Scania ALM DTC 551 Micro switch reserved pin (truck)/micro switch A10 (bus), short circuit

ALM ALM control unit · Scania

Code 551 (decimal). Some diagnostic tools show it in hexadecimal as 0227.

In short

The micro switch is short-circuited to the voltage supply.

Applies to: ALM1 (ALM)

What does Scania ALM fault code 551 mean?

What causes Scania DTC 551?

How does the system react?

What are the symptoms?

How to fix Scania ALM fault code 551?

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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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