hey guys,

the black plug is part of the loom that down the right hand guard





v4 sti dccd loom. also looks like it has thermal wrapping on a few of the wires.

any help appreciated.

dan

Possibly for diagnostics, pretty sure my V3 has the same thing just hanging there too.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.

nah its not the diagnostics plug,

bit of an update, ive got a standard v4 wrx wiring main harness laying around and it turns out the black plug fits into this one.



now the wiring loom that i hate in the car (v4 sti dccd) does not have this.

hmmm any ideas? test light and trace it?

the wrapping on the wires is a special sheilding to help stop interference from emi. could be for a speed sensor for the engine, or air flow meter, something with a really small and critical signal

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Version 6 STI

getting closer. i did a bit with the test light.

i started tracing the plug on the v4 wrx non dccd main loom with a test light and this is what i found.



so by using these pinouts

http://www.polarperformance.co.uk/MY97-98PinOut2.html

http://www.northursalia.com/modifica...g/v3and4-1.jpg

pins 4 and 5 on the ecu are data check connectors.

hmmmmmmmm