Applies to: TMS3 (TMS)
What does Scania TMS fault code 277 mean?
Short circuit or open circuit to the electric motor phases on the electric clutch actuator.
What causes Scania DTC 277?
- Fault in component in the electric motor. - Fault in the electric motor control system, power missing to disengage quickly. - Loss of engine torque due to overheating.
How does the system react?
- A yellow warning indication is displayed. - If the vehicle is stationary when the fault occurs: neutral position is activated, which prevents the vehicle from being driven further. - If the vehicle is driving when the fault occurs: the gear continues in locked position. Neutral (N) is activated when the vehicle slows to a stop. This prevents the vehicle from being driven further.
How to fix Scania TMS fault code 277?
- Check the cable harness and connectors for the electrical air compressor.
- Renew the electrical clutch actuator.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.