Scania fault code 40
Code 40 is used by 5 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Control unit
Incorrect or unreliable data.
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VDT
Rotational speed sensor
Fault in the signal or poor signal quality. The rotational speed sensor voltage is too high. The rotational speed sensor signal cannot be processed if the voltage exceeds 13 V.
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COO Coordinator
Outdoor temperature sensor
The voltage in the outdoor temperature sensor circuit has been either above or below the permitted level.
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ABS Anti-lock Braking System
Wheel speed
Wheel slip has continued for at least 16 seconds on the right-hand side of the front axle.
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CUV Visibility system
CAN message
There is no CAN message from the tachograph.
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