Scania fault code 721
Code 721 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
TMS Transmission Management System
No CAN message from BCI control unit
An expected CAN message is missing.
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COO Coordinator
Transmission oil temperature sensor
The transmission oil temperature sensor (T130) has indicated an implausible value.
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BCI
Low voltage, analogue input signal, expansion unit B (pin 20)
Implausible signal, voltage too low.
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CMS
Equaliser
Control unit pin A24 indicates 12 V and interprets the equaliser as not being connected or as the circuit being open.
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