Service Precautions - Toyota 4Runner 1996 Manual

AIR BAG RESTRAINT SYSTEM 1996 ACCESSORIES/SAFETY EQUIPMENT Toyota Air Bag Restraint System
The air bag sensor, which deploys air bags, contains a back-up power supply, safing sensor and diagnostic code
memory. Spiral cable (clockspring) maintains a complete circuit to the steering wheel pad.
SYSTEM OPERATION CHECK
Turn ignition switch to ACC or ON position. Air bag warning light in instrument cluster should come on for
about 6 seconds and then go out. If light does not respond as specified, SRS is malfunctioning and needs repair.
See DIAGNOSIS .

SERVICE PRECAUTIONS

Observe the following precautions when working on SRS:
Before servicing any SRS or steering column component, disable SRS. See DISABLING &

ACTIVATING AIR BAG SYSTEM . Failure to disable system could result in accidental air bag
deployment and personal injury.
When diagnosing SRS, always check for diagnostic codes before disconnecting battery.

After ignition switch is turned to LOCK position and negative battery cable is disconnected, wait at least

90 seconds before working on SRS. SRS is equipped with a back-up power source that may allow air bag
to deploy within 90 seconds of disconnecting negative battery cable.
In a minor collision in which air bags do not deploy, steering wheel pad must be inspected.

NEVER use air bag parts from another vehicle. Replace air bag parts with new parts.

Air bag sensor assembly contains mercury. After replacement, DO NOT destroy the old part. When

scrapping vehicle or replacing air bag sensor assembly, remove air bag sensor assembly and dispose of as
toxic waste.
Never disassemble or repair system components. Replace cracked, dented or otherwise damaged system

components.
Remove air bag sensor if shocks are likely to be applied to the sensor during repairs.

When diagnosing electrical circuits, use a Digital Volt/Ohmmeter (DVOM) with high impedance (10,000

ohms minimum).
Information labels are attached to air bag components. Follow all notices on labels.

After servicing SRS, check air bag warning light to ensure system is functioning properly. See SYSTEM

OPERATION CHECK .
Always wear safety glasses when servicing or handling an air bag.

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 accidentally deployed.
After deployment, air bag surface may contain deposits of sodium hydroxide which irritates skin. During

clean-up, always wear safety glasses, rubber gloves and long-sleeved shirt. After clean-up, wash hands
using mild soap and water.
When carrying a live air bag module, trim cover must be pointed away from your body to minimize

injury in case of accidental 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
1996 Toyota 4Runner