ECU SUZUKI GRAND VITARA 2001 2.G Workshop Manual

10B-48 AIR BAG SYSTEM
TABLE TEST DESCRIPTION
STEP 1 : This test rechecks “AIR BAG” warning lamp operation.
STEP 2 : This test rechecks whether an abnormality is in SDM.
DTC B1061 :
DTC B1071 – Internal SDM Fault
DTC WILL SET WHEN
An internal SDM fault is detected by SDM.
DTC B1013 – System Specifications Different from SDM Specifications
DTC WILL SET WHEN
Specifications of the air bag system differ from those of SDM.Step Action Yes No
1 1) This DTC is set when there is a trouble in
“AIR BAG” warning lamp circuit. Failure to
properly perform AIR BAG DIAGNOSTIC
SYSTEM CHECK may also result in mis-
diagnosis. Therefore, check “AIR BAG”
warning lamp circuit again according to
AIR BAG DIAGNOSTIC SYSTEM
CHECK.
Is “AIR BAG” warning lamp circuit in good
condition?Go to step 2. Repair “AIR BAG” warning
lamp circuit.
2 1) Clear DTC (Refer to DTC CLEARANCE).
2) Check DTC (Refer to DTC CHECK).
Is DTC B1061 set?Substitute a known-
good SDM and recheck.Recheck air bag system.
Refer to AIR BAG DIAG-
NOSTIC SYSTEM CHECK.
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.
NOTE:
DTC B1071 can never be cleared once it has been set.
1) Ignition switch OFF.
2) Replace SDM.
3) Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK.
NOTE:
Before executing items below, be sure to perform AIR BAG DIAGNOSTIC SYSTEM CHECK.
1) Ignition switch OFF.
2) Replace SDM.
3) Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK.

AIR BAG SYSTEM 10B-53
LIVE (INACTIVATED) SEAT BELT PRETENSIONER
Special care is necessary when handling and storing a live (inac-
tivated) seat belt pretensioners.
Also, when the seat belt pretensioners activate, gas is generated
and the seat belt (1) is retracted into the retractor assembly (2)
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.
•Never attempt to disassemble the seat belt pretensioners
(retractor 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 (inacti-
vated) 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 immedi-
ately 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:
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 (1) or use the workbench vise
(2) to hold it securely at its lower mounting bracket (3).
It is also prohibited to place anything on top of the trim
cover 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 acci-
dental deployment.
Otherwise, personal injury may result.
1
2 3
WARNING:
Never attempt to measure the resistance of the seat belt
pretensioners. It is very dangerous as the electric current
from the tester may activate pretensioner.

AIR BAG SYSTEM 10B-55
AIR BAG WIRE HARNESS AND CONNECTOR
Air bag wire harness (1) 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 (1), damaged wire
harness, connector or terminal is found, replace wire har-
ness, connectors and terminals as an assembly.
•When installing it, be careful so that the air bag wire harness
(1) is not caught or does not interfere with other parts.
•Make sure all air bag system grounding points (2) are clean
and grounds are securely fastened for optimum metal-to-
metal contact. Poor grounding can cause intermittent prob-
lems that are difficult 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/activate the air bag and seat belt
pretensioner according to deployment/activation procedure
described in “AIR BAG (INFLATOR) MODULE AND SEAT BELT
PRETENSIONER DISPOSAL”.
15
21
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) mod-
ule 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.

10B-58 AIR BAG SYSTEM
•Instrument panel member, reinforcement and knee bolster &
panel (1) (passenger)
–Check for any distortion, bending, cracking or other dam-
age.
•If any faulty condition is found in above checks, replace.
•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
–Check for external damage such as deformation, scratch,
crack, peeled paint, etc.
–Check that SDM cannot be installed properly due to a
cause in itself. (There is a gap between SDM and SDM
plate, or it cannot be fixed securely.)
–Check that connector or lead wire of SDM has a scorching,
melting or damage.
–Check SDM connector and terminals for tightness.
–Check SDM sets a diagnostic trouble code (Refer to “DTC
CHECK”.) and the diagnostic table leads to a malfunction-
ing 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 “INTERMITTENTS AND POOR CONNEC-
TIONS”.)
–Check wire harness clamps for tightness.
If any faulty condition is found, correct or replace.
15

AIR BAG SYSTEM 10B-61
INSPECTION
•Check SDM and SDM plate for dents, cracks or deformation.
•Check SDM connector for damage, cracks or lock mecha-
nism.
•Check SDM terminal for bent, corrosion or rust.
If any faulty condition is found in above checks, replace.
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 (2) to vehicle.
3) Tighten SDM bolts to specified torque.
Tightening torque
SDM bolt (a) : 6 N·m (0.6 kg-m, 4.5 lb-ft)
4) Connect SDM connector (1) to SDM (2) securely.
5) Install tuner assembly, clock assembly (5), tuner pocket,
radio hole cover (4), etc. and ashtray (3).
6) Install center garnish panel (2).
7) Install front and rear center console box (1).
8) Connect negative cable to battery.
9) Enable air bag system. Refer to “ENABLING AIR BAG SYS-
TEM” in this section. CAUTION:
Do not connect a tester whatever type it may be.
Never repair or disassemble SDM.
If SDM has been dropped, it should be replaced.
CAUTION:
Ensure that arrow on the SDM is pointing toward the front
of the vehicle.(a)
2
1
FORWARD

10B-66 AIR BAG SYSTEM
Deployment/Activation Outside Vehicle
Use this procedure when the vehicle itself is used again (only the
air bag (inflator) module(s) and seat belt pretensioner(s) are dis-
posed).
1) Turn ignition switch to “LOCK”, position remove key and put
on safety glasses.
2) Check that there is no open, short or damage in special tool
(deployment 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 (1) the two deployment harness leads together by fully
seating one banana plug into the other.
4) Remove air bag (inflator) module(s) and seat belt preten-
sioner(s) from vehicle, referring to SECTION 3C1, 10B and
10A. WARNING:
Deployment harness shall remain shorted and not be
connected to a power source until the air bag is to be
deployed and seat belt pretensioner is to be activated.
WARNING:
Always carry 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 on the workbench
with a slit (1) or use the workbench vise (2) to hold it
securely at its lower mounting bracket (3).
This is necessary so that a free space is provided to
allow the air bag to expand in the unlikely event of
accidental deployment.
Failure to follow procedures may result in personal
injury.
1
3
32

10B-68 AIR BAG SYSTEM
c) Fill plastic reservoir in fixture (special tool) with water or
sand. This is necessary to provide sufficient stabilization of
the fixture during deployment.
d) 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 (1).
Securely hand-tighten all fastener prior to deployment.
[In case of seat belt pretensioner]
a) Pull out the webbing (2) fully as shown in the figure and cut
it at the root of the pretensioner (retractor assembly) (1) as
shown in the figure.
b) Clear a space on the ground about 185 cm (6 ft) (4) in
diameter where the seat belt pretensioner (retractor assem-
bly) (1) is to be activated. A paved, outdoor location where
there is no activity is preferred. If an outdoor location is not
available, a space on the shop floor where there is no activ-
ity and sufficient ventilation is recommended.
Ensure no loose or flammable objects are within the activa-
tion area.
c) Place the seat belt pretensioner (retractor assembly) (1) as
shown in the figure on the ground in the space just cleared. CAUTION:
Be sure to use the following bolt and nut for fixing
passenger air bag (inflator) module to mounting
attachment.
Size : M8, Strength : 7T
WARNING:
As the drum (3) of the retractor assembly (1) turns very
quickly as soon as the webbing (2) is cut, fix the retractor
assembly (1) with a vise on the workbench and keep your
hands and fingers away from it when cutting the webbing
(2).

AIR BAG SYSTEM 10B-69
6) Stretch the deployment harness from the driver or passenger
air bag (inflator) module to its full length 10 m (33 ft) (1).
Special tool
(A) : 09932-75030
7) Place a power source (3) near the shorted end of the deploy-
ment harness. Recommended application: 12 Volts mini-
mum, 2 amps minimum. A vehicle battery is suggested.
8) Verify that the area around the air bag (inflator) module or
seat belt pretensioner is clear of all people and loose or flam-
mable objects.
9) Verify setting condition of air bag (inflator) module or preten-
sioner as follows.
[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
deployment fixture (special tool).
[In case of seat belt pretensioner]
Verify that the seat belt pretensioner, is placed as shown in
the figure on the ground in the space just cleared.
10) Connect (2) the air bag (inflator) module or seat belt preten-
sioner to the deployment harness connector and lock con-
nector with lock lever.
11) Notify all people in the immediate area that you intend to
deploy/activate the air bag (inflator) module or seat belt pre-
tensioner.
[A] : For Driver Air Bag (Inflator) Module
[B] : For Passenger Air Bag (Inflator) Module
[C] : For Seat Belt Pretensioner
NOTE:
When the air bag deploys and the pretensioner acti-
vates, 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 or activate the seat belt preten-
sioner and suitable ear protection should be worn.
When the driver air bag deploys and the pretensioner
activates, driver air bag (inflator) module and preten-
sioner (retractor assembly) may jump about 30 cm (1
ft) vertically. This is a normal reaction of them to the
force of the rapid gas expansion inside the air bag and
pretensioner.
After the air bag (inflator) module has been deployed,
the surface of the air bag may contain a powdery resi-
due. This powder consists primarily of cornstarch
(used to lubricate the bag as it inflates) and by-prod-
ucts of the chemical reaction.

10B-72 AIR BAG SYSTEM
Deployment/Activation Inside Vehicle
Use this procedure when scrapping the entire vehicle including
the air bag (inflator) modules and seat belt pretensioners.
1) Turn ignition switch to “LOCK” position, remove key and put
on safety glasses.
2) Remove all loose objects from front seats and instrument
panel.
3) [For driver air bag (inflator) module]
Disconnect contact coil connector (1) located near the base
of the steering column.
[For passenger air bag (inflator) module]
Remove glove box from instrument panel and disconnect
passenger air bag (inflator) module connector (2).
[For seat belt pretensioner]
Remove both side (driver and passenger side) front pillar
lower trim and disconnect seat belt pretensioner connectors
(3).
4) Confirm that each air bag (inflator) module is securely
mounted. CAUTION:
When vehicle itself will be used again, deploy/activate
the air bag and pretensioner outside vehicle according to
“DEPLOYMENT/ACTIVATION OUTSIDE VEHICLE”, for
deploying/activating it inside will cause the instrument
panel, glove box and their vicinity to be deformed.
Failure to observe this CAUTION may require unneeded
vehicle inspection and repair.
[A] : For Driver Air Bag (Inflator) Module
[B] : For Passenger Air Bag (Inflator) Module
[C] : For Seat Belt Pretensioner
[A]
[B]
[C]
1
2
3