2002 Lexus GS 430 Owners Manual - Page 229

IN CASE OF AN EMERGENCY 2. If required, remove all the vent plugs from the booster battery. Lay a cloth over the open vents on the booster battery. (This helps reduce the explosion hazard, personal injuries and burns.) If the booster battery is an extended maintenance interval battery, it is not necessary to remove the vent plugs. 3. If the engine in the vehicle with the booster battery is not running, start it and let it run for about 5 minutes. During jump starting, run the engine at about 2000 rpm with the accelerator pedal lightly depressed. 4. Locate positive (+) and negative (-) terminals of each battery. Connect the jumper cables in the exact order ( 1 2 3 4 ) shown in the illustration. 1 2 3 4 Connect a positive (red) jumper cable clamp to the positive (+) terminal of the discharged battery. Connect the clamp at the other end of the positive (red) cable to the positive (+) terminal of the booster battery. Connect a negative (black) cable clamp to the negative (-) terminal of the booster battery. Connect the clamp at the other end of the negative (black) cable to a solid, stationary, unpainted metallic point (such as shown in the illustration) away from the battery. Do not connect it to or near any part that moves when the engine is cranked. 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. Start your engine in the normal way. After starting, run it at about 2000 rpm for several minutes with the accelerator pedal lightly depressed. 6. Carefully disconnect the cables in the exact reverse order: the negative cable and then the positive cable. 7. Carefully dispose of the battery cover cloths which may now contain sulfuric acid. 8. If removed, replace all the battery vent plugs. If the cause of your battery discharging is not apparent (for example, lights left on), you should have it checked. 212