.
Disconnect 4WAS main control unit connectors, 4WAS rear motor relay connector and noise suppressor
connectors.
4.
Remove the 4WAS main control unit bolt and nuts.
5.
Remove the 4WAS main control unit (1).
INSTALLATION
Install in the reverse order of removal.
1.
4WAS main control unit
:Vehicle front
Refer to
for symbols in the figure.
JSGIA0238ZZ
JSGIA0239ZZ
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