3b s2 coupe resurrection

[newsh]

That's 3B anyway..

[andy10v]

S2 central says 0v ground for G61, G66. G69, F96, G62, G42 on an ABY.

[newsh]

http://www.s2central.net/S2_Schematics/B/B73-05.pdf

[newsh]

Pin 33 or Pin 30?

[andy10v]

33 is n75, and working during output test.

30 is the one that said ground but appears to be a 0v reference.

[twoqu]

I think its a bit confusing as Paul N used 0V instead of ground or earth.

[andy10v]

Back to plan B, burn it.

Enough for tonight, thanks for the help gents

[martinws]

it sucks that you are still chasing this. If you need to borrow my ABY ecu or any other bits let me know. my 90 will be off the road for a while now i think.

[andy10v]

it sucks that you are still chasing this. If you need to borrow my ABY ecu or any other bits let me know. my 90 will be off the road for a while now i think.

Yeah I thought I was getting somewhere Next track day is Wed 13th of May.

I am going to borrow a spare ECU from Alex, at least that way if it gets fried its a spare rather one from a car being used.

Do you have more than just a drive shaft you want to replace?

[twoqu]

Think this may be a false lead. Any of the major grounds would have a cable brown in colour as far as I can make out!
If its black and lilac its the screening for the sensors such as knock sensor etc. At least that true for the 3b loom!

[andy10v]

Think this may be a false lead. Any of the major grounds would have a cable brown in colour as far as I can make out!
If its black and lilac its the screening for the sensors such as knock sensor etc. At least that true for the 3b loom!

Yup I think you are right.

[twoqu]

Looks like the main ecu earths are pins 10 14 19 24 on both 3B and ABY and pin 30 serves the same purpose on both as well. Presumably you didn't need to touch these to convert to COP.

[andy10v]

Correct, none of those have been touched.

[newsh]

Pin 30 is the return path for all those devices, not exactly a ground but serves the same purpose AFA the ECU is concerned.. I think it must be ok or none of the O/P tests would work.

E14 in this http://www.s2central.net/S2_Schematics/B/B73-02.pdf

and this http://www.s2central.net/S2_Schematics/B/B73-03.pdf

[twoqu]

I think we are chasing our tail a bit!
Basically we know the injectors are not being grounded by the ecu for some reason. I would check the continuity back to the inlet manifold ring. Then continuity back from the inlet to the ecu. If thats all intact then check the ground pins mentioned above for continuity with a good chassis ground. Then that leaves either the connector or the ecu!
Might have some input tomorrow if I can find that spare loom!