IN−10 − INTRODUCTION FOR ALL OF VEHICLES FOR ALL OF VEHICLES PRECAUTION 1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONER (a) The 1999 LEXUS LX470 is equipped with an SRS (Sup- plemental Restraint System), such as the driver airbag, front passenger airbag assembly and seat belt preten- sioner. Failure to carry out service operations in the correct se- quence could cause the supplemental restraint system to unexpectedly deploy during servicing, possibly leading to a serious accident. Further, if a mistake is made in servicing the supplemental restraint system, it is possible the SRS may fail to operate when required.
Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the following items carefully, then follow the cor- rect procedure described in this manual. IN086−04 (b) GENERAL NOTICE (1) Malfunction symptoms of the supplemental re- straint system are difficult to confirm, so the diag- nostic 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 (See page DI−449 ).
(2) Work must be started after 90 seconds from the time the ignition switch is turned to the ”LOCK” posi- tion and the negative (−) terminal cable is discon- nected 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 neg- ative (−) terminal cable from the battery, the SRS may deploy.) When the negative (−) terminal cable is discon- nected 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 the each memory system. Then when work is fin- ished, reset the clock and audio systems as before.
To avoid erasing the memory of each memory sys- tem, never use a back−up power supply from anoth- er battery. Negative Cable BO4111 10 Author : Date: