Changing the engine switch positions

- “LOCK”
The steering wheel is locked and the key can be removed. (The key can be removed only when the shift lever is in “P”.) - “ACC”
Some electrical components such as the audio system can be used. - “ON”
All electrical components can be used. - “START”
For starting the engine.
Turning the key from “ACC” to “LOCK”

- Shift the shift lever to P.
- Push in the key and turn it to the “LOCK” position.
If the engine does not start
The engine immobilizer system may not have been deactivated. Contact your Toyota dealer.
When the steering lock cannot be released

When starting the engine, the engine switch may seem stuck in the “LOCK” position. To free it, turn the key while turning the steering wheel slightly left and right.
Key reminder function
A buzzer sounds if the driver’s door is opened while the engine switch is in the “LOCK” or “ACC” position to remind you to remove the key.
WARNINGWhen starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the accelerator pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
Caution when driving
Do not turn the engine switch to the “LOCK” position while driving. If, in an emergency, you must turn the engine off while the vehicle is moving, turn the engine switch only to the “ACC” position to stop the engine. An accident may result if the engine is stopped while driving.
NOTICETo prevent battery discharge
Do not leave the engine switch in the “ACC” or “ON” position for long periods of time without the engine running.
When starting the engine
- Do not crank the engine for more than 30 seconds at a time. This may overheat the starter and wiring system.
- Do not race a cold engine.
- If the engine becomes difficult to start or stalls frequently, have the engine checked immediately.
Test yourself
A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.