2005 Toyota Prius Owners Manual - Page 252

If your vehicle will not start- (a) Simple checks Before making these checks, make sure you have followed the correct starting procedure given in "How to start the hybrid system" on page 234 and that you have sufficient fuel. Also check whether the other keys will start the hybrid system. If they work, your key may be broken. Have the key checked at your Toyota dealer. If none of your keys work, there may be a malfunction in the hybrid vehicle immobilizer system. Call your Toyota dealer. (See "Keys" on page 20.) If the instrument cluster dims or the instrument cluster display turns off with the hybrid system on- 1. Check that the auxiliary battery terminals are tight and clean. 2. If the auxiliary battery terminals are O.K., the auxiliary battery is discharged. You may try jump starting. See "(b) Jump starting" for further instructions. If the instrument cluster is shown in appropriate brightness with the hybrid system is in the "IG−ON" mode- The hybrid vehicle system is suspected to be faulty. Contact your Toyota dealer. (b) Jump starting If the auxiliary battery is discharged, the hybrid system can be started by jump starting. Depending on the vehicle condition, the engine may not start. To avoid serious personal injury and damage to your vehicle which might result from battery explosion, acid burns, electrical burns, or damaged electronic components, these instructions must be followed precisely. If the auxiliary battery is discharged, you cannot access to the auxiliary battery in the luggage compartment because the back door cannot be opened. Use the exclusive jump starting terminal in the engine compartment. For details, see "JUMP STARTING PROCEDURE" on page 243. NOTICE If the auxiliary battery is discharged with the transaxle in "P", your vehicle cannot be moved unless the front wheels are raised. This is because the front wheels are locked by means of the parking lock mechanism. If you are unsure about how to follow this procedure, we strongly recommend that you seek the help of a competent qualified technician or towing service. NOTICE Hybrid vehicles started. cannot be push− 242