No Crank Trigger / RPM - New Installation Configuration

[Tony C]

Firstly may i say thanks rob for sorting my login prob,

yes it was hall effect mate,
And jago was converting the ecu to vr while he was doing the p259 and adding the second trigger for a later date,
so any diagrams etc that shows what im looking for on the board will help as will then know if it has been set to VR,

the board is v3.3

thanks guys,

[rob@vems.co.uk]

This should do you:

http://www.vems.co.uk/VEMS/InputTrigger.html

Rob

[Tony C]

cheers for that rob,
i may leave this bit to an expert as im ok soldering but when it comes to small components on a board i may cock it up,
i noticed in the link the pic shows 6 jumper pins and my board has 12,
im trying to get hold of jago to take a look at the board have printed off the pics etc in the link,

[Tony C]

is my board set out different to the link pics?
and will the map sensor need removing, (or the pipe) to get to what needs looking at)?
while the ecu is in bits any one point me to a diagram of what it will look like if its set up for dual knock sensors?

[rob@vems.co.uk]

You've got a 3.3 board and the pics were of a 3.1 or 3.2 but the resistor and jumpers around the VR sensor chip are still the same.

I'll see if I have an old dead 3.3 board at home that's setup for Hall or VR and we can see what we can see.

Have a search on here for signalgen its a tool in the tools package that makes a .wav file that you can use to test the board by playing it from your soundcard into the VR sensor plug.

[Tony C]

Cheers mate,
if you do have a board to look at that would be cool.
i cant get to the car until the weekend now as the owner of the workshop is at work,
and i go back to work monday so its going to be a weekend thing again unless i get the car trailered home.,
Still waiting on Jago to get back to me regarding having a look at the board to see if he set it up correctly.

[Tony C]

just got back from picking the ecu up from Jago,
and he confirmed its set up for VR on primary and secondary trigger,
and its set up for dual knock as well,

off over the workshop in a min to test the sensor as rob said with the test meter, the correct way this time 

If there is no reading from the sensor upon testing is it dead? as was new from trigger wheels.
or is it to do with the distance from the trigger wheel?
if so what should the gap be?
cheers

[Tony C]

put the test meter on the sensor,
hope this is the correct setting.

when cranking over the display reads 02.4

still no reading on the rpm gauge in MT or any sign of life at the plugs,

[rob@vems.co.uk]

two clicks anti-clockwise should do you thats 200mV AC

[Tony C]

ah ta lol
will try again tomorrow then, but i think its working

[Tony C]

First things first, if you put a DVM on AC and put the probes across the VR and Ground pins (EC36-pin26 and EC36-pin27)
When cranking you should see 100 to 200mV

ah that would be my fault cos you said AC mate lol

Just spoke to the guys where the cars sat and they said no probs will test it again in the morning,
but they said they dont think the sensor is the prob cos an out put was detectedfrom the sensor with the DVM.
If i can't get this sorted by sunday i may have to get someone to price me up checking the board out if poss.
or double checking the msq as this is whats holding us up now and the car needs to be moved asap (been in the workshop since may 09)

[Tony C]

armed with the correct DVM settings
we set to work testing the sensor,
at first all we got was OL on the test meter which indicated Over Limit,
so we decided to space the sensor off the trigger wheel and started to get a reading on the DVM

with it spaced this far,


We got a reading of:


i gather that readin is ok and means the sensor is ok.

[Sprockets]

I would try and close that gap up a bit.  It's working but not quite strong enough.  I normally use a feeler gauge to setup a CAS, not a ruler :p That should be in the region of 500mV at least really.

-Gavin

[Tony C]

oh ok Rob told me between 100 and 200 mv though lol.

is the trigger wheel to close to the pulley?
as been told on my v8 forum that it is,

[Sprockets]

Nope, that should be fine.  Seen similar work, like slots machined into the balancer. Only true way to tell would be to scope it

Rob knows the VEMs well, but if you can get a stronger signal by just a quick tweak, worth a shot   Most OEMs have a fairly high output at cranking and a narrow clearance of about 0.5-1mm.  If it has a higher output, more likely to trigger (and also helps to give a signal when the starter is less than healthy and reluctant to turn the engine over nice and fast!)

Not saying this is your problem, just providing an educated guess!  Also, not sure if this has been said but make sure the polarity is right for the sensor.  This caused me no end of grief in the past, had to do a trigger log and use that funky perl script to find that out. Or you could just try swapping the wires round lol.

Good luck!

-Gavin