1999 SUZUKI GRAND VITARA Service Workshop Manual

YH4
GRAND
VITARA
AIR BAG SYSTEM 10B-55
ON-VEHICLE SERVICE
SERVICE PRECAUTIONS
SERVICE AND DIAGNOSIS
WARNING/CAUTION labels are attached on each part of air bag system components (SDM, air bag (inflator) mod-
ules and seat belt pretensioners). Be sure to follow the instructions.
WARNING:

If the air bag system and another vehicle system both need repair, Suzuki recommends that the air
bag system be repaired first, to help avoid unintended air bag system activation.

Do not modify the steering wheel, dashboard or any other air bag system components. Modifications
can adversely affect air bag system performance and lead to injury.

Failure to follow procedures could result in possible air bag system activation, personal injury or un-
needed air bag system repairs.

Many of service procedures require disconnection of ªAIR BAGº fuse and air bag (inflator) modules (driver and
passenger) from initiator circuit to avoid an accidental deployment.

Do not apply power to the air bag system unless all components are connected or a diagnostic chart requests
it, as this will set a diagnostic trouble code.

The ªAir Bag Diagnostic System Checkº must be the starting point of any air bag diagnostics. The ªAir Bag Diag-
nostic System Checkº will verify proper ªAIR BAGº warning lamp operation and will lead you to the correct chart
to diagnose any air bag malfunctions. Bypassing these procedures may result in extended diagnostic time, incor-
rect diagnosis, and incorrect parts replacements.

Never use air bag component parts from another vehicle.

If the vehicle will be exposed to temperatures over 93
C (200
F) (for example, during a paint baking process),
remove the air bag system components beforehand to avoid component damage or unintended system activa-
tion.

When servicing, if shocks may be applied (eg., dropped from a height of 90 cm (3 ft) or more) to air bag system
component parts, remove those parts beforehand.

When using electric welding, be sure to disconnect air bag (inflator) module and seat belt pretensioner connec-
tors (driver and passenger) respectively.

When applying paint around the air bag system related parts, use care so that the harness or connector will not
be exposed to the paint mist.

Never expose air bag system component parts directly to hot air (drying or baking the vehicle after painting) or
flames.
WARNING:
When performing service on or around air bag system components or air bag wiring, follow the proce-
dures listed in the following pages to temporarily disable the air bag system. Refer to appropriate ser-
vice manual procedures. Failure to follow procedures could result in possible air bag system activa-
tion, personal injury or unneeded air bag system repairs.

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VITARA
1. Air bag harness
2. ªAIR BAGº monitor coupler
3. Yellow connector of contact coil and combination
switch assembly
4. Yellow connector of passenger air bag (inflator) module
5. Steering support member
1. Air bag harness
2. ªAIR BAGº monitor coupler
3. Yellow connector of contact coil and combination
switch assembly
10B-56 AIR BAG SYSTEM
DISABLING AIR BAG SYSTEM
1) Turn steering wheel so that vehicle's wheels (front tires) and
pointing straight ahead.
2) Turn ignition switch to ªLOCKº position and remove key.
3) Remove ªAIR BAGº fuse from ªAIR BAGº fuse box.
4) Disconnect Yellow connector of contact coil and combination
switch assembly.
ii) Release locking of lock lever.
ii) After unlocked, disconnect to connector.
5) Pull out glove box while pushing its stopper from both right and
left sides and disconnect Yellow connector of passenger air bag
(inflator) module.
ii) Release locking of lock lever.
ii) After unlocked, disconnect to connector.
NOTE:
With ªAIR BAGº fuse removed and ignition switch ON, ªAIR
BAGº warning lamp will be ON.
This is normal operation and does not indicate an air bag
system malfunction.
ENABLING AIR BAG SYSTEM
1) Turn ignition switch to ªLOCKº and remove key.
2) Connect Yellow connector of contact coil and combination
switch assembly, and be sure to lock connector with lock lever.
ii) Connect connector.
ii) Lock connector with lock lever.

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1. Yellow connector of passenger air bag (inflator) module
2. Steering support member
3. Air bag harness
AIR BAG SYSTEM 10B-57
3) Connect Yellow connector of passenger air bag (inflator) mod-
ule, and be sure to lock connector with lock lever.
ii) Connect connector.
ii) Lock connector with lock lever.
4) Install glove box.
5) Install ªAIR BAGº fuse to ªAIR BAGº fuse box.
6) Turn ignition switch to ON and verify that ªAIR BAGº warning
lamp flashes 6 times and then turns off.
If it does not operate as described, perform ªAir Bag Diagnostic
System Checkº in this section.
HANDLING AND STORAGE
SDM
WARNING:
Never power up air bag system when SDM is not rigidly at-
tached to the vehicle. Otherwise, personal injury may result.
CAUTION:
After detecting one time of such collision as to meet deploy-
ment conditions, the SDM must not be used.
Refer to ªDiagnosisº when checking the SDM.

Never attempt disassembly of SDM.

When storing SDM, select a place where neither high tempera-
ture nor high humidity is anticipated and oil, water and dust are
kept off.

If SDM was dropped from a height of 90 cm (3 ft) or more or if it
is found to be damaged or deformed, replace it with a new one.

If installation part of SDM was damaged, repair that part com-
pletely before reinstallation.

All SDM and mounting bracket fasteners must be carefully
torqued and the arrow must be pointed toward the front of the ve-
hicle to ensure proper operation of the air bag system.

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ALWAYS CARRY AIR BAG (INFLATOR) MODULE
WITH TRIM COVER (AIR BAG OPENING) AWAY
FROM BODY.
10B-58 AIR BAG SYSTEM
LIVE (UNDEPLOYED) AIR BAG (INFLATOR) MODULES
Special care is necessary when handling and storing a live (unde-
ployed) air bag (inflator) modules.
The rapid gas generation produced during deployment of the air
bag could cause the air bag (inflator) module, or an object in front
of the air bag (inflator) module, to be thrown through the air in the
unlikely event of an accidental deployment.
WARNING:
Never attempt to measure the resistance of the air bag (in-
flator) modules (driver and passenger). It is very dangerous
as the electric current from the tester may deploy the air
bag.

Never attempt disassembly of the air bag (inflator) modules.

If any abnormality is found, be sure to replace it with new one as
an assembly.

When an abnormality is noted as existing in the live (undeployed)
air bag (inflator) module, be sure to deploy it before discarding it.

When grease, cleaning agent, oil, water, etc., got on the air bag
(inflator) modules (driver and passenger), wipe it off immediately
with a dry cloth.

If air bag (inflator) module was dropped from a height of 90 cm (3
ft) or more, it should be replaced with a new one as an assembly.
WARNING:

For handling and storage of a live air bag (inflator) module,
select a place where the ambient temperature below 65
C
(150
F), without high humidity and away from electric
noise.

When carrying a live air bag (inflator) module, make sure
the bag opening is pointed away from you. In case of an
accidental deployment, the bag will then deploy with mini-
mal chance of injury. Never carry the air bag (inflator)
module by the wires or connector on the underside of the
module.
Otherwise, personal injury may result.

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ALWAYS PLACE AIR BAG (INFLATOR) MODULE
ON WORKBENCH WITH TRIM COVER (AIR BAG
OPENING) UP, AWAY FROM LOOSE OBJECTS.
1. Slit on workbench
2. Workbench vise
3. Lower mounting bracket
2-1. Webbing
2-2. Retractor assembly
2-1. Seat belt pretensioner
2-2. Seat belt pretensioner harness
2-2
AIR BAG SYSTEM 10B-59
WARNING:
When placing a live air bag (inflator) module on bench or
other surface, always face the bag up, away from the sur-
face. As the live passenger air bag (inflator) module must be
placed with its bag (trim cover) facing up, place it on the
workbench with a slit or use the workbench vise to hold it
securely at its lower mounting bracket.
It is also prohibited to place anything on top of the trim cov-
er and stack air bag (inflator) modules.
This is necessary so that a free space is provided to allow
the air bag to expand in the unlikely event of accidental de-
ployment.
Otherwise, personal injury may result.
LIVE (INACTIVATED) SEAT BELT PRETENSIONERS
Special care is necessary when handling and storing a live (inacti-
vated) seat belt pretensioners.
Also, when the seat belt pretensioners activate, gas is generated
and the seat belt is retracted into the retractor quickly.
Note, therefore, that if they activate accidentally, the seat belt pre-
tensioners and other object(s) around them may be thrown through
the air.
WARNING:
Never attempt to measure the resistance of the seat belt pre-
tensioners. It is very dangerous as the electric current from
the tester may activate pretensioner.

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VITARA
1. Exhaust hole
1 1
NG
10B-60 AIR BAG SYSTEM

Never attempt to disassemble the seat belt pretensioners (retrac-
tor assembly).

If any abnormality is found, be sure to replace it with new one as
an assembly.

When an abnormality is noted as existing in the live (inactivated)
seat belt pretensioner, be sure to activate it before discarding it.

When grease, cleaning agent oil, water, etc., got on the seat belt
pretensioners (retractor assembly), wipe it off immediately with a
dry cloth.

If seat belt pretensioner was dropped from a height of 30 cm (1
ft) or more, it should be replaced with a new one as an assembly.
WARNING:

For handling and storage of a live seat belt pretensioner,
select a place where the ambient temperature below 65
C
(150
F), without high humidity and away from electric
noise.

Never carry the seat belt pretensioner by the wires or con-
nector on the underside of the pretensioner.

When placing a live seat belt pretensioner on the work-
bench or some place like that, be sure not to lay it with its
exhaust hole provided side facing down. It is also prohib-
ited to put something on its face with an exhaust hole or
to put a seat belt pretensioner on top of another.
Otherwise, personal injury may result.

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VITARA
AIR BAG SYSTEM 10B-61
DEPLOYED AIR BAG (INFLATOR) MODULES
WARNING:

The air bag (inflator) module immediately after deploy-
ment is very hot. Wait for at least 30 minutes to cool it off
before proceeding the work.

Do not apply water, oil, etc. to deployed air bag (inflator)
module.

After an air bag (inflator) module has been deployed, the
surface of the air bag may contain a powdery residue. This
powder consists primarily of cornstarch (used to lubri-
cate the bag as it inflates) and byproducts of the chemical
reaction. As with many service procedures, gloves and
safety glasses should be worn.

Wash your hands with mild soap and water after complet-
ing the work.
Refer to the procedure described under ªDeployed Air Bag (Inflator)
Modules Disposalº in this section.
ACTIVATED SEAT BELT PRETENSIONERS
WARNING:

The seat belt pretensioner immediately after activation is
very hot. Wait for at least 30 minutes to cool it off before
proceeding the work.

Do not apply water, oil, etc. to activated seat belt preten-
sioner.

With many service procedures, gloves and safety glasses
should be worn to prevent any possible irritation of the
skin or eyes.

Wash your hands with mild soap and water after complet-
ing the work.
Refer to the procedure described under ªActivated Seat Belt Pre-
tensioners Disposalº in this section.

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VITARA
10B-62 AIR BAG SYSTEM
1. Air bag wire harness
2. Ground
3. SDM case ground
AIR BAG WIRE HARNESS AND CONNECTORS
Air bag wire harness can be identified easily as it is covered with a
yellow protection tube. Be very careful when handling it.

When an open in air bag wire harness, damaged wire harness,
connector or terminal is found, replace wire harness, connectors
and terminals as an assembly.

When installing it, be careful so that the air bag wire harness is not
caught or does not interfere with other parts.

Make sure all air bag system grounding points are clean and
grounds are securely fastened for optimum metal-to-metal con-
tact. Poor grounding can cause intermittent problems that are dif-
ficult to diagnose.
DISPOSAL
Do not dispose of the live (undeployed) air bag (inflator) modules
and the live (inactivated) seat belt pretensioners. When disposal is
necessary, be sure to deploy the air bag according to deployment
procedure described under ªAir Bag (Inflator) Modules Disposalº
and to activate the pretensioner according to activation procedure
described under ªSeat Belt Pretensioners Disposalº.
WARNING:
Failure to follow proper air bag (inflator) module and seat
belt pretensioner disposal procedures can result in air bag
deployment and pretensioner activation which could cause
personal injury. Undeployed air bag (inflator) module and
inactivated seat belt pretensioner must not be disposed of
through normal refuse channels.
The undeployed air bag (inflator) module and inactivated
seat belt pretensioner contain substances that can cause
severe illness or personal injury if the sealed container is
damaged during disposal.