Jun 10, 2017 (3 years ago)
Sorry no idea how to get my wiring diagram of one program and onto website,
Mechanic not computer geek!
All I can do is suggest testing at the ECU/plug,
plug "A" CTS terminal are ECU 8 (blue) and terminal 45 (brown/red).
One of those is going to be +V and the other is signal return.
Ignore my other advice I had the wrong diagram up.
Also that car has an instrument panel ECU chip,
Fed by fuse 13 and grounding through the ECU terminals # 2/13/14/27 and 37.
So it might be possible to check the dash by grounding T#2 13 or 14 to see which triggers the temp lamp,
And it might be easier to bite the bullet and buy a manual.