Scania ALM DTC 578 Bodybuilder connection indicator for activated alarm, short circuit

ALM ALM control unit · Scania · 2 variants

Code 578 (decimal). Some diagnostic tools show it in hexadecimal as 0242.

In short

The bodybuilder connection indicator for activated alarm is short-circuited to voltage supply.

Variant 1

Applies to: ALM1 (ALM)

What does Scania ALM fault code 578 mean?

What causes Scania DTC 578?

How does the system react?

What are the symptoms?

How to fix Scania ALM fault code 578?

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
Get Premium – 7,50 € / month I already have an account

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

Variant 2

Applies to: ALM1

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

Code 578 in other Scania systems

Compare code 578 in every system →