SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022

CAUTION:

Failure to carry out service procedures in the correct sequence could cause SRS parts to unexpectedly deploy and possibly lead to serious injuries. Furthermore, if a mistake is made when servicing SRS parts, they may fail to operate when required. Before performing servicing (including installation/removal, inspection and replacement of parts), be sure to read the following precautions.
Be sure to perform initialization of the airbag sensor assembly under any of the following conditions. If initialization is not performed, the SRS may not operate properly.
1. The airbag sensor assembly is replaced.
2. Accessories (seatback tray, seat cover, etc.) are installed or removed.
3. The front passenger seat is removed from the vehicle.
4. Any of the bolts that are used to install the front passenger seat are removed and reinstalled.
5. The passenger airbag ON/OFF indicator ("ON") illuminates when the front passenger seat is not occupied or the airbag OFF indicator illuminates when the front passenger seat is occupied (by an adult).
6. An occupant classification sensor collision detection DTC is output due to an accident or a collision.

(a) Furthermore, if a mistake is made when servicing SRS parts, they may fail to operate when required. Before performing servicing (including installation/removal, inspection and replacement of parts), be sure to read the following precautions.

Airbag sensor assembly
Front airbag sensor
Side airbag pressure sensor
Side No. 1 airbag sensor
Horn button assembly
Lower No. 1 instrument panel airbag assembly
Instrument panel passenger airbag assembly
Curtain shield airbag assembly
Front seat airbag assembly
Rear seat airbag assembly
Front seat cushion airbag assembly RH
Front seat inner belt assembly
Front seat outer belt assembly
Rear 3 point type seat outer belt assembly

(a) When troubleshooting the SRS, always check for DTCs before disconnecting the cable from the negative (-) auxiliary battery terminal.

(b) After turning the ignition switch off, disconnect the cable from the negative (-) auxiliary battery terminal.

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

(c) Before starting work relating to the SRS airbag system, fitting adjustment of the front/rear doors and removal, installation or replacement of parts near the airbag sensors, wait for at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal.

The SRS is equipped with a back-up power source. If work is started within 60 seconds of disconnecting the cable from the negative (-) auxiliary battery terminal, the SRS parts may deploy.

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

(a) Information labels are attached to the SRS parts. Follow the instructions on the labels.

(c) If any of the SRS parts are dropped, or if any cracks, dents or other defects are found, replace them with new parts.

(d) Never use airbags and pretensioners from another vehicle. When replacing parts, use new parts.

(f) If the vehicle has been involved in a minor collision where the SRS did not deploy, the airbags and pretensioners should be inspected before further use of the vehicle.

(g) Do not apply grease, detergent, oil or water to the SRS parts. If applied, immediately wipe it off with a dry cloth.

(h) When deploying or storing the SRS parts, avoid places with a high temperature and high humidity, and keep them away from electrical noise.

Never measure the resistance of the airbags and pretensioners because current from the tester may cause the airbags and pretensioners to deploy.

(k) Use a voltmeter/ohmmeter with high impedance (minimum = 10 kΩ) for troubleshooting electrical circuits.

(l) Be sure to check the SRS warning light and multi-information display after checking, removing and installing, or replacing the airbag and sensor.

(a) Keep the deployment side of an airbag facing upward even when the airbag is temporarily removed during service.

Always place a removed or a new airbag with the deployment side facing upward. Placing the airbag with the deployment side facing downward could cause a serious accident if the airbag deploys.

(b) When storing the airbag, do not place anything on top of the airbag or pile up airbags.

PRECAUTION FOR FRONT SEAT OUTER BELT ASSEMBLY (PRETENSIONER) AND REAR 3 POINT TYPE SEAT OUTER BELT ASSEMBLY (PRETENSIONER)

(a) Do not touch the area around the retractor even when the front seat outer belt assembly or rear 3 point type seat outer belt assembly is temporarily removed during service.

If the pretensioner unexpectedly deploys and the front seat outer belt assembly or rear 3 point type seat outer belt assembly is retracted during an operation, it could cause a serious accident.

(b) When storing the pretensioner, do not place objects on top of the pretensioner or pile up pretensioners.

(a) Do not replace the spiral cable with sensor sub-assembly with the auxiliary battery connected and the ignition switch ON.

(b) Do not rotate the spiral cable with sensor sub-assembly without the steering wheel assembly installed, with the auxiliary battery connected and the ignition switch ON.

(d) When rotating the spiral cable with sensor sub-assembly, make sure to push on the interlock to release the interlock mechanism.

(e) Do not remove the steering angle sensor from the spiral cable with sensor sub-assembly without using the lock pin, as this may shift the center point of the steering angle sensor.

(f) Be sure that the spiral cable with sensor sub-assembly is in the neutral position during installation and when removing and installing the steering wheel assembly.

If the steering wheel assembly is turned without the spiral cable with sensor sub-assembly installed in the neutral position, the cable may break.

(a) When the airbags and pretensioners are deployed (including when only an airbag or pretensioner is deployed) due to a collision, be sure to replace all sensors in the damaged areas (anywhere in need of repair) and the airbag sensor assembly.

(c) When removing and installing the airbag sensor assembly, front airbag sensor, side airbag pressure sensor and side No. 1 airbag sensor connectors, be sure to perform work with the sensors installed to the vehicle.

(a) Do not make any modifications to the front door that may change the inner pressure of the front door.

(b) Do not allow any foreign matter to enter the side airbag pressure sensor as it may affect the pressure detection performance of the sensor.

(c) When painting the front door, remove or apply protective tape to the side airbag pressure sensor to prevent paint from attaching to it.

(d) Make sure that the parts which maintain the sealing performance of the front door are securely installed. If the sealing performance of the front door decreases, the pressure detection performance of the side airbag pressure sensor may be affected. Repair or replace parts as necessary.

(a) All wire harnesses except unexposed harnesses in the engine compartment are colored yellow.

(a) Before using an electric welder on the vehicle, remove any airbags and pretensioners around the area being repaired.

(b) Before repairs, remove the airbag sensor assemblies if impacts are likely to be applied to the sensor during repairs.

(d) As the airbags and pretensioners are very hot after being deployed, ensure that all wire harnesses and connectors around deployed SRS parts are not damaged.