Air Bag Deactivation Procedures: Overview Lexus LS III

SYSTEM OPERATION CHECK

When ignition is turned on, SRS indicator light should come on for about 6 seconds and then go off. If indicator does not come on, or does not go off after about 6 seconds or comes on while driving, air bag system must be inspected and repaired as soon as possible.

1. Turn ignition switch to ON position, with engine off. SRS is operational if AIR BAG warning light comes on and then goes out after about 6 seconds with engine off.
2. If AIR BAG warning remains on, this indicates a fault in the SRS. If SRS warning light fails to illuminate when ignition is first turned on, this indicates bulb is faulty or there is a fault in the wiring circuit to the bulb.

1. Turn ignition switch to ON position, with engine off. On Lanos, system is functioning normally if AIR BAG warning light comes on and then goes out after about 7 seconds with engine off. On Leganza and Nubira, system is functioning normally if AIR BAG warning light flashes 7 times then goes out with engine off.
2. On all models, if AIR BAG warning remains on, this indicates a fault in the SRS. If SRS warning light fails to illuminate when ignition is first turned on, this indicates bulb is faulty or there is a fault in the wiring circuit to the bulb.

When ignition is turned on, SRS indicator light should come on for about 6 seconds and then go off. If indicator does not come on, or does not go off after about 6 seconds or comes on while driving, air bag system must be inspected as soon as possible.

When ignition is turned to on position SRS indicator light should flash 6 times, then turn off. If SRS indicator light does not function as stated or comes on during vehicle operation, a failure has occurred in SRS and must be repaired.

1. Turn ignition ON and verify that AIR BAG indicator light comes on for about 7 seconds, then goes off. With seat belt fastened and ignition ON, the SEAT BELT indicator light should also come on for about 7 seconds, then go off. SEAT BELT indicator light will stay on for longer than 7 seconds if seat belt is not fastened.
2. If the AIR BAG indicator light does not come on, or after about 7 seconds does not go out or begins to flash, a SRS malfunction has been detected.
3. On G20 and Q45 models, if the SEAT BELT indicator light does not come on, or stays on longer than 7 seconds with seat belt fastened, a seat belt pretensioner malfunction has been detected.

Turn ignition ON and verify that AIR BAG indicator light flashes 7 times, then turns off. AIR BAG indicator light should not come on during vehicle operation. If AIR BAG indicator light does not function as described, service air bag system.

1. To check air bag system, turn ignition switch from OFF to RUN position (engine off). If AIR BAG warning light illuminates for approximately 6 seconds, and then goes out, air bag system is functioning properly and no fault codes exist.
2. If a fault is detected in air bag system during initial system check, AIR BAG warning light will either fail to light, stay on continuously, or flash. If AIR BAG warning light flashes, indicating a fault in system, diagnose and repair as necessary.
3. If a system fault exists and AIR BAG warning light fails to light, an audible tone will be heard, indicating AIR BAG warning light is out and service is required. The tone is a chime which sounds 5 sets of 5 beeps.

Turn ignition switch to ON position (with engine off). Air bag indicator light should come on for about 5 seconds and then go out. If SRS warning light does not illuminate, or illuminates and does not go out, service SRS. If SRS warning light comes on for about 5 seconds, then remains on, a fault code is set in memory.

Turn ignition switch to ACC or ON position. Air bag indicator light in instrument cluster should come on for about 6 seconds, then go out. If indicator light remains on or flashes, a SRS malfunction has been detected.

Supplemental Restraint System (SRS) warning light indicates air bag and seat belt Emergency Tensioning Retractor (ETR) system readiness. Turn ignition on. SRS warning light will come on, and then go out after about 4 seconds (5 seconds on ML320/430/55) indicating system is functioning properly.

If SRS warning light does not come on, comes on while driving, or is on all the time (for crash related faults), there is a system fault.

Some vehicles may be equipped with passenger child safety seat air bag deactivation system (BabySmart). System requires a special child safety seat and a specially designed passenger front seat. When child seat is installed in passenger seat, the front passenger air bag is disabled.

When child seat IS properly installed, AIRBAG OFF indicator light (on center console) will come and stay on when ignition is in ON or RUN position. When child seat is NOT installed and ignition is turned on, AIRBAG OFF indicator light will come on for about 6 seconds and then go out.

Turn ignition on. SRS warning light on instrument panel should come on for about 7 seconds then turn off. This indicates SRS is functioning properly. If SRS warning light does not come on, stays on for longer than 7 seconds, or comes on while driving, SRS is malfunctioning and needs repair.

1. Turn ignition ON and verify that AIR BAG indicator light comes on for about 7 seconds, then goes off.
2. If the AIR BAG indicator light does not come on, or after about 7 seconds does not go out or begins to flash, a SRS malfunction has been detected.

Turn ignition switch to ON position, with engine off. AIR BAG light on instrument panel should come on for about 3 seconds and then go off. If AIR BAG light fails to come on, remains on after 3 seconds, or comes on while driving, air bag system requires servicing.

Turn ignition on. AIR BAG warning light should come on for 3-4 seconds, then go out. If the light goes out and then comes back on, or does not come on at all, a fault exists in the system.

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 come on, stays on steady or keeps flashing after flashing 7 times, there is a fault in the air bag system.

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.

Turn ignition switch to II (driving) position. AIR BAG warning light should come on for about 3 seconds, and then go out. If light remains lit, the air bag control unit has detected a system fault.