1999 SUZUKI GRAND VITARA ECU

YH4
GRAND
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.

YH4
GRAND
VITARA
1. SDM
2. SDM connector
3. SDM plate
4. SDM cover
1. Air bag wire harness
2. Ground
3. SDM case ground
AIR BAG SYSTEM 10B-65

Passenger air bag (inflator) module
± Check for dents, cracks, damage or fitness.
± Check trim cover for cracks or deformities.
± Check harness and connector for damage or tightness.
If any faulty condition is found in above checks, replace.

SDM and SDM plate
± Check for external damage such as deformation, scratch,
crack, peeled paint, etc.
± Check whether SDM can installed properly due to a cause in it-
self. (There is a gap between SDM and SDM plate, or it cannot
be fixed securely.)
± Check whether connector or lead wire of SDM has a scorching,
melting or damage.
± Check whether connector can be connected securely or locked.
± Check SDM connector and terminals for tightness.
± Check SDM sets a diagnostic trouble code and the diagnostic
table leads to a malfunctioning SDM.
If any faulty condition is found in above checks, replace.

Air bag wire harness and connections
± Check for damages, deformities or poor connections.
(Refer to ªIntermittent And Poor Connectionsº in this section.)
± Check wire harness clamps for tightness.
If any faulty condition is found, correct or replace.

YH4
GRAND
VITARA
1. SDM
2. SDM bolt
3. SDM cover
4. SDM connector
5. Arrow
1. Front center console box
2. Center garnish panel
3. Ashtray
4. Radio hole cover
5. Clock assembly
10B-68 AIR BAG SYSTEM
INSTALLATION
1) Check that none of following faulty conditions exists.

Bend, scratch, deformity in vehicle body mounted on SDM

Foreign matter or rust on mating surface of vehicle body
mounted on SDM
2) Install SDM (with SDM plate) to vehicle.
CAUTION:
Ensure that arrow on the SDM is pointing toward the front
of the vehicle.
3) Tighten SDM bolts to specified torque.
Tightening Torque
(a): 6.0 N´m (0.6 kg-m, 4.5 lb-ft)
4) Connect SDM connector to SDM securely.
5) Install tuner assembly, clock assembly, tuner pocket, radio hole
cover, etc. and ashtray.
6) Install center garnish panel.
7) Install front and rear center console box.
8) Connect negative cable to battery.
9) Enable air bag system. Refer to ªEnabling Air Bag Systemº earli-
er in this section.

YH4
GRAND
VITARA
1. Passenger air bag (inflator) module
2. Instrument panel
3. Glove box
1. Glove box
2. Push
3. Pull
AIR BAG SYSTEM 10B-69
PASSENGER AIR BAG (INFLATOR) MODULE
WARNING:

Never attempt to disassemble or repair the passenger air bag (inflator) module. If any abnormality is
found, be sure to replace it with new one as an assembly.

Be sure to read ªService Precautionsº in this section before starting to work and observe every pre-
caution during work. Neglecting them may result in personal injury or undeployment of the air bag
when necessary.
REMOVAL
1) Disconnect negative battery cable at battery.
2) Disable air bag system. Refer to ªDisabling Air Bag Systemº ear-
lier in this section.
3) Open glove box, then while pressing glove box stopper, pull out
glove box from instrument panel.
4) Remove glove box from instrument panel.
5) Remove passenger air bag (inflator) module attaching bolts and
screws, and passenger air bag (inflator) module from vehicle.
WARNING:

When carrying a live air bag (inflator) module, make
sure the bag opening is pointed away from you.
Never carry air bag (inflator) module by wires or con-
nector on the side of the module. In case of an acciden-
tal deployment, the bag will then deploy with minimal
chance of injury.

As the live passenger air bag (inflator) module must be
kept with its bag (trim cover) facing up while being
stored or left standing, place it on the workbench with
a slit or use the workbench vise to hold it securely at its
lower mounting bracket. This is necessary so that a
free space is provided to allow the air bag to expand in
the unlikely event of accidental deployment.

Observe ªService Precautionsº earlier in this section
for handling and storing it.
Otherwise personal injury may result.

YH4
GRAND
VITARA
1. Shorted
1. Slit on workbench
2. Workbench vise
3. Lower mounting bracket
ALWAYS CARRY AIR BAG (INFLATOR) MODULE
WITH TRIM COVER (AIR BAG OPENING) AWAY
FROM BODY.
ALWAYS PLACE AIR BAG (INFLATOR) MODULE
ON WORKBENCH WITH TRIM COVER (AIR BAG
OPENING) UP, AWAY FROM LOOSE OBJECTS.
10B-72 AIR BAG SYSTEM
1) Turn ignition switch to ªLOCKº, remove key and put on safety
glasses.
2) Check that there is no open, short or damage in special tool (de-
ployment harness). If any faulty is found, do not use it and be
sure to use new deployment harness.
Special Tool
(A): 09932-75030
3) Short the two deployment harness leads together by fully seat-
ing one banana plug into the other.
WARNING:
Deployment harness shall remain shorted and not be
connected to a power source until the air bag is to be
deployed.
Special Tool
(A): 09932-75030
4) Remove driver or passenger air bag (inflator) module from ve-
hicle, referring to SECTION 3C1 or 10B.
WARNING:

Always carry live air bag (inflator) module with trim cov-
er away from you.

When storing a live air bag (inflator) module or when
leaving a live air bag (inflator) module unattended on a
bench or other surface, always face the bag and trim
cover up and away from the surface. As the live passen-
ger 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.
This is necessary so that a free space is provided to al-
low the air bag to expand in the unlikely event of acci-
dental deployment.
Failure to follow procedures may result in personal inju-
ry.
5) Temporarily place driver or passenger air bag (inflator) module
on the workbench or the vise according to above WARNING.

YH4
GRAND
VITARA
AIR BAG SYSTEM 10B-73
1. Driver air bag (inflator) module
2. Trim cover must face up
3. 185 cm (6 ft) of clearance
1. Trim cover must face up
2. 185 cm (6 ft) of clearance
3. Mounting attachment
4. Bag opening side
5. M8 bolt and nut
6. Hold-down bolt and nut
(B)
6) [In case of Driver Air Bag (Inflator) Module]
ii) Clear a space on the ground about 185 cm (6 ft) in diameter
where the driver air bag (inflator) module is to be deployed.
A paved, outdoor location where there is no activity is pre-
ferred. If an outdoor location is not available, a space on the
shop floor where there is no activity and sufficient ventilation
is recommended.
Ensure no loose or flammable objects are within the deploy-
ment area.
ii) Place the driver air bag (inflator) module, with its vinyl trim
cover facing up, on the ground in the space just cleared.
[In case of Passenger Air Bag (Inflator) Module]
iii) Clear a space on the ground about 185 cm (6 ft) in diameter
where the fixture (special tool) with attached air bag (inflator)
module is to be placed for deployment. A paved outdoor loca-
tion where there is no activity is preferred. If an outdoor loca-
tion is not available, a space on the shop floor where there is
no activity and sufficient ventilation is recommended. Ensure
that no loose or flammable objects are within the deployment
area.
iii) Place special tool (passenger air bag (inflator) module de-
ployment fixture) on the ground in the space cleared in step
i), if it has not already been placed there.
Special Tool
(B): 09932-75040
iii) Fill plastic reservoir in fixture (special tool) with water or sand.
This is necessary to provide sufficient stabilization of the fix-
ture during deployment.
iv) Securely attach the passenger air bag (inflator) module in the
fixture (special tool) using mounting attachment, hold-down
bolts and nuts and M8 bolts and nuts.
CAUTION:
Be sure to use the following bolt and nut for fixing pas-
senger air bag (inflator) module to mounting attach-
ment. Size: M8, Strength: 7T
Passenger air bag (inflator) module must be mounted so that
the bag will deploy upward. Securely tighten all fastener prior
to deployment.

YH4
GRAND
VITARA
4
31
2
2
4
31
For driver air bag (inflator) module
For passenger air bag (inflator) module
1. Stretch deployment harness to full length 10 m (33 ft).
2. Connect connectors.
3. Power source (12V vehicle battery).
4. Short the two deployment harness leads.
10B-74 AIR BAG SYSTEM
7) Stretch the deployment harness from the driver or passenger
air bag (inflator) module to its full length 10 m (33 ft).
8) Place a power source near the shorted end of the deployment
harness. Recommended application: 12 Volts minimum, 2
amps minimum. A vehicle battery is suggested.
9) Verify that the area around the driver or passenger air bag (in-
flator) module is clear of all people and loose or flammable ob-
jects.
10) [In case of Driver Air Bag (Inflater) Module]
Verify that the driver air bag (inflator) module is resting with its
vinyl trim cover facing up.
[In case of Passenger Air Bag (Inflator) Module]
Verify that the passenger air bag (inflator) module is firmly and
properly secured in passenger air bag (inflator) module deploy-
ment fixture (special tool).
11) Connect the driver or passenger air bag (inflator) module to the
deployment harness connector and lock connector with lock le-
ver.
12) Notify all people in the immediate area that you intend to deploy
the air bag (inflator) module.
NOTE:

When the air bag deploys, the rapid gas expansion will
create a substantial report. Wear suitable ear protection.
Notify all people in the immediate area that you intend to
deploy the air bag (inflator) module and suitable ear
protection should be worn.

When the air bag deploys, the driver air bag (inflator)
module may jump about 30 cm (1 ft) vertically. This is a
normal reaction of the driver air bag (inflator) module to
the force of the rapid gas expansion inside the air bag.

After the 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 lu-
bricate the bag as it inflates) and byproducts of the
chemical reaction.

YH4
GRAND
VITARA
AIR BAG SYSTEM 10B-77
1. Slit on workbench
2. Workbench vise
3. Lower mounting bracket
ALWAYS CARRY AIR BAG (INFLATOR) MODULE
WITH TRIM COVER (AIR BAG OPENING) AWAY
FROM BODY.
ALWAYS PLACE AIR BAG (INFLATOR) MODULE
ON WORKBENCH WITH TRIM COVER (AIR BAG
OPENING) UP, AWAY FROM LOOSE OBJECTS.WARNING:

Always carry a live air bag (inflator) module with trim
cover away from you.

When storing a live air bag (inflator) module or when
leaving a live air bag (inflator) module unattended on
a bench or other surface, always face the bag and trim
cover up and away from the surface. As the live pas-
senger air bag (inflator) module must be placed with
its bag (trim cover) facing up, place it or the work-
bench with a slit or use the workbench vise to hold it
securely at its lower mounting bracket.

This is necessary so that a free space is provided to
allow the air bag to expand in the unlikely event of ac-
cidental deployment.
Failure to follow procedures may result in personal inju-
ry.
23) Temporarily store the air bag (inflator) module with its vinyl trim
cover facing up, away from the surface upon which it rests. Re-
fer to ªService Precautionsº in this section for details.
24) Contact your local distributor for further assistance.