A friend of mine is having problems with their squirt.

There is no power to D15 (warm up) and D16 (accel) from their respective pins on the CPU. (ie pin 8 on CPU to Pin 2 of Q7; Pin 9 of CPU to pin 2 of Q8) D14 (Inj Pulse) is lit.

I have various schematics from msefi but I need to know where the CPU gets its info to fire these pins.

Possible fried CPU? I do get IAT, CLT and O2 values that are appropriate.

Thanks!

 

The CPU lights these by setting pins 8 and 9 high to switch a transistor through a simple circuit:



If you have a logic probe, you can check the CPU pins. Then follow the circuit through, checking the bases of Qs 7 and 8.

 

Unfortunately, your photo is not coming through

I placed the computer on my car and D15/D16 light but are very dim. I know the Harness/grounds are good on my car as i have my car running (finally!!) on a MSII with same "build" setup.

Just to reiterate...I have TPS, O2, CLT, IAT and MAP values on MegaTune/Tunerstudio and with the stim. So the CPU must be doing something!!

 

I got the LED's to light full power. I just decided to re-flash the code and programming and they seem to be working now.

I still am not getting an RPM signal and am unsure why...

I'm going bonkers looking at it for hrs on end. Anyone have any suggestions?

 

Aaron Cake:

I have the schematic that you posted.

There is no feed from the respective pins on the daughtercard.