Hummer H2. Manual - part 20

Disable SRS before servicing any SRS or steering column component. See DISABLING &
ACTIVATING AIR BAG SYSTEM .

Wait at least 3 MINUTES after disabling SRS before servicing vehicle. SRS voltage is maintained for at
least 3 minutes after system is disabled. Servicing system before 3-minute period may cause accidental
SRS deployment and possible personal injury.

Air bag will operate only when ignition switch is in ON or START position. Ignition switch should be in
OFF position when working under hood or inside vehicle.

When servicing vehicle, SRS and related parts should be pointed away from technician.

DO NOT use a circuit tester to check air bag harness connectors. SRS wiring harness and connectors
have Yellow insulation for easy identification. Keep all ground points clean.

Impact sensor(s), safing sensor and tunnel sensor must be installed with arrow marks facing front of
vehicle. Also, check sensors for cracks, defects and rust before installation. Replace sensors as necessary.

If steering gear is removed, DO NOT turn steering wheel or column shaft. Rotation of SRS spiral cable
under steering wheel air bag module is limited. SRS spiral cable must be aligned in neutral position
(centered).

On vehicles equipped with passenger-side air bag module ON/OFF switch, ensure ON/OFF switch is in
the same position as when vehicle was brought in for service.

Handle air bag modules carefully. Always place air bag modules with pad facing upward. DO NOT
disassemble air bag module.

If accidentally deployed, rubber cap on seat belt pretensioner will be blown out of cylinder tip by high
temperature gases. When laying aside seat belt pretensioner, ensure cylinder tip points away from people
(place pretensioners in a box if possible).

After servicing, perform SYSTEM OPERATION CHECK .

DO NOT expose air bag module to temperatures exceeding 194°F (90°C). DO NOT allow oil, grease or
water to contact module.

If vehicle is damaged in a collision, check impact sensor, tunnel and safing sensors and related wiring
harnesses.

Before discarding an air bag module or seat belt pretensioner (including scrapping a vehicle with air bag
system), always deploy air bag(s) and seat belt pretensioners.

Replace used mounting bolts with NEW mounting bolts.

DISABLING & ACTIVATING AIR BAG SYSTEM

To disable SRS, turn ignition off. Disconnect and shield BOTH battery cables. Wait at least 3 MINUTES before
working on vehicle. To activate SRS, connect battery cables. Turn ignition on. Ensure AIR BAG indicator light
operates as specified. See SYSTEM OPERATION CHECK .

SUBARU

WARNING:

Some vehicles are equipped with a passenger-side air bag ON/OFF
switch. This switch should NOT be used in place of specified vehicle air
bag system disabling and activating procedures.

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

SYSTEM OPERATION CHECK

Turn ignition on. AIR BAG warning light in instrument cluster should come on and then go out after
approximately 7 seconds. If AIR BAG warning light stays on for longer than 7 seconds, or does not come on,
SRS is malfunctioning.

SERVICE PRECAUTIONS

Observe following precautions when working with air bag system:

Disable SRS before servicing any SRS or steering column component. Failure to disable system could
result in accidental air bag deployment and possible personal injury. See DISABLING &
ACTIVATING AIR BAG SYSTEM .

Wait at least 20 SECONDS after disconnecting battery cable before servicing SRS. See DISABLING &
ACTIVATING AIR BAG SYSTEM . Back-up power supply maintains SRS power for 20 seconds after
battery is disconnected. Servicing SRS before 20 seconds have elapsed may cause accidental air bag
deployment and possible personal injury.

Whenever possible when working near, removing, or installing an undeployed air bag module, DO NOT
position yourself directly in front of air bag.

In a minor collision in which air bag does not deploy, front air bag impact sensors and steering wheel pad
should be inspected.

If side air bag must be replaced, seat and air bag must be replaced as an assembly.

DO NOT use air bag parts from another vehicle. Replace air bag parts with new parts.

Remove front impact sensors if shocks are likely to be applied to area near sensors during repairs.

DO NOT repair damage or open circuits found in SRS harnesses. Manufacturer recommends replacement
of any defective SRS harness with a new part.

DO NOT disassemble and attempt repair of front impact sensors or steering wheel pad.

If front impact sensors, control unit, or steering wheel pad is dropped, or if there are cracks, dents, or
other defects in the case or connector, replace parts with new ones.

DO NOT expose front impact sensors, control unit, or steering wheel pad to temperatures greater than
194°F (90°C).

DO NOT apply tester probes directly to any SRS harness connector terminal.

Information labels are attached to air bag components. Follow all notices on labels.

After work on SRS is completed, verify system is functioning properly. See SYSTEM OPERATION
CHECK .

Always wear safety glasses when servicing or handling an air bag.

DO NOT check for air bag module continuity with air bag removed from vehicle.

When placing a live air bag on a bench or other surface, always face air bag and trim cover up, away from
surface. This will reduce motion of module if it is accidentally deployed.

After deployment, air bag surface may contain deposits of sodium hydroxide, which irritates skin. Always
wear safety glasses, rubber gloves, and long sleeves shirt during clean-up. Wash hands with mild soap
and water.

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

When carrying a live air bag module, point trim cover away from body to minimize injury in case of
deployment.

If SRS is not fully functional for any reason, vehicle should not be driven until system is repaired and
again becomes operational. DO NOT remove bulbs, modules, sensors, or other components or in any
way disable system from operating normally. If SRS is not functional, park vehicle until it is repaired and
functions properly.

DISABLING & ACTIVATING AIR BAG SYSTEM

To disable SRS, turn ignition off. Disconnect and shield negative battery cable. After battery cable has been
disconnected, wait at least 20 SECONDS before servicing SRS. To activate SRS, reconnect negative battery
cable. Observe AIR BAG warning light to verify system is functioning properly. See SYSTEM OPERATION
CHECK .

SUZUKI

SYSTEM OPERATION CHECK

Turn ignition switch to ON position. If system is functioning normally, AIR BAG indicator should flash 7 times
(6 times on Esteem). If air bag warning light does not operate as specified, service air bag system.

SERVICE PRECAUTIONS

Observe the following precautions when servicing SRS:

Disable air bag system before servicing any air bag or steering column component. Failure to disable air
bag could result in accidental air bag deployment and possible personal injury. See DISABLING &
ACTIVATING AIR BAG SYSTEM .

After turning ignition switch to LOCK position and removing AIR BAG or AIR BAG-IG fuse, wait at
least 10 SECONDS before working on vehicle. Sensing and Diagnostic Module (SDM) maintains a
reserve voltage for up to 10 seconds.

Always wear safety glasses when servicing or handling an air bag.

Handle air bag module(s) carefully. Always place air bag module(s) with pad facing upward. DO NOT
disassemble air bag module.

If the air bag system and another vehicle system both need repair, the air bag system must be repaired
first to avoid unintended air bag deployment.

DO NOT modify steering wheel, dashboard, or any other air bag system component. Modifications can
adversely affect air bag system performance and lead to personal injury.

Never use air bag parts from another vehicle. Replace air bag parts with new parts.

Remove air bag modules and SDM if repairing the vehicle requires exposing the vehicle to temperatures
over 200°F (93°C). Never expose air bag system components directly to hot air or flames.

Remove air bag components if repairing the vehicle requires impacting (shocking) the vehicle.

When using electric welding equipment, always disconnect air bag module connectors.

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

If painting vehicle, DO NOT expose air bag harness or connectors to paint mist.

DISABLING & ACTIVATING AIR BAG SYSTEM

Disabling System

1. Ensure wheels are in straight-ahead position. Turn ignition switch to LOCK position. Remove ignition

key. Remove AIR BAG or AIR BAG-IG fuse from fuse block, located on left kick panel. Wait at least 10
SECONDS before working on vehicle. Remove left side cap from steering wheel. Release locking lever
and disconnect Yellow connector for driver-side air bag module.

2. Pull out glove box while pushing in both right and left sides. Release locking lever and disconnect

Yellow connector for passenger-side air bag module (located in glove box opening).

Activating System

Reconnect driver-side air bag module and passenger-side air bag module connector. Install AIR BAG or AIR
BAG-IG fuse. Perform SYSTEM OPERATION CHECK .

TOYOTA

SYSTEM OPERATION CHECK

Turn ignition switch to ACC or ON position. Air bag warning light should come on for about 6 seconds, then
go out. If air bag warning light does not operate as specified, service air bag system.

SERVICE PRECAUTIONS

Observe the following precautions when servicing SRS:

Disable SRS before servicing any SRS or steering column component. Failure to disable air bag could
result in accidental air bag deployment and possible personal injury. See DISABLING &
ACTIVATING AIR BAG SYSTEM .

After turning ignition switch to LOCK position and disconnecting negative battery cable, wait at least 90
SECONDS before working on vehicle. SRS is equipped with a back-up power source that may allow air
bag to deploy until 90 seconds after disconnecting negative battery cable.

Remove center air bag sensor and front air bag sensors if repairing the vehicle requires impacting
(shocking) the vehicle.

NOTE:

With AIR BAG or AIR BAG-IG fuse removed and ignition on, AIR BAG warning
light will be on. This is normal and does not indicate an air bag system
malfunction.

WARNING:

Some vehicles are equipped with a passenger-side air bag ON/OFF
switch. This switch should NOT be used in place of specified vehicle air
bag system disabling and activating procedures.

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

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