Scania EMS DTC 4522 Relay to injectors R652

EMS Engine Management System · Scania · 2 variants

Code 4522 (decimal). Some diagnostic tools show it in hexadecimal as 11AA.

In short

Open circuit in cable harness to injectors' relay.

Variant 1

Applies to: EMS S7EMS S8

What does Scania EMS fault code 4522 mean?

What causes Scania DTC 4522?

How does the system react?

How to fix Scania EMS fault code 4522?

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Variant 2: Injector cylinder 6, short circuit to earth

Applies to: EMS10

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