Scania DDU DTC 788 TSS control unit, no CAN communication

DDU DDU control unit · Scania

Code 788 (decimal). Some diagnostic tools show it in hexadecimal as 000314.

In short

The DDU control unit is not receiving CAN messages from the TSS control unit.

Applies to: DDU1 (DDU)

What does Scania DDU fault code 788 mean?

The DDU control unit is not receiving CAN messages from the TSS control unit.

What causes Scania DTC 788?

- The TSS control unit is not connected to the cable harness for CAN communication. - The fuse of the TSS control system has tripped.

How does the system react?

Red warning indication of a tag axle steering system fault is displayed.

How to fix Scania DDU fault code 788?

  1. Check the harness-to-component connector for the TSS control unit.
  2. Check the fuse for the TSS control system.
  3. Check the cable harness for CAN communication.
  4. Spare part program the DDU control unit.

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

Code 788 in other Scania systems

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