Scania CMS DTC 769 Engine start switch signal

CMS CMS control unit · Scania

Code 769 (decimal). Some diagnostic tools show it in hexadecimal as 0301.

In short

The voltage on control unit pin B4 is too low.

Applies to: CMS1 (CMS)

What does Scania CMS fault code 769 mean?

The voltage on control unit pin B4 is too low.

What causes Scania DTC 769?

Fault in the cable harness or in the 3-position switch in the switch module in the engine compartment.

What are the symptoms?

The engine cannot be started.

How to fix Scania CMS fault code 769?

  1. Check: - 3-position switch for engine start in the engine compartment.
  2. Connections and cable harness between the 3-position switch and the CMS control unit.

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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