Scania fault code 774
Code 774 is used by 11 different Scania systems. Choose the control unit shown in your diagnostic tool:
EBS Electronic Braking System
Control unit
Incorrect or unreliable data.
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EMS Engine Management System
Steering wheel switch for cruise control, CAN messages missing
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BMU Battery Management Unit
Coolant pump (M38/M82) in the propulsion battery cooling system is not behaving properly
The coolant pump in the propulsion battery cooling system is not responding correctly to a request. The rotational speed of the coolant pump of the propulsion battery cooling syste…
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COO Coordinator
Switch for lane departure warning
The lane departure warning switch has been activated for an implausible amount of time.
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MBS
Luggage compartment door sensor, 1st centre right from rear axle, electrical fault
Faults have been detected to sensor for the 1st centre right luggage compartment door, counted from the rear axle. The measured voltage on the pin is 12 V.
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ELC Electronically controlled air suspension
Control box 1
The voltage on the input from the control box has been too low.
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DDU
Gearbox control unit, no CAN communication
The DDU control unit is not receiving CAN messages from the gearbox control unit.
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ICL Instrument Cluster
Communication with the gearbox management system (GMS)
No CAN messages from the gearbox management system.
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CMS
Pressure sensor for tag axle
The signal from the pressure sensor is implausible; the voltage is too low. Short circuit to ground in the pressure sensor.
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COMMUNICATOR Communicator (C200 / C300 / C400)
Communication with the coordinator (COO)
The RTC control unit has not received any CAN messages from the coordinator within the time expected.
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DCU
Door position sensor, rear door leaf
A fault has been detected in the door position sensor.
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