For Vehicles Equipped With SRS Airbag and Seat Belt Pretensioner
FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONERHINT: The xB is equipped with a Supplemental Restraint System (SRS), and seat belt pretensioner.
Failure to carry out the service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing and lead to serious injury.
Furthermore, if a mistake is made when servicing the SRS, it is possible that the SRS may fail to operate properly. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the following items carefully. Then follow the correct procedures described.
a. GENERAL NOTICE
1. Malfunction symptoms of the SRS are difficult to confirm so the diagnostic trouble codes (DTCs) become the most important source of information when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
2. To avoid serious injury, servicing the SRS must be started 90 seconds after:
- The ignition switch is tuned to the "LOCK" position.
- The negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a backup power source. So, if work is started within 90 seconds after disconnecting the negative (-) terminal cable from the battery, the SRS may deploy). Disconnecting the negative (-) terminal cable will erase clock memory and audio system presets. If you wish to do, mark down data as necessary before disconnecting the cable. To avoid erasing the memory settings, never use a backup power supply.
3. In minor collisions where the SRS does not deploy, the horn button assembly, instrument panel passenger airbag assembly and seat belt pretensioner should be inspected before further use of the vehicle.
4. Never use the SRS parts from another vehicle. When replacing the parts, replace them with new parts.
5. Before repairs, remove the airbag sensor if impacts are likely to be applied to the sensor during repairs.
6. Never disassemble and repair the airbag sensor assembly, horn button assembly, instrument panel passenger airbag assembly or seat belt pretensioner.
7. Replace if the center airbag sensor assembly, side airbag sensor assembly, horn button assembly or the instrument panel passenger airbag assembly if:
1. damage has occurred from being dropped, or
2. if there are cracks, dents or other defects in the case, bracket or connector.
8. Do not directly expose the airbag sensor assembly, the horn button assembly, the instrument panel passenger airbag assembly or the seat belt pretensioner to hot air or flames.
9. Use a volt/ohmmeter with high impedance (10 kOhms/V minimum) for troubleshooting an electrical circuits.
10. Information labels are attached to the SRS components. Follow the instructions on the notices.
11. After work on the SRS is completed, check the SRS warning light.
b. SPIRAL CABLE (in Combination Switch)
1. The steering wheel must be fitted correctly to the steering column with the spiral cable at the neutral position, otherwise cable disconnection and other problems may occur.
c. HORN BUTTON ASSEMBLY (with Airbag)
1. When removing the horn button assembly or handling a new horn button, it should be placed with the pad top surface facing up. See illustration.
Placing it with the pad surface facing downward may lead to a serious accident if the airbag accidently inflates. Also, do not place horn buttons on top of one another.
2. Never measure the resistance of the airbag squib. This may cause the airbag to inflate, which could cause serious injury.
3. Grease or detergents of any kind should not be applied to the steering wheel pad.
4. Store the horn button assembly where the ambient temperature remains below 93°C (200°F), has low humidity and is away from electrical noise.
5. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (4 yellow pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag or seat belt pretensioner deploying due to currents entering the squib wiring.
6. When disposing of the vehicle or the horn button assembly by itself the airbag should be inflated using an SST before disposal. Perform the operation in a safe place away from electrical noise.
d. INSTRUMENT PANEL PASSENGER AIRBAG ASSY
1. Always place a removed or new instrument panel passenger airbag assembly with the airbag deployment direction facing upward.
Placing the airbag assembly with the airbag deployment direction facing downward could cause a serious accident if the airbag inflates.
2. Never measure the resistance of the airbag squib. This may cause the airbag to deploy, which could cause serious injury.
3. Grease or detergents of any kinds should not be applied to the instrument panel passenger airbag assembly.
4. Store the airbag assembly where the ambient temperature remains below 93°C (200°F), has low humidity and away from electrical noise.
5. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (4 yellow pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag or seat belt pretensioner deploying due to currents entering the squib wiring.
6. When disposing of a vehicle or the airbag assembly unit by itself, the airbag should be deployed using SST before disposal.
Activate in a safe place away from electrical noise.
e. SEAT BELT PRETENSIONER
1. Never measure the resistance of the seat belt pretensioner. This may cause the seat belt pretensioner to activate, which could cause serious injury.
2. Never disassemble the seat belt pretensioner.
3. Never install the seat belt pretensioner on another vehicle.
4. Store the seat belt pretensioner where the ambient temperature remains below 80°C (176°F), has low humidity and is away from electrical noise.
5. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (2 yellow pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag or seat belt pretensioner deploying due to currents entering the squib wiring.
6. As a safety measure, always activate the seat belt pretensioner before disposal. Activate the pretensioner in a safe place away from electrical noise.
(The seat belt pretensioner becomes hot after activation. Allow it to cool before disposing. Never use water to cool seat belt pretensioner.)
7. Oil or water should not be put on the front seat outer belt and the front seat outer belt should not be cleaned with any type of detergent.
f. AIRBAG SENSOR ASSEMBLY
1. Never reuse an airbag sensor assembly has been involved in a collision where its SRS has deployed.
2. The connectors to the airbag sensor assembly should be connected or disconnected with sensor mounted on the floor. If the connectors are connected or disconnected while the airbag sensor assembly is not mounted to the floor, it could cause accidental deployment the SRS.
3. To avoid serious injury, servicing the SRS must be started 90 seconds after:
- The ignition switch is turned to the "LOCK" position.
- The negative (-) terminal cable is disconnected from the battery.
g. WIRE HARNESS AND CONNECTOR
1. The SRS wire harness is integrated with the instrument panel wire harness assembly. All connectors in the system are a standard yellow color. If the SRS wire harness becomes disconnected or the connector becomes broken, repair or replace it.