2011 Toyota Tundra Double Cab Owners Manual - Page 652

5-2. Steps to take in an emergency If the engine will not start If the engine still does not start after following the correct starting procedure (→P. 181) or releasing the steering lock (→P. 182), confirm the following points. n The engine will not start even when the starter motor operates normally. One of the following may be the cause of the problem. l There may not be sufficient fuel in the vehicle's tank. Refuel the vehicle. (→P. 107) Flex-fuel vehicles: The type of fuel may be different. When refueling, add the same type of fuel, if available. After adding a different type of fuel, the engine may run roughly and driving performance may be reduced for a while when the engine is first started. In this case, wait until the engine runs normally. l The engine may be flooded. Try to restart the engine once more following correct starting procedures. l There may be a malfunction in the engine immobilizer system. (→P. 112) n The starter motor turns over slowly, the interior lights and headlights are dim, or the horn does not sound or sounds at a low volume. One of the following may be the cause of the problem. l The battery may be discharged. (→P. 634) l The battery terminal connections may be loose or corroded. 628