Scania DCU DTC 789 Emergency opening system reset valve A, output, open circuit

DCU DCU control unit · Scania

Code 789 (decimal). Some diagnostic tools show it in hexadecimal as 0315.

In short

The door control unit has detected a current that is too low in reset valve B for the emergency opening system (CN6-11).

Applies to: DCU3 (DCUA)DCU3 (DCUF)DCU3 (DCUM)DCU3 (DCUR)

What does Scania DCU fault code 789 mean?

What causes Scania DTC 789?

How does the system react?

What are the symptoms?

How to fix Scania DCU fault code 789?

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

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