HeaterHeater  - For pleasant driving - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

The heater can only be used while the engine is running.

See also:

Vehicle dimensions
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Odometer/Tripmeter
The operation method is the same as when the ignition switch is “OFF”. Refer to “Odometer/Tripmeter” for further details. ...

If the warning lamp/display illuminate while driving
If only the ABS warning lamp/display illuminate Avoid hard braking and high-speed driving. Stop the vehicle in a safe place. Restart the engine and check to see whether the lamp goes out after a few ...