PRECAUTIONS FOR VEHICLES EQUIPPED WITH SRS AIRBAG The 1990 Supra for USA specifications is equipped with a SRS (Supplemental Restraint System) airbag. Failure to carry out service operations in the correct sequence could cause the SRS airbag system to unexpectedly deploy during servicing, possibly leading to a serious accident. Further, if a mistake is made in servicing the airbag system, it is possible the airbag may fail to operate when required. Before performing servicing (including removal or installation of parts, inspection or replacement), be sure to read the following items carefully, then follow the correct procedure described in this manual. Locations of Airbag Components Front Airbag Sensor RH Airbag Warning Light Steering Wheel Pad (with Airbag) Center Airbag Sensor Assembly Front Airbag Sensor LH Spiral Cable A80230 1. Malfunction symptoms of the airbag system are difficult to confirm, so the diagnostic codes become the most im- portant source of information when troubleshooting. When troubleshooting the airbag system, always inspect the diagnostic codes before disconnecting the battery (See page AB-24). Negative Cable IN2003 2. Work must be started after approx. 20 seconds or longer from the time the ignition switch is turned to the LOCK po- sition and the negative (—) terminal cable is disconnected from the battery. (The airbag system is equipped with a back-up power source so that if work is started within 20 seconds of dis- connecting the negative (—) terminal cable of the battery, the airbag may be deployed.)