Scania fault code 1556
Code 1556 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
TMS Transmission Management System
Oil distribution piston position sensor, unreasonable resistance in the position sensor coil
The control unit indicates that the value of the resistance in the coil of the position sensor is not reliable.
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BMU Battery Management Unit
Electrical power take-off R126, fault in the positive contactor and negative contactor
After the contactors opened, voltage class B was detected from the electrical power take-off.
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ALLISON Allison automatic gearbox
Fault on torque limiter between engine and gearbox
Engine does not respond to gearbox request for torque reduction.
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