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Harvey,
In my (USA) service manual, Chapter 3.2 (Automatic Transmission and Differential), Section T4 (Transmission Control Unit I/O Signal). There is a table showing what each pin on the ECU is for.
If your Aussie manual has a similar table, could you tell me what it says about pins 11 and 17 of B66 and pin 6 of B68. I'm starting to get an idea now about how the TCU works. Looks like connectors B66 and B67 are all inputs and B68 is the outputs.
Phil.
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Subaru ECU and TCU Website
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