2009 Lexus LX 570 Owners Manual - Page 676

5-2. Steps to take in an emergency If required, remove all 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.) Positive (+) battery terminal on your vehicle Positive (+) battery terminal on the second vehicle Negative (-) battery terminal on the second vehicle Connect the jumper cable to ground on your vehicle as shown in the illustration. STEP 2 Start the engine of the second vehicle. Increase the engine speed slightly and maintain at that level for approximately 5 minutes to recharge the battery of your vehicle. STEP 3 Open and close any of the doors with the "ENGINE START STOP" switch off. STEP 4 Maintain the engine speed of the second vehicle and turn the "ENGINE START STOP" switch to IGNITION ON mode, then start the vehicle's engine. STEP 5 Once the vehicle's engine has started, remove the 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. 682