Air Bag Systems: Service Precautions

NOTE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary instructions and the procedure and precautions in the applicable model year.

^ Malfunction symptoms of the supplemental restraint system are difficult to confirm, so the diagnostic trouble codes become the most important source of information when troubleshooting.
When troubleshooting the supplemental restraint system, always inspect the diagnostic trouble codes before disconnecting the battery.

^ Work must be started after 90 seconds from the time the Ignition SW is set to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.
(The supplemental restraint system is equipped with a back-up power source so that if work is started within 90 seconds of disconnecting the negative (-) terminal cable of the battery, the SRS may deploy.)
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio systems will be cancelled. So before starting work, make a record of the contents memorized by each memory system. When work is finished, reset the clock and audio system as before and adjust the clock.
To avoid erasing the memory of each memory system, never use a back-up power supply from outside the vehicle.

^ Even in cases of minor collision where SRS does not deploy, the steering wheel pad and airbag sensor assembly should be inspected.

^ Never use SRS parts from another vehicle. When replacing SRS parts, replace them with new parts.

^ Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.

^ Never disassemble and repair the steering wheel pad or airbag sensor assembly in order to reuse it.

^ If the steering wheel pad or airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket or connector, replace them with new ones.

^ Do not expose the steering wheel pad or airbag sensor assembly directly to hot air or flames.

^ Use a Volt/Ohmmeter with high-impedance (min. 10 K Ohms/V minimum) for troubleshooting the system's electrical circuits.

^ Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.

^ After work on the SRS is completed, check the SRS warning light.

^ If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the repair manual.