MS2Extra + Zeal + 3SGTE = no trigger signal

[BNZ]

Hi
My setup is :
Stock 3S-GTE Celica ST165 engine
ECU : Megasquirt 2 Extra 2.1.0 tested on jimstim,works ok on toothed wheel single pickup.
Added Zeal Board for the 2nd VR pickup so i can run the stock Celica engine (Nippon-Denso cam VR sensors NE,G1 & G-).
Setup is
Trigger wheel arrangement: Dual Wheel
Trigger Wheel Teeth: 24
Missing Teeth: None
Tooth #1 Angle: 20
Wheel Speed: Cam wheel
Second trigger active on: Rising Edge
and every rotation of: Cam

As i was unable to test it on the jimstim,tried on the car with no luck...not even a glimpse of signal in the Tooth Logger or Trigger Logger,although i've made sure the wiring is ok and the signal reaches the MS as per the wiring diagram i've drawn in the attachment.

So I'm kinda' stuck not getting any signal so i can move on !

How can i test the zeal board to make sure it works ok ?

[muythaibxr]

Are both VR pots fully CCW?

Where is Ne+ connected?

G-?

You should also use G2 not G1 but that won't cause the problem.

Ken

[BNZ]

10x for the reply Ken
I've set the pots when tested on jimstim with single pickup ! Do i need to set them again ? Anyhow,i will do that again but can they be the reason not getting any tooth count at all ?

NE is primary pickup connected in the usual MS2 VR pin
G1 is the secondary connected to the Zeal Board as stated in the Zeal's short manual/help page on DIY site
G- is the ground (other G pin on the zeal board)

Basically I've followed all the instructions here : http://www.diyautotune.com/tech_article ... sembly.htm

[muythaibxr]

I do not know if this is the problem, but on the shared ground VR systems, I run G- to one of the mainboard ground pins.

I also set the pots on the mainboard fully counterclockwise.

I would switch to G2 as well if you're using COP ignition.

Ken

[BNZ]

I understand.
I will drive the stock igniter for now,so running a Single Coil setup !

I will do the pots job again.
So you suggest i should run the withe (G-) wire in my pictures above to the MS PCB's ground,let's say on the proto area or better to ground it to the "sensors ground" pin 19 directly ?

[racingmini_mtl]

I'm not familiar with your setup but the JimStim will not generate a 2nd trigger signal that will work with the LM1815. For this to work, you need to put a small cap in series with the signal (a 0.1uF ceramic cap will be fine). Also, the way you set the VR circuit trim pots when using the JimStim will likely not be the same as what you need on the car so always re-check that.

Jean

[muythaibxr]

I understand.
I will drive the stock igniter for now,so running a Single Coil setup !

I will do the pots job again.

So you suggest i should run the withe (G-) wire in my pictures above to the MS PCB's ground,let's say on the proto area or better to ground it to the "sensors ground" pin 19 directly ?

I would run it to a non sensor ground... That is what I did and it works fine.

Ken

[jsmcortina]

10x for the reply Ken
I've set the pots when tested on jimstim with single pickup ! Do i need to set them again ? Anyhow,i will do that again but can they be the reason not getting any tooth count at all ?

Yes and yes.

The stim puts out a simulated pattern, but the voltage of the waveform is not the same as a real sensor.

James

[BNZ]

In a moment of despair i've decided to try the VR1 input on the Zeal ignoring Megasquirt's VRIN,and what do you know,worked form the first try on the jimstim (with the 0,1 capacitor in second trigger)

Now my question is...what's the downside in using Zeal's VR1 istead of VRIN (V3 Board) ? At least the pots'job is gone !

[racingmini_mtl]

There is no downside. If it works use it this way.

Jean

[coyoteboy]

I couldn't ever get a decent trigger setup from the 3sgte dizzy in stock form (MS1,v2.2 with add-ons) so in the end I hacked the dizzy and dropped in a hall.

However now I'm having problems with that

[muythaibxr]

The problem probably wasn't the sensor then. It is probably the grounds or power going to the MS.

Ken

[coyoteboy]

I went through that troubleshooting step back then, grounds were/are spotless (scoped at various points in various conditions) to the ECU, cables shielded, the works. Now I'm not so sure as the car has lain unused for 3 years and is rotting around me!

[BNZ]

Well in my case i'm a step forward,using Zeal for both triggers i get cranking RPM !
Now just to make sure, if i want to drive the stock Toyota igniter i have to do this mood also for my MS2E V3,right (adding a 1K Resistor bypassing R26) ?


http://www.msextra.com/doc/ms1extra/MS_ ... l.htm#vast

As for Dwell settings i use them :
And Spark output NORMAL (not inverted)

[BNZ]

Got some problems,it seems i have some RPM signal while cranking but engine does not start...I may not have spark,but meanwhile can someone look at my trigger/composite/tooth logs as i dont understand them quite wheel,but it seems something is not alright.

[BNZ]

and here's the ttrigger and a base msq i'm using

[BNZ]

Got it started,the circuit is as above stated in the manual and posted by me.

[Michael20]

Is it running? Are all 3S-GTE the same crank wheel's? Special the 3S-GTE Gen3 245HP