Scania BCI DTC 669 Short circuit, analogue input signal, expansion unit D (pin 20)

BCI BCI control unit · Scania · 3 variants

Code 669 (decimal). Some diagnostic tools show it in hexadecimal as 029D.

In short

Short circuit to earth.

Variant 1

Applies to: BCI1 (BWE)BCI2 (BWE)

What does Scania BCI fault code 669 mean?

What causes Scania DTC 669?

How does the system react?

How to fix Scania BCI fault code 669?

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Variant 2

Applies to: BCI2 (BWE)

Variant 3

Applies to: BCI3 (BWE)

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

Code 669 in other Scania systems

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