2005 Lexus GX 470 Owners Manual - Page 519

IN CASE OF AN EMERGENCY JUMP STARTING PROCEDURE 1. If the booster battery is installed in another vehicle, make sure the vehicles are not touching. Turn off all unnecessary lights and accessories. When boosting, use the battery of matching or higher quality. Any other battery may be difficult to jump start with. If jump starting is difficult, charge the battery for several minutes. 40PY054 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. " 5 Discharged battery 6 Booster battery 1 2 3 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. 494