Scania DDU DTC 796 HMS control unit, no CAN communication

DDU DDU control unit · Scania

Code 796 (decimal). Some diagnostic tools show it in hexadecimal as 00031C.

In short

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

Applies to: DDU1 (DDU)

What does Scania DDU fault code 796 mean?

What causes Scania DTC 796?

How does the system react?

How to fix Scania DDU fault code 796?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included

Yearly plan: pay 10 months, get 12. Cancel at any time.

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

Code 796 in other Scania systems

Compare code 796 in every system →