Scania fault code 749
Code 749 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
TMS Transmission Management System
BMU control unit, unexpected value on CAN message
The BMU control unit interprets an unexpected value in the CAN message from the battery unit.
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COO Coordinator
Switch for trailer tag axle
The switch has been active an implausible amount of time.
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BCI
Sensor for the seat on the engine tunnel, short circuit to earth
The BCI control unit indicates a short circuit to earth, i.e. pin B8 or pin B12.
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CMS
Brake pressure sensor for tag axle
Implausible signal from the brake pressure sensor.
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