Forums Technical Discussions Understanding the Battery Voltages, Health.

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    mathewantonyjohnmathewantonyjohn
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    @mathewantonyjohn

    Battery voltage can be seen from the MID.

    Normal Readings

    While the vehicle is off and not running:  approx. 12 volts

    During Standby: approx. 12 volts

    During Cranking: 7-10 volts

    After Starting/Running:  13-14.5 volts
    ( this is in fact the charging voltage from the alternator that is shown here.)
    (if the voltage shown is approx. 12volts or equal to the standby voltage, the charging is not taking place and check the alternator asap.)

     

    Batteries degrade over time!

    If you see that the starter motor is straining to get the engine running, this is a sign that the battery may be reaching its end of life. ( Faulty glow plugs may also cause strain to the starter motor and during a cold start and will cause more time to start the engine).

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