2003 Toyota Prius Owners Manual - Page 180

Discharged battery Jumper cable 50p045b Negative terminal ("-" mark) Booster battery 50p043a 10. Start the hybrid system. Make sure the "READY" light is on. If the hybrid vehicle battery warning light comes on in the multi-information display, the hybrid vehicle battery is also discharged. Contact your Toyota dealer. 11. Carefully disconnect the cables in the exact reverse order: the negative cable and then the positive cable. 12. Carefully dispose of the battery cover cloths-they may now contain sulfuric acid. c. Connect the clamp of the negative (black) jumper cable to the negative (-) terminal on the booster battery. d. Connect the clamp at the other end of the negative (black) jumper cable to a solid, stationary, unpainted, metallic point of the vehicle with the discharged battery. The recommended connecting point is shown in the following illustrations: Connecting point 13. If removed, replace all the battery vent plugs. If the cause of your auxiliary battery discharging is not apparent (for example, lights left on), you should have it checked at your Toyota dealer. 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. 173