Scania fault code 540
Code 540 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
COO Coordinator
Ambient temperature sensor, passenger side
The supply voltage exceeds the threshold value.
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CUV Visibility system
Direction indicator
The input signal to the control unit from the direction indicator control indicates the right and left-hand signals at the same time.
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BCI
BIC program
Unexpected or prohibited event in the BIC program.
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