Scania COO DTC 843 CAN communication with switch module

COO Coordinator · Scania · 5 variants

Code 843 (decimal). Some diagnostic tools show it in hexadecimal as 034B.

In short

Fault in communication with the differential lock switch module.

Variant 1

Applies to: COO10 (COO)

What does Scania COO fault code 843 mean?

What causes Scania DTC 843?

How does the system react?

What are the symptoms?

How to fix Scania COO fault code 843?

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Variant 2

Applies to: COO11 (COO)

Variant 3

Applies to: COO8 (COO)

Variant 4

Applies to: COO9 (COO)

Variant 5

Applies to: COO8

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

Code 843 in other Scania systems

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