hey all i got a 89 tII with a microtech thats not getting a rpm signal. i tested the wires coming form the the cas to the computer and they got continuity(or there connected/carring a signal). is there any way for me to test the cas to see if its still good or not?

 

Pull the cas. Put a meter on the red wire and the white wire. Put the meter on a/c volts. Spin the cas gear. You should be able to get apporx 1.5 to 2vac out of it by spinning by hand. Do the same with the black/white and the green wire.

Either that or pull the plug off the ECU and get on the appropriate wires and spin the engine with the starter.

 

ohk thanxs

 

On a normal car the rpm signal comes from the bullet connector on the Trail Coil Assy. It is a blue/yellow wire. I suppose your micky tech does it differently since you asked the above question. But if it does not.....then go to the blue/yellow wire...bullet connector on the trail coil assy.

 

NO. It's a YELLOW wire with a BLUE stripe. NOT blue/yellow. http://www.teamfc3s.org/info/articles/demystifying.html

 

i think there is a write up about it on fc3spro.com Not sure though

 

wait froget it thats for a 86-88

 

There's a *writeup* on it about six posts above this one.

 

well i tested it with a multimeter and got about 0.400 v so im guessing its time to go buy one?

 

How do the two coils read out (resistance)? Between 110 and 200 ohms apiece, IIRC. Put the key of the CAS plug up, then read the two left side pins, then the two right side pins (I'm trying to do this from memory, so it might be vice-versa, don't shoot me, lol)