Scania fault code 634
Code 634 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
BMU Battery Management Unit
unused, available
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CUV Visibility system
Internal control unit, right-hand headlamp
Fault in the internal control unit in the right-hand headlamp.
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BCI
Information fault, engine speed
Faulty information regarding the engine speed.
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CMS
Switch, inhibit automatic kneeling
The signal from the instrument panel switch for inhibiting automatic kneeling is implausible. The signal has been active for more than 180 seconds.
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