Number of bins limited by correcting the TPS axis ?

Patriq · Post by **Patriq** » Tue Jul 29, 2008 10:44 am

After correcting the TPS axis, the bins usable seems to have been narrowed down, instead of beeing spread out over the new scale.

I'm using the latest downloadable configurator software for V3 board.

Also, in the table for load it doesn't says 0-100 as I would expect. But rather 0-240. This seems more like a MAP value. But I have choosen TPS for configuration. And, as mentioned - I have calibrated the TPS axis. And the dial on the screen corresponds to the movement of the throttle.

But, back to the original problem - when I reach the value 50 for load, that seems to be the limit of the table for that axis. That is - the table has lots of values for 50-240. But full throttle corresponds to 50 in the table.

That's in the table view.

Also, when I try to step with the arrows in 3d view from 1900, to 2000 rpm to edit - it stops and doesn't let me. So I can only edit 1000-1900 rmp values in 3D view it seems.

I've just started the car with MJLJ. It ran fine and steady at 10dgs BTDC with only EDIS. And MJLJ seems to be working just fine. It's just the values for the ignition curve that doesn't suit the engine at all and needs to be corrected.

Post by **brentp** » Wed Jul 30, 2008 5:42 am

To dial-in your load axis, you will need to perform these two tasks:

1. Calibrate your TPS (you may have done this already)
2. Adjust the load axis bins to match your TPS range- typically this is 0-100% in 10% increments, but you can separate the bins differently to suit your preferences.

See the Operation Guide (see appropriate guide for V3 or V4 software in the how-to section) for more information on how to perform load axis calibration and how to adjust your load / RPM bins.

Hope this helps,

Patriq · Post by **Patriq** » Wed Jul 30, 2008 10:04 am

brentp wrote:To dial-in your load axis, you will need to perform these two tasks:

1. Calibrate your TPS (you may have done this already)
2. Adjust the load axis bins to match your TPS range- typically this is 0-100% in 10% increments, but you can separate the bins differently to suit your preferences.

Ok, I hadn't realized I needed to do this as well. I thought the bins in the load axis automatically adjusted. I'll have to do that manually then. I'll have a look at it and try.

See the Operation Guide (see appropriate guide for V3 or V4 software in the how-to section) for more information on how to perform load axis calibration and how to adjust your load / RPM bins.

Hope this helps,

Patriq · Post by **Patriq** » Wed Jul 30, 2008 8:01 pm

Ok, so if I understood this right:

I first calibrate the TPS. Then I look for when the scaled value is 100. The ADC value for when scaled value is 100 would be the value I correct the load axis with to be the maximum value ?

I have an ADC value of 145 when scaled value is 100. So at the bottom row in the load axis bin i put 145 ? And I have increments of 14.5 in each load axis bin until I reach 145 ?

Secondly - in 3D view, I still can't jump further in the rpm axis using the alt key + arrows. For each time I press alt+arrow I jump 1/10 of a bin value until I get to "next" bin value. Then it stops. Is it supposed to be so ?

Patriq · Post by **Patriq** » Tue Aug 05, 2008 9:08 am

*bump*

Need to know if my TPS readings will make MJLJ look at the right place in the table. Have I understood correctly how you set up and calibrate table/TPS ?

And aren't you supposed to be able to jump through the whole table in 3D view?

Post by **brentp** » Tue Aug 05, 2008 7:21 pm

Hi Patriq,

Some clarification- follow this procedure to get your TPS calibrated and the load axis matching your TPS calibration. If you've done some of this, please bear with us...

Step 1. Adjust the configuration software to display load in 0-100% TPS, rather than MAP:
http://www.autosportlabs.net/MJLJ_V3_Op ... MAP_or_TPS

Step 2. Calibrate your Throttle Position Sensor, using these instructions. The calibration procedure allows the controller to translate the raw ADC value to actual throttle % open.
http://www.autosportlabs.net/MJLJ_V3_Op ... alibration

After calibrating your TPS you should observe the load gauge scale range from 0 to 100% according to your throttle input.

Step 3: After you've verified the above, adjust your 10 load bins to reflect 0 - 100% load. Most people typically start with each cell 10% apart.

How to edit your load bins:
http://www.autosportlabs.net/MJLJ_V3_Op ... F_RPM_Bins

After editing your map, be sure to write the new ignition configuration to your controller and then perform a Flash.

Hope this helps,

Patriq · Post by **Patriq** » Tue Aug 05, 2008 7:39 pm

brentp wrote:Hi Patriq,

Some clarification- follow this procedure to get your TPS calibrated and the load axis matching your TPS calibration. If you've done some of this, please bear with us...

Step 1. Adjust the configuration software to display load in 0-100% TPS, rather than MAP:
http://www.autosportlabs.net/MJLJ_V3_Op ... MAP_or_TPS

Step 2. Calibrate your Throttle Position Sensor, using these instructions. The calibration procedure allows the controller to translate the raw ADC value to actual throttle % open.
http://www.autosportlabs.net/MJLJ_V3_Op ... alibration

After calibrating your TPS you should observe the load gauge scale range from 0 to 100% according to your throttle input.

Load gauge scale, are you then refering to the scale in the the axis calibration window?

What is ADC value ?

And is it as I described in a post above, that where I have a scaled value '100' - I look at the same line for the ADC value ? And that that ADC value is what I edit accordingly in step 3 below to be my 100% load value in the load bin ?

Step 3: After you've verified the above, adjust your 10 load bins to reflect 0 - 100% load. Most people typically start with each cell 10% apart.

How to edit your load bins:
http://www.autosportlabs.net/MJLJ_V3_Op ... F_RPM_Bins

So the ADC value is what goes in the TPS load bins ?[/quote]

After editing your map, be sure to write the new ignition configuration to your controller and then perform a Flash.

Hope this helps,[/quote]

Post by **brentp** » Tue Aug 05, 2008 8:52 pm

Patriq wrote:
Load gauge scale, are you then refering to the scale in the the axis calibration window?

No- I meant the round load gauge dial after you finished the calibration process. It should read 0% with no throttle and 100% with full throttle.

Patriq wrote:
What is ADC value ?

Analog to Digital Converter value. this is the 'raw' voltage value read from your TPS. The calibration process translates this raw value to a more useful 0-100% throttle opening indicator.

Patriq wrote: And is it as I described in a post above, that where I have a scaled value '100' - I look at the same line for the ADC value ? And that that ADC value is what I edit accordingly in step 3 below to be my 100% load value in the load bin ?

It's not quite that complicated. After calibration is done, you would not need to worry about actual 'ADC' values any more- only 0-100% Load, based on your TPS. You edit your load axis in your ignition map to match this (Step 3)

Try the the steps as outlined and let us know how it works out.

Regards,

Patriq · Post by **Patriq** » Fri Oct 16, 2009 6:19 pm

Well, now I'm trying the V3 unit I fried - after changing all components.

Everything seems to work fine. After a calibration of the TPS the gauge reads from 0-100% with the throttle when I use the accelerator.

Engine isn't running. I've had a complete rebuild, and I still need to sort some small details before turning the key.
BUT, when in 'Tuning' or 'Configuration', when I press the pedal and the gauge shows 100% the dot in the tuning window or the highlighted bin in the configuration window only advance from the the top left to the second row left bin.
I would have expected to see it move all the way down to the last row ?
Is this because the engine isn't running ?

Post by **brentp** » Fri Oct 16, 2009 6:22 pm

No worries. When the MJLJ sees a signal on the PIP line (RPM signal) the bins will update. It's an artifact of the firmware's behaviour.

Patriq · Post by **Patriq** » Fri Oct 16, 2009 6:33 pm

I could mention, that after the calibration - the load axic calibration bins has a scaled value of 0 at 172 and 100 and 186. So i figure that the TPS only really operates between 3.37V and 3.65V ?

Again - what should the load bins value then be to function properly?
Should the load bins have values distributed from 172 to 186 in bin 1- 10 ? I tried this - but the highlighted bin in the advance table still only went from top row to second row when throttle was at 100%. The rpm bin was at all times the leftmost one since the engine isn't running.

Patriq · Post by **Patriq** » Fri Oct 16, 2009 6:35 pm

Sorry, I hadn't noticed that you had replied that fast....

Ok, so all seems good then. Will turn the key as soon as the last header is bolted properly to the exhaust port.