2008 Toyota Prius Owners Manual - Page 479

5-2. Steps to take in an emergency STEP 4 Start the engine of the second vehicle. Increase the engine speed slightly and maintain at that level for approximately five minutes to recharge the 12 volt battery of your vehicle. Open and close any of the doors with the "POWER" switch OFF. Maintain the engine speed on the second vehicle and turn the "POWER" switch to the ON mode, then start the vehicle's engine. Make sure the "READY" light comes on. If the "READY" light will not come on and the hybrid system will not start after you recharge the battery, do the following procedure. Turn the hybrid system off. Open and close the driver's door. Then push the "POWER" switch briefly and firmly. If the light does not come on, contact your Toyota dealer. Once the vehicle's engine has started, remove the jumper cables in the exact reverse order in which they were connected. STEP 5 STEP 6 STEP 7 STEP 8 Once the engine starts, have the vehicle checked at your Toyota dealer as soon as possible. 5 When trouble arises n Starting the hybrid system when the battery is discharged The hybrid system cannot be started by push-starting. n Avoiding a discharged 12 volt battery l Turn off the headlights and the audio system while the hybrid system is turned off. l Turn off any unnecessary electrical components when the vehicle is running at a low speed for an extended period, such as in heavy traffic, etc. 453 PRIUS_U_(L/O_0802)