Scania fault code 903
Code 903 is used by 5 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Temperature sensor 217, critically high temperature
The control unit interprets that the temperature sensor value is critically high above the permissible temperature.
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BMU Battery Management Unit
Propulsion battery, cell voltage exceeded critical level
The cell voltage has exceeded the safety limit in one of the battery modules. The cell voltage has been below 1.8 V or above 4.35 V.
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VDT
Automatic neutral
Invalid configuration.
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COO Coordinator
Coolant level
The control unit interprets that the coolant level is too low.
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MBS
#Not implemented. Short circuit on Drivers area fan output
Drivers area fan is not functional.
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