1999 SUZUKI GRAND VITARA acc
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YH4
GRAND
VITARA
10B-52 AIR BAG SYSTEM
CODE 51 ± FRONTAL CRASH DETECTED (SYSTEM ACTIVATION COMMAND IS OUT-
PUTTED)
DTC WILL SET WHEN:
The SDM detects a frontal crash of sufficient force to warrant activation of the air bag system. (SDM outputs a de-
ployment/activation command.)
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) Ignition switch OFF.
2) Has air bag system deployed?Replace components and
perform inspections as
directed in ªRepairs and
Inspections Required after
an Accidentº in this section.Go to step 2.
21) Inspect front of vehicle and
undercarriage for signs of impact.
2) Are there signs of impact?Replace components and
perform inspections as
directed in ªRepairs and
Inspections Required after
an Accidentº in this section.Substitute a known-good
SDM and recheck.
NOTE:
CODE 51 can never be cleared once it has been set.
Upon completion of inspection and repair work, perform following items.
1) Replace SDM.
2) Reconnect all air bag system components, ensure all components are properly mounted.
3) Repeat ªAir Bag Diagnostic System Check Flow Tableº, referring to p.10B-11 to confirm that the
trouble has been corrected.
Page 760 of 801
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10B-54 AIR BAG SYSTEM
CODE 61 ± ªAIR BAGº WARNING LAMP CIRCUIT FAILURE (Page 2 of 2)
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic System Check Flow Tableº.
STEP
ACTIONYESNO
11) This DTC is set when there is a trouble in
ªAIR BAGº warning lamp circuit. Failure to
properly perform ªAir Bag Diagnostic System
Check Flow Tableº may also result in
misdiagnosis. Therefore, check ªAIR BAGº
warning lamp circuit again according to ªAir
Bag Diagnostic System Check Flow Tableº.
2) Is ªAIR BAGº warning lamp circuit in good
condition?Go to step 2.Repair ªAIR BAGº
warning lamp circuit.
21) Clear diagnostic trouble codes.
2) Is DTC 61 set ?Substitute a known-
good SDM and recheck.Recheck air bag system,
referring to ªAir Bag
Diagnostic System
Check Flow Tableº.
NOTE:
Upon completion of inspection and repair work, perform following items.
1) Reconnect all air bag system components, ensure all components are properly mounted.
2) Repeat ªAir Bag Diagnostic System Check Flow Tableº, referring to p. 10B-11 to confirm that the trouble
has been corrected.
CODE 71 ± INTERNAL SDM FAULT
DTC WILL SET WHEN:
An internal SDM fault is detected by SDM.
NOTE:
CODE 71 can never be cleared once it has been set.
1) Ignition switch OFF.
2) Replace SDM.
3) Repeat ªAir Bag Diagnostic System Check Flow Tableº, referring to p.10B-11.
Page 761 of 801
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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 93C (200F) (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.
Page 764 of 801
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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 65C
(150F), 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.
Page 765 of 801
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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.
Page 768 of 801
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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.
Page 769 of 801
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AIR BAG SYSTEM 10B-63
REPAIRS AND INSPECTIONS REQUIRED AFTER AN ACCIDENT
CAUTION:
All air bag system components, including the electrical harness (component mounting points), must
be inspected after an accident. If any components are damaged or bent, they must be replaced even
if air bag system activation did not occur.
Never use air bag system parts from another vehicle.
Do not attempt to service the parts below. Service of these parts is by replacement only.
± Driver/Passenger air bag (inflator) module
± Driver/Passenger seat belt pretensioner
± SDM
± Contact coil and combination switch assembly
± Air bag wire harness
Proper operation of the sensors and air bag system requires that any repairs to the vehicle structure
return it to its original production configuration.
CAUTION:
After detecting one time of such collision as to meet deployment conditions, the SDM must not be used.
Refer to ªDiagnosisº when checking the SDM.
ACCIDENT WITH DEPLOYMENT ± COMPONENT
REPLACEMENT
Certain air bag system components must be replaced. Those com-
ponents are:
Driver and passenger air bag (inflator) modules
± Replace with new one.
Driver and passenger seat belt pretensioners
± Replace with new one as an assembly.
SDM after detecting such collision as to meet deployment condi-
tions
± Replace with new one.
Page 770 of 801
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10B-64 AIR BAG SYSTEM
ACCIDENT WITH OR WITHOUT DEPLOYMENT ± COM-
PONENT INSPECTIONS
Certain air bag and restraint system components must be in-
spected after any crash, whether the air bag deployed or not.
Those components are:
Steering column and shaft joints
± Check for length, damage and bend according to ªChecking
Steering Column for Accident Damageº in SECTION 3C1.
Steering column bracket and capsules
± Check for damage and bent.
If any faulty condition is found in above checks, replace faulty
part.
Steering wheel and driver air bag (inflator) module
± Check for damage or air bag (inflator) module fitness.
± Check trim cover (pad surface) for cracks.
± Check wire harness and connector for damage or tightness.
If any faulty condition is found in above checks, replace faulty
part.
Contact coil and combination switch assembly
± Check wire harness and connectors for damage or tightness.
± Check contact coil case for damage.
If any faulty condition is found in above checks, replace.
Instrument panel member and reinforcement
± Check for any distortion, bending, cracking or other damage.
If any faulty condition is found in above checks, replace.