Toyota 2014 Sienna Manual page 787

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Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
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To prevent battery discharge
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Turn off the headlights and the audio system while the engine is off.
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Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic.
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When the battery is removed or discharged
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The power sliding door (if equipped) must be initialized. (P. 74)
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The power back door (if equipped) must be initialized. (P. 87)
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Make sure that the key is not inside the vehicle when recharging or
replacing the battery. The key may be locked in the vehicle if the alarm is
activated. (P. 165)
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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 cer-
tain 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.)
SIENNA_OM_OM45483U_(U)
5-2. Steps to take in an emergency
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