Air Bag Deactivation Procedures: Other Lexus LX J100 рестайлинг

SPECIAL CARE DURING MECHANICAL REPAIRS

Note. This article applies to 2004 vehicles, except where noted.

Note. When the battery is disconnected, vehicle computer and memory system may lose data. Driveability problems may exist until computer systems have completed a relearn cycle.

In some instances, it may be necessary to remove steering column or instrument panel to gain access to blower motor housing, heater assembly, evaporator assembly, or other A/C-heater system related components. Observe manufacturer service precautions when working on a vehicle equipped with an air bag system. See appropriate manufacturer's SERVICE PRECAUTIONS.

Electrical sources should never be allowed near inflator on back of air bag module. Never probe air bag system electrical wires with analog volt-ohmmeter or test light. Always disable air bag system before servicing vehicle. See appropriate DISABLING & ACTIVATING AIR BAG SYSTEM procedure. Failure to do so could result in accidental air bag deployment and possible personal injury.

If air bag system is not fully functional for any reason, DO NOT drive vehicle until system is repaired and is again operational. DO NOT remove bulbs, modules, sensors or other components, or in any way disable system from operating normally. If air bag system is not functional, park vehicle until system is repaired and functions properly.

SERVICE PRECAUTIONS

Observe the following precautions when servicing SRS

1. Disable SRS before servicing any SRS, instrument panel or steering column component. Failure to do this could result in accidental air bag deployment and possible personal injury. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(ref-161573-S34211659232004041600000) .
2. DO NOT use any type of back-up power supply from outside vehicle to avoid memory loss in memory systems. Back-up power supplies can provide enough voltage to activate SRS components.
3. After turning ignition switch to OFF 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 within 90 seconds after disconnecting negative battery cable.
4. In a minor collision in which air bags did not deploy, inspect front air bag sensors, steering wheel pad, front passenger's air bag assembly, side air bag assembly, curtain air bag assembly, seat belt pretensioner, air bag control module, and side air bag sensor.
5. If steering wheel pad, front or side air bag assemblies, curtain air bag assembly, air bag sensor, side air bag sensor or front air bag sensor has been dropped, or if there are cracks, dents or other defects in the case, connectors or brackets, replace the component.
6. Remove air bag sensors if an impact is likely to be applied to area close to sensors during repair.
7. Never disassemble or repair system components. Replace cracked, dented or otherwise damaged system components.
8. DO NOT expose front air bag sensors, center air bag sensor assembly, steering wheel pad, passenger's air bag, side air bags or seat belt pretensioners directly to hot air or flame.
9. DO NOT store air bag modules where they will be exposed to temperatures greater than 199° F (93° C), high humidity or electrical noise. DO NOT store seat belt pretensioners to temperatures greater than 176° F (80° C), high humidity or electrical noise.
10. Information labels are attached to air bag components. Follow all notices on labels.
11. After servicing SRS, check air bag indicator light to ensure system is functioning properly. See «SYSTEM OPERATION CHECK»(ref-161573-S42693720192004041600000) .
12. Always wear safety glasses when servicing or handling air bags or seat belt pretensioners.
13. When placing a live air bag module on a bench or other flat surface, always face air bag module and trim cover up, away from surface. This will reduce motion of module if it is accidentally deployed.
14. After deployment, air bag surface may contain deposits of sodium hydroxide, which irritates skin. Always wear safety glasses, rubber gloves and long-sleeved shirt during clean-up. After clean-up, wash hands using mild soap and water.
15. After deployment, steering wheel pad is very hot. WAIT 30 minutes before touching.
16. DO NOT install components previously installed on another vehicle. Only use NEW components supplied by manufacturer.
17. When using electric welding, disconnect air bag module and seat belt pretensioner connectors.
18. When carrying a live air bag module, trim cover must be pointed away from body to minimize injury in case of accidental air bag deployment.
19. 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. See «SYSTEM OPERATING CHECK»(ref-161573-S42693720192004041600000) .

DISABLING & ACTIVATING AIR BAG SYSTEM

Note. All SRS harness connectors are colored Yellow to distinguish them from other connectors.

Note. If ignition switch is turned to ON position, with air bag sensor assembly connectors disconnected, or if a vehicle battery is removed with ignition switch turned to ON position, the system will determine this condition as a failure and it will automatically call the call center. When an accidental call is made automatically, access the call center and ask them to cut off the line. To prevent accidental calls, perform the following when working on procedures related to air bag sensor assembly or battery. Disconnect Mayday ECU and back-up battery connectors before disconnecting air bag sensor assembly connector. Ensure that ignition switch is in OFF position when removing a vehicle battery. If no signal has been received from the air bag sensor assembly since ignition switch was turned to ON position, a service call will be made. If good signal reception from air bag sensor assembly after ignition switch ON is interrupted, an emergency call will be made.

DISABLING AIR BAG SYSTEM

1. Obtain radio anti-theft protection code from vehicle owner, and record preset radio frequencies before disconnecting battery.
2. Place front wheels in straight-ahead position. Turn ignition switch to OFF position. Disconnect and shield negative battery cable. WAIT at least 90 SECONDS before working on vehicle.

ACTIVATING AIR BAG SYSTEM

1. Ensure ignition key is removed from switch. Connect negative battery cable.
2. Staying well away from air bag modules, turn ignition switch to ACC or ON position. Ensure AIR BAG indicator light operates properly. See «SYSTEM OPERATION CHECK»(ref-161573-S42693720192004041600000) . If equipped with a sliding roof, go to next step.
3. When battery is disconnected, sliding roof motor AUTO operation must be reset. To reset sliding roof motor, press sliding roof switch on TILT UP side and hold it. When roof glass stops at fully tilted-up position for one second, reset of motor is completed. If battery terminal is disconnected or after jam protection function has operated, the ECU of sliding roof motor may not detect position of roof glass.
4. On ES 330, always reset sliding roof motor whenever battery is disconnected. If not reset, AUTO operation and jam protection function will not operate. Set sliding roof glass in to fully tilt-up position. Push and hold sliding roof switch UP until sliding roof tilts down a little. Check that sliding roof tilts up/down and slides open/close in AUTO operation. If sliding roof is not in correct position, press and hold sliding roof switch UP and CLOSE until 10 seconds have passed after roof stops moving or starts reverse operation. Reset operation will be completed. If jam protection function does not work, reset sliding roof drive gear (motor) again.
5. On GX 470, if AUTO operation function does not operate after reconnecting battery, reset sliding roof motor. Press sliding roof switch on TILT UP side and hold it. When roof glass stops at fully tilted-up position for one second, reset of motor is completed. If battery terminal is disconnected or after jam protection function has operated, sliding roof motor ECU may not detect position of roof glass. If AUTO operation function is still disabled even after sliding roof motor is reset, the hall IC (built in sliding roof motor assembly) for detecting roof glass position may be malfunctioning.
6. On IS 300, sliding roof motor ECU must be reinitialized after reconnecting battery. Reinitialize sliding roof by moving sliding roof to maximum tilted position. Release switch, press switch again and hold it for 10 seconds. Sliding roof operates in a cycle of TILT DOWN, SLIDE OPEN, SLIDE CLOSE and TILT UP. This completes reinitializing.
7. On RX 330, sliding roof may not operate automatically, and jam protection function will not operate correctly, after battery is reconnected. To reset sliding roof, press sliding roof switch on SLIDE CLOSE or TILT DOWN and hold it. When roof glass stops at fully close position for one second, reset of motor is completed. If battery terminal is disconnected, ECU of sliding roof motor may not detect position of roof glass. If AUTO operation function is still disabled, even after sliding roof motor is reset, the hall IC (built in sliding roof motor assembly) for detecting roof glass position may be malfunctioning.