2006 Lexus GS 300 Owners Manual - Page 1118

IN CASE OF AN EMERGENCY CAUTION When making the connections, to avoid serious injury, do not lean over the battery or accidentally let the jumper cables or clamps touch anything except the correct battery terminals or the ground. 5. Charge the discharged battery with the jumper cables connected for approximately 5 minutes. At this time, run the engine in the vehicle with the booster battery at about 2000 rpm with the accelerator pedal lightly depressed. 6. Start your engine in the normal way. After starting, run it at about 2000 rpm for several minutes with the accelerator pedal lightly depressed. 7. Carefully disconnect the cables in the exact reverse order: the negative cable and then the positive cable. 8. Carefully dispose of the battery cover cloths which may now contain sulfuric acid. 9. If removed, replace all the battery vent plugs. The engine may not restart even after battery charging or replacement. If this happens, see "(d) Starting the engine after a battery discharge". If the cause of your battery discharging is not apparent (for example, lights left on), you should have it checked at your Lexus dealer. If the first start attempt is not successful...Check that the clamp on the jumper cables are tight. Recharge the discharged battery with the jumper cables connected for several minutes and restart your engine in the normal way. If another attempt is not successful, the battery may be depleted. Have it checked at your Lexus dealer. (d) Starting the engine after a battery discharge In the event that the battery is discharged, the engine may not restart even after the battery is recharged or replaced. For safety reasons, the engine may be disabled when battery voltage is extremely low. If the engine is disabled, the start system must be normalized. To normalized the start system: 1. Shift the transmission to the "P" position and set the engine switch off. 2. Open and close any of the doors. 3. Start the engine. 472