Scania TCC DTC 781 TCC control unit, high supply voltage

TCC TCC control unit · Scania

Code 781 (decimal). Some diagnostic tools show it in hexadecimal as 030D.

In short

The control system warns that the voltage supply has risen above 32 V.

Applies to: TCC3 (TCC)

What does Scania TCC fault code 781 mean?

The control system warns that the voltage supply has risen above 32 V.

What causes Scania DTC 781?

The supply voltage is over 32 V.

What are the symptoms?

The TCC control unit does not work or has limited functionality.

How to fix Scania TCC fault code 781?

  1. Check the supply voltage to the TCC control unit.
  2. Check all harness-to-harness connectors to the TCC controller.
  3. Check whether other systems have the same fault code.
  4. No action is required if an auxiliary starting device has been used.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 781 in other Scania systems

Compare code 781 in every system →