Hi all, I have a semi urgent question here, what wire on the ECU plug carries the CAS signal?
I've tried following the FSM wiring diagram but I'm still not sure, anyone care to have a guess?

 

FSM knows best. Most other people would just consult that if trying to find an answer for you. Don't have a FSM myself.

 

there are 2. 1p and 1q on S4

4a-30 or 4b-31 in FSM

 

Actually there are four wires from the CAS to the ECU; pins 1N, 1P, 1T and 1Q.

Wiring diagrams page 50-22.

 

Ookkay!
thanks people!
I was looking on the wrong page!

Now one more question, anyone if the ECU has a tacho output? I'm pretty sure the actual tacho gets its signal straight from the coil/ignitor, but does the ECU have an output that could be used for it? (ie, leading coil/ignitor output?)

 

Ok just did a bit of a dig around the FSM, am I too assume I should be using the trailing coil pack for a tacho?

 

Yep, there's even a little bullet connector on the trailing coil's loom you can plug straight into.

 

Cool, done that now, but what is the reason behind using the trailing coil as a tacho input not the leading one??

I used to know it but i've forgotten now.

 

It doesn't matter, both will give the same signal. The trailing's closer to the cabin though, so why go further?

 

https://www.rx7club.com/forum/attach...&postid=580160

https://www.rx7club.com/forum/attach...postid=1398836

 

thanks for that HAILERS.

Now just one more question for you gurus, I've now used the connector (as shown in the last image HAILERS posted) the yellow/light blue wire.
NOW! the car beeps when im driving!

it's the same sound you get when you have the handbrake off and the car starts rolling

 

Does it stop beeping if you unplug the connection to the coil?

 

Yes, only beeps if I have my connection there...

The connection is actually for a ign trig pulse to my microtech.

However that shouldn't matter one bit..