2007 Lexus GS 450h Owners Manual - Page 492

5-2. Steps to take in an emergency Maintain the engine speed on the second vehicle and turn the power switch to the "IG-ON" mode, then start the vehicle's hybrid system. STEP 6 Make sure the "READY" light comes on. If the light does not come on, contact your Lexus dealer. STEP 7 Once the vehicle's hybrid system has started, remove the jumper cables in the exact reverse order in which they were connected. Once the hybrid system starts, have the vehicle checked at your Lexus dealer as soon as possible. STEP 5 n To prevent 12 volt battery discharge l Turn off the headlights and the audio system while the hybrid system is off. l Turn off any unnecessary electrical components when the vehicle is running at a low speed for an extended period, such as in heavy traffic, etc. n When the 12 volt battery is removed or discharged The hybrid system may not start. (→P. 380) Also, the following systems must be initialized. l Power windows (→P. 51) l Variable gear ratio steering (→P. 153) l Tire pressure warning system (→P. 385) l Intuitive parking assist (→P. 153) 5 When trouble arises 477