2009 Lexus GX 470 Owners Manual - Page 411

5-2. Steps to take in an emergency If the vehicle battery is discharged The following procedures may be used to start the engine if the vehicle's battery is discharged. You can call your Lexus dealer, or qualified repair shop. 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 by following the steps below. STEP 1 STEP 2 Open the hood. Connecting the jumper cables. 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 3 Start the engine of the second vehicle. Increase the engine speed slightly and maintain at that level for approximately 5 minutes to recharge the 12 volt battery of your vehicle. STEP 4 Maintain the engine speed of the second vehicle and start your vehicle's engine. 416