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Bosch LSU 0 258 007 084 and Subaru EJ204 with VVT and 4 individual coils

Practical Motorsport Wiring - Club Level

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Dear friends!

I am fixing a Subaru Impreza now with swapped engine. Now it is EJ204 with VVT and 4 individual coils average atmospheric engine with stock ECU (Donor is Subaru Legacy BH5-197858 (1998-2001 production year). Problem is how Bosch LSU works. Without diving too deep i assumed that wires are connected wrong cuz all harness was reconnected. I have an average pinout of my ECU 22611 AG471 A18-000 D9C without explanation of designated signal i should see at each pin, only colors. It is useless to check wires by colors cuz wiring harness is not original and looks more like frankenstine. So my question is:

1)IS THERE SOMEONE WHO HAVE A PINOUT FOR ECU 22611 AG471 A18-000 D9C WHERE I CAN FIND WHICH WIRE FROM BOSCH 0 258 007 084 SHOULD GO.

2) BOSCH 0 258 007 084 IS A LSU 4.2 OR 4.0? WHICH WIRING PINOUT I SHOD SEARCH FOR?

3) ANY IDEA OF PINOUT FOR BOSCH 0 258 007 084.

Thanks in advance!

I'll be glad to receive any idea.

I'm pretty sure a Bosch 0 258 007 xxx sensor is LSU 4.2. The pinout depends on the connector type.

My first connector looks exactly like this

https://www.ebay.ie/itm/193690177153?hash=item2d18d58e81:g:0esAAOSwVPFfdMK0&amdata=enc%3AAQAHAAAAoDaYsaAE7hYNAy4%2FoAmGaM%2ByRrSywuGUX%2BzRB1PBmjKioilGy61oNzWbQfytXS%2FxTCT6vCJhxxZ5dyeg4BWpRKNElCgZp6zZYsDBCwxMLCv22XG0%2Bc%2BUZ7gDnLianzP4Lcw2K7anOfF1AMS6rfLUXvpN%2BWhu70r8yTEBmU9wimg2chHUIvSHobKVhzSWqTJKJUi%2FQ9Qz4TrQ0xc1aWy6GPQ%3D%7Ctkp%3ABk9SR6ja5Na3YQ

But because this is a frankenstine swap, there is one more connector in harness that leads to ECU then. And bunch of sad story connecting these original Bosch connector and harness connector.

That is why i am searching for pinout for ECU and LSU. After 4 days of me dancing around this car it finally works good till LSU turns on,and then it drags trims to -30% instantly. And car tries to stall. Either bad LSU or poor connection.

Looks like i've found pinout for this LSU 4.2

Now remaining only pinout for ECU 22611 AG471 A18-000 D9C with designated signal for each pin.

Originally pins - 93, 94, 101,102 are used in pin B134 on ECU.

Attached Files

Resolved. 2 wires were swapped. Now working normally, but anyway, needs a new sensor.

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