Hummer H2. Manual — part 11

instrument panel or steering column. See DISABLING & ACTIVATING AIR BAG SYSTEM .

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Because of critical operating requirements of air bag system, DO NOT attempt to service any air bag
system component. If a component is faulty it must be replaced.

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DO NOT leave air bag components unattended. Install air bag components in vehicle immediately after
they are obtained.

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NEVER point open end of a seat belt tensioner at another person.

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Only install NEW air bag system components supplied by manufacturer. DO NOT use components
previously installed in another vehicle.

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DO NOT use air bag components that have been dropped from heights of approximately 20 inches or
more.

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DO NOT allow chemical cleaners, oil or grease to contact vinyl covering on air bag.

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DO NOT place stickers or covers on steering wheel, passenger-side instrument panel or over front seat
backs. Using a seat cushion, mat or pad on front passenger seat, may inhibit operation of seat occupied
sensor and side air bags.

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Disable SRS before performing electric welding on vehicle.

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DO NOT expose air bag to temperatures greater than 212°F (100°C).

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DO NOT allow any electrical source near front or side air bag inflators or near seat belt tensioner
connector.

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When carrying a live air bag assembly, trim cover pad should be pointed away from body to minimize
injury in case of accidental air bag deployment.

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If SRS is not fully functional for any reason, vehicle should not be driven until system is repaired. DO
NOT remove any component or in any way disable system from operating normally. If SRS is not
functional, park vehicle until repairs can be made.

DISABLING & ACTIVATING AIR BAG SYSTEM

1. Obtain radio anti-theft code from vehicle owner and write down preset radio frequencies. To disable air

bag system, disconnect and shield negative battery cable.

2. To activate system, ensure no one is in passenger compartment and reconnect negative battery cable.

Perform system operation check to ensure system is functioning properly. See SYSTEM OPERATION
CHECK . Input radio anti-theft security code and reset radio frequencies.

BMW

SYSTEM OPERATION CHECK

Turn ignition switch to ON position. SRS is operational if warning light comes on and then goes out after about
4-6 seconds. There is a SRS malfunction if SRS warning light does not come on, comes on briefly or blinks and
goes out, and then comes on and stays on. A SRS malfunction is also indicated if SRS warning light comes on
and stays on or flickers while driving.

SERVICE PRECAUTIONS

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

Observe these precautions when working on SRS:

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When working around steering column and before any repairs are performed, disable SRS. See
DISABLING & ACTIVATING AIR BAG SYSTEM .

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Before straightening damaged metal or arc-welding, disable SRS and disconnect front sensors, front air
bag modules, seat belt tensioners (if equipped) and side air bag modules connectors. See DISABLING &
ACTIVATING AIR BAG SYSTEM .

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After disabling SRS, wait at least 10 MINUTES before servicing vehicle. SRS control unit maintains SRS
voltage for about 10 minutes after system is disabled. Servicing SRS before 10 minutes may cause
accidental air bag deployment and possible personal injury.

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Always wear safety glasses and gloves when handling a deployed air bag module. Air bag module may
contain sodium hydroxide deposits, which irritates skin.

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Handle sensors carefully. Never strike or jar sensors. All sensors and mounting bracket bolts must be
tightened to specification to ensure proper sensor operation.

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Never use any SRS component that has been dropped from 2 feet or more.

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DO NOT repair any SRS component or wiring harness. Wiring harnesses and connectors are Orange for
immediate identification.

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Always handle air bag module with trim cover away from body. Always place air bag module on
workbench with trim cover up, away from loose objects. DO NOT leave air bag modules unattended.

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Never expose SRS components to temperatures greater than 167°F (75°C).

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Front air bag modules, belt tensioners and side air bag modules (if equipped) can only be checked while
installed in vehicle and using a BMW Service Tester/DIS. Only attempt SRS inspections using specified
procedures and checking devices.

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Never expose any SRS system components to cleaning agents such as solvents, gasoline, lye, etc.

DISABLING & ACTIVATING AIR BAG SYSTEM

Disabling System

1. Before proceeding, see SERVICE PRECAUTIONS . Retrieve fault codes before disconnecting battery.

Ensure ignition is off. Disconnect and shield negative battery cable. Wait at least 10 MINUTES for
energy capacitor in SRS control unit to discharge.

2. To disable driver-side air bag, remove steering column lower casing cover. See Fig. 13 . Remove Orange

SRS connector from its holder on steering column and disconnect connector. To disable passenger-side
air bag, remove glove box. Disconnect both Orange SRS connectors from passenger-side air bag module.

CAUTION: Ensure radio is off before disconnecting battery. This will prevent damage

to radio microprocessor.

WARNING:

After disabling system, wait at least 10 MINUTES before servicing vehicle.
Energy capacitor in SRS control unit maintains system voltage for about
10 minutes after system is disabled. Servicing system before 10 minutes
may cause accidental air bag deployment and possible personal injury.

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

3. If vehicle is equipped with belt tensioners disconnect belt tensioner Orange connector. If vehicle is

equipped side air bags, remove door panel and disconnect side air bag Orange connector. System is now
disabled.

Activating System

1. Ensure ignition switch is in OFF position. Reconnect all Orange SRS connectors that were disconnected.

Position each Orange SRS connector back into appropriate holder. To complete installation, reverse
access procedures.

2. Ensure no one is inside vehicle and connect negative battery cable. System is now activated. Perform

system operation check to ensure system is functioning properly and no fault codes are set. See SYSTEM
OPERATION CHECK .

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures

1997 Lexus SC 300

GENERAL INFORMATION Air Bag Deactivation Procedures