Scania fault code 663
Code 663 is used by 6 different Scania systems. Choose the control unit shown in your diagnostic tool:
BMU Battery Management Unit
IBU software is overloaded
There is a fault in the IBU processor.
Read explanation →
MBS
Voltage supply, electrically powered wheelchair ramp
Implausible voltage supply detected by the control unit for electrically powered wheelchair ramp.
Read explanation →
CUV Visibility system
Dipped beam RH
Right-hand dipped beam has reduced brightness or does not illuminate at all.
Read explanation →
BCI
Short circuit, analogue input signal, expansion unit A (pin 20)
Short circuit to earth.
Read explanation →
CMS
Differential lock switch, first driving rear axle
The differential lock switch for the first driving rear axle (B11), connected to pins B4 and B6 on the control unit, is short circuited to voltage.
Read explanation →
APS Air Processing System
Pressure control
Air pressure in parking brake circuit has been above the permitted level.
Read explanation →