Scania fault code 637
Code 637 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
COO Coordinator
Accelerator pedal sensor
The accelerator pedal sensor indicates it is not in the released position.
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CUV Visibility system
Headlamp, right
Fault in communication to the internal control unit in the right-hand headlamp.
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BCI
Motor, CAN communication fault.
Faulty information regarding the engine.
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CMS
Switch, axle lift trailer
The signal from the instrument panel switch for axle lift trailer is implausible. The signal has been active for more than 180 seconds.
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