DSM CAS highres with toyota coils on a Volvo 16v turbo

[honestjhon]

Hello!

I am currently trying to figure out what to do next to get this thing running.

It is a v3.0 board with MS2 extra. currently running the latest stable release firmware.
I have a DSM CAS with the yoshifab high-res trigger wheel. I did the modifications (that i was pretty sure were correct from what i was reading) so that i could run the Toyota corolla coils in COP, and for the CAS to work.

I have pictures of the board itself, and the .MSQ and pictures of the composite logger readings from when i spun the CAS with a drill on the intermediate shaft.

when i try and start the car, however, there is NO rpm reading in tunerstudio, and it just cranks without triggering the fuel pump (which does prime on key on)

one thing i did notice, and this probably indicates i messed up one or all of the modifications to the board, is that when the key is on, all the LEDS are solid on. even during cranking. they arent full bright, because when i go into output test mode, and fire the coils, the leds get brighter and flicker based on the settings i put in.

anyways, hopefully someone can chime in and point me in the right direction and help me get this thing started! i want to hear this motor run and drive it!


thanks!

[jsmcortina]

The composite logger shows no cam signal. That's why you are not getting RPM.

James

[honestjhon]

here are the pictures of the board itself



and what is the second red trigger happening on the bottom of the composite logger?

[jsmcortina]

Take a look at section 2.14 in the Megasquirt-2 Setting Up manual.

James

[honestjhon]

So the red is sync loss.

Can you see anything on the board that I did wrong?

[jsmcortina]

I can't figure out exactly how the "cam" input is connected, but somehow it isn't working. That's what you need to investigate.

James

[honestjhon]

I will have to check.

I can't find the guide I used to put together what I did....

[honestjhon]

http://msextra.com/doc/general/pix/v3input-opto.gif

is the circuit I put together

I'll have to double check my connections and the layout of the circuit.

[honestjhon]

Bypassing the above mentioned circuit. Instead going this.
How to mod a MegaSquirt-II PCB3.0 ECU-
Our version will have you use the VR input circuit for the CKP input and a basic logic level input for CMP. Jumper TachSelect to VRIN and TSEL to VROUT. Note that it will be easier to add the MAP sensor after adding these mods, as it gets in the way of the SPR3 and SPR4 holes.
Parts Needed for Input Mod: (1) 1k 1/4w Resistor and (2) 470 ohm 1/4w Resistors (Grab a mk-pullup with your order to get the resistors you need for next to nothing!)
"CMP Signal" -- Lay a 1k 1/4watt resistor across the bottom of the PCB with one end at JS10 and the other end at the SPR3 hole. Bend the resistor leads to raise the resistor just a bit off of the PCB and allow a lead on one end to drop through SPR3 and solder that end in place (while making sure the other end is in place near JS10 still, and with the resistor still raised a bit off the board so the leads don't short against anything). Bend the other end to JS10 and solder it in place. Now to get the 5v pullup use a 470 ohm 1/4w resistor and solder one end of it to the leg of the first resistor to SPR3 and the other leg of it to the 5v+ hole just above the proto area. (This is a long reach so you'll need to use a bit of wire to get across the board.) Once again raise this just enough off of the PCB to prevent it from shorting with any of the leads sticking out on the board. (Heatshrink tubing over the whole wire/resistor assembly works nicely)
The new "cap mod" turns this into a low pass filter that helps avoid misfires caused by a noisy CMP signal. Solder a length of wire to a 0.1 uF capacitor, and connect this capacitor-on-a-wire between JS10 and SG or a ground hole in the proto area.
"CKP Signal" -- We just need a 5v pullup. Install a 470 ohm 1/4w resistor between VRIN and the 5V source in the proto area.

[honestjhon]

so i removed the circuit that i had added for the second input.

I added what i posted above, and made the accompanying adjustments.

please take a look.

[honestjhon]

today, had a breakthrough after last night removing the junk that I had added, and just following the write-up that Nick had posted in the DSM CAS thread. so it is currently registering the RPM's and running the fuel pump.

attached is a picture of the data log I got from cranking it.

As far as the coils, I have them triggering off of the LEDs and have a fourth circuit built as per the other diagram i have attached.

I would like some input as to what I should be changing/checking.

some things to note:

I am still not getting the CAM signal in the composite logger. not sure whats going on there.

and all three leds are solid on when key on.


thanks!

I have the coils wired in for IGN, SPR2, SPR3, SPR4. wired to order 4,3,1,2.


thanks!

[honestjhon]

Just noticed the can did give a pulse. But its not a square wave.

[honestjhon]

Fixed the firing order.

No coil output from spark d (coil number 2)

Tested with a different working coil. No go.

Didn't test the injector outputs. Would like to figure out the spark d thing first.

[honestjhon]

so i cleaned up the flux and ran another cranking log.

still unable to get spark d to work in i/o test mode.

and did not hear injectors pulse.

i have the injectors wired to the inj1 and inj2 banks.
cylinder 1 and 4, 2 and 3 together.

[honestjhon]

put a multimeter on the plug for the injectors and set it to fire the banks. the multimeter is registering that it is doing something, but its only showing .03v ( i am pretty sure that it is registering that because the short burst of firing an injector)

but i cannot hear the injectors clicking.

they are 5.0 motorsports 1500cc injectors.

[Matt Cramer]

Do you have 0 or 5 volts on spark D with the key on and engine off?