Tesla MODEL Y 2012 Owner's Manual page 252

Troubleshooting Alerts
(VCFRONT_a402)
Electrical system backup power is unavailable
Vehicle will consume more energy while idle
The backup power source for the electrical system, the low voltage battery, is not available or cannot provide the
voltage required to support all vehicle features.
The primary source of electrical power, the high voltage battery system, will continue to support vehicle functions,
even when your vehicle is idle. For more information on the high voltage battery, see About the High Voltage Battery
on page 160.
You may notice that your vehicle consumes more energy than usual when you are not driving it, or that your vehicle
displays a lower projected range than you would normally expect after charging. This is normal vehicle behavior
when this alert is present, and it will continue until the backup power source is restored.
You may also notice that some nonessential features are not available. This is expected behavior due to your vehicle
preserving energy for essential functions.
It is recommended that you limit or avoid the use of any nonessential features. This can help your vehicle maintain
adequate electrical power for essential functions.
There is a chance that an issue affecting the primary power source could cause your vehicle to shut down
unexpectedly.
It is recommended that you schedule service at your earliest opportunity, so the backup power source for the
electrical system can be restored.
(VCFRONT_a478)
Low voltage battery service is required
Schedule service - Vehicle may not restart
The low voltage battery cannot provide the electrical support necessary to drive or continue driving.
If this alert is present while you are driving, your vehicle needs to come to a stop as soon as possible. Pull over safely
at your earliest opportunity.
It is possible your vehicle will shut down unexpectedly. It is also possible that your vehicle will not restart after the
current drive.
You may notice that some nonessential features are not available. This is expected behavior due to your vehicle
preserving energy for essential functions.
It is recommended that you eliminate or reduce your use of any nonessential features. This can help your vehicle
maintain adequate electrical power for essential functions other than driving, until it can be serviced.
If this alert remains present, it is recommended that you schedule service immediately. Without service, your vehicle
may not drive, may shut down unexpectedly, or may not restart.
(VCFRONT_a496)
Vehicle is preparing to shut down
PULL OVER SAFELY
The electrical system cannot provide adequate support to drive or continue driving. Your vehicle is preparing to shut
down to preserve energy for essential functions other than driving.
Your vehicle cannot be driven or continue driving while this condition continues.
If this alert is present while you are driving, your vehicle needs to come to a stop as soon as possible. It is
recommended that you:
250 MODEL Y Owner's Manual