Toyota Sienna 2010-2024 Owners Manual: If the battery is
discharged
The following procedures may be used to start the engine if the
vehicle’s battery is discharged.
You can call your Toyota dealer or qualified repair shop.
If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.
- Vehicles with an alarm system:
Confirm that the electronic key
is being carried.
When connecting the jumper
(or booster cables, depending
on the situation, the alarm may
activate and doors locked.
- Open the hood.
- Remove the engine cover.
Lift the edge of the cover to fixed
pins, and then pull the cover
towards you to remove.
- Connect the jumper cables according to the following procedures:
- Connect a positive jumper cable clamp to the positive (+) battery
terminal on your vehicle
- Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle
- Connect a negative cable clamp to the negative (-) battery terminal
on the second vehicle
- Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the battery
and any moving parts, as shown in the illustration.
- Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the battery of your vehicle.
- Vehicles with a smart key system only: Open and close any of the
doors of your vehicle with the engine switch off.
- Maintain the engine speed of the second vehicle and start the
engine of your vehicle by turning the engine switch to the “ON”
position (vehicles without a smart key system) or turning the engine
switch to IGNITION ON mode (vehicles with a smart key system).
- Once the vehicle’s engine has started, remove the jumper cables in
the exact reverse order from which they were connected.
- To install the engine cover, conduct the removal procedure in
reverse. After installing, check that the fixed pins are inserted
securely.
Once the engine starts, have the vehicle inspected at your Toyota
dealer as soon as possible.
Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
To prevent battery discharge
- Turn off the headlights and the audio system while the engine is off.
- Turn off any unnecessary electrical components when the vehicle is
running
at a low speed for an extended period, such as in heavy traffic.
When the battery is removed or discharged
- The power sliding door (if equipped) must be initialized.
- The power back door (if equipped) must be initialized.
Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of
certain
electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
WARNING Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting
the flammable
gas that may be emitted from the battery:
- Make sure the jumper cable is connected to the correct terminal
and that it
is not unintentionally in contact with any other than the intended
terminal.
- Do not allow the other end of the jumper cable connected to the
“+” terminal
to come into contact with any other parts or metal surfaces in the
area,
such as brackets or unpainted metal.
- Do not allow the + and - clamps of the jumper cables to come
into contact
with each other.
- Do not smoke, use matches, cigarette lighters or allow open
flame near
the battery.
Battery precautions
The battery contains poisonous and corrosive acidic electrolyte,
while
related parts contain lead and lead compounds. Observe the following
precautions
when handling the battery:
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NOTICE When handling jumper cables
When connecting the jumper cables, ensure that they do not become
entangled
in the cooling fans or belt.
To prevent damage to the engine cover
- When removing the cover, make sure that you pull the cover
towards you
after lifting the front edge to remove the fixed pins.
- When installing the cover, do not force the cover or subject it
to strong
shocks.
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Shift the shift lever to P and apply the brakes.
Touch the Toyota emblem side
of the electronic key to the
engine switch.
An alarm will sound to indicate that
the start function canno ...
The following may indicate that your vehicle is overheating.
The needle of the engine coolant temperature gauge
enters the red zone or a loss of engine power is experienced. (For
example, the ...
Other materials:
Things you should know
If you notice any symptoms
If you notice any of the following symptoms, refer to the likely cause
and the solution, and re-check.
If the symptom is not resolved by the solution, have the vehicle
inspected by your Toyota dealer.
Likely cause
Solution
The ima ...
Perform zero point calibration of yaw rate and deceleration sensor (when
using intelligent tester)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Operate the intelligent tester to erase the codes
(select "RESET MEMORY").
HINT:
Refer to the intelligent tester operator's manual for
further details.
(d) Using the intell ...
Ignition Switch Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, battery positive
voltage is applied to terminal IG of
the ECU. When battery positive voltage is applied to terminal IG of the ECU
while the theft deterrent
system is operating, the warning stops.
WIRING DIAGRAM
INSPECTIO ...