Scania fault code 631
Code 631 is used by 8 different Scania systems. Choose the control unit shown in your diagnostic tool:
BMU Battery Management Unit
Fault in pre-charging of the contactor unit
Timeout because the time for pre-charging is above 1 s. The energy of the pre-charge is above 385 J.
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VDT
Internal fault
Implausible message via CAN.
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COO Coordinator
High split
The voltage in the high split solenoid valve circuit has been low for longer than permitted.
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CUV Visibility system
Daytime running light/position lamp, right
Fault in the daytime running light/position lamp temperature sensor in the right-hand headlamp.
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BCI
Gearbox status, CAN communication fault
Faulty information regarding the gearbox status.
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CMS
Switch, storing of vehicle level adjustment
The signal from the instrument panel switch for storing vehicle level adjustment is implausible. The signal has been active for more than 180 seconds.
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EST
The vehicle runs in limp home mode.
A fault has been detected in the tag axle steering system. The system is in limp home mode.
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ESTA
The vehicle runs in limp home mode.
A fault has been detected in the tag axle steering system. The system is in limp home mode.
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