2007 Lexus SC 430 Owners Manual - Page 306

5-2. Steps to take in an emergency If the vehicle has a discharged battery The following procedures may be used to start the engine in the event the vehicle's battery is discharged. You can call your Lexus dealer, Roadside Assistance or Lexus Customer Service Assistance. If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start your Lexus following the steps below. Connecting the jumper cables. 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.) 1 2 3 4 Positive (+) battery terminal on your vehicle. Positive (+) battery terminal on the second vehicle. Negative (-) battery terminal on the second vehicle. Connect the jumper cables to ground on your vehicle as shown in the illustration. 5 When trouble arises Start the engine of the second vehicle. Increase the engine speed slightly and maintain at that level for approximately five minutes. 291