2007 Lexus SC 430 Owners Manual - Page 307

5-2. Steps to take in an emergency Maintain the engine speed on the second vehicle and start the vehicle's engine. Once the vehicle's engine has started, remove the exact reverse jumper cables in the exact reverse order in which they were connected. Once the engine starts, have the vehicle checked at your Lexus dealer as soon as possible. n Avoiding a discharged battery l Turn off the headlights and the audio system while the engine is turned off. l Turn off any unnecessary electrical components when the vehicle runs at a low speed for an extended period, such as in heavy traffic, etc. n When disconnecting the battery Deactivate the theft deterrent system. If the system is not deactivated, it could sound the alarm and lock the doors. CAUTION n Avoiding battery fires or explosions Observe the following precautions to prevent accidentally igniting the flammable gas that may be emitted from the battery. l Make sure the jumper cable is connected to the correct terminal and that it is not unintentionally in contact with any part other than the intended terminal. l Do not allow the booster cables to come into contact with the + and - terminals. l Do not generate a flame near the battery by using a match, cigarette lighter, or smoking. 292