USB to Serial

GRUSKS · Post by **GRUSKS** » Tue Jul 03, 2007 6:52 pm

Guys im using one of these adaptors but un sure what i have to load off the cd rom, no instructions with it. Any one used one before, im using a laptop with xp pro.

Post by **brentp** » Tue Jul 03, 2007 9:52 pm

That looks like the Prolific USB->Serial adapter. It should work fine with that.

when you plug it in to your computer for the first time simply have windows load the drivers from the disk. Should be pretty easy. To find out what com port was assigned, look under 'device manager'.

GRUSKS · Post by **GRUSKS** » Tue Jul 03, 2007 10:06 pm

Thats what i was hoping it would do, but i didn't, so i put the disk in and it has no auto run, and loads of set-up files and no read me.

Another try tomorrow

Cheers brent

Spence

GRUSKS · Post by **GRUSKS** » Fri Jul 06, 2007 10:32 pm

Thrown away the eBay lead and bought a proper one from a shop with instructions and it works fine on my laptop.

When revving the engine ( in the garage as not road legal yet) on the MJ tuning page 'Ignition Configuration' the red square moves about as i revv the engine but only moves side ways along the top row of boxes eg not seeing any load changes is this because im stationary with the car or is something wrong with my TPS.???

Spence

MartinM · Post by **MartinM** » Sat Jul 07, 2007 7:53 am

What does the big TPS dial gauge show?

If that's showing movement but you're stuck in the top row of the map then that is weird!

GRUSKS · Post by **GRUSKS** » Sat Jul 07, 2007 12:20 pm

It doesn't move as i thougt it should. It jumps from 0 to 80% with the slightest of pedal movement and then another jump to 100% at full and then sometimes doen't move at all. It looks like a faulty TPS. I assume it ment to flow round from 0 to 100% as i move the pedal

GRUSKS · Post by **GRUSKS** » Sat Jul 07, 2007 1:27 pm

Im running Yamaha Mikuni R1 Bike Carbs, they have a TPS on the side, can someone confim the connections as to whats 5v & earth & TPS trigger to MJ as per picture

MartinM · Post by **MartinM** » Sat Jul 07, 2007 1:46 pm

Almost certainly the centre connector is the wiper - MJLJ pin 9

Impossible to tell which one is supply (MJLJ pin 6) and which is earth (MJLJ pin 8 or local earth) - one way round will show low% at closed throttle and the other will show high% at closed (you want low% at closed!)

When it's sorted you can do the throttle calibration exercise to make it 0% to 100% on the Configurator and in the MJLJ

If you keep the wiper roughly in the middle you'll come to no harm whichever way round you do the connections

Also use a voltmeter on the centre wiper - should go smoothly low volts to high volts with increasing throttle.

GRUSKS · Post by **GRUSKS** » Sun Jul 08, 2007 11:38 am

I had a fiddle with a multi meter an laptop, looks like its not broken but fitted wrong, not lined up on the spindle somehow, and wired wrong by me. All sort, it now moves from 0 to 100% as i press the throttle.

Turned out it needs Earth at the top Signal in the middle and 5v at the bottom as per the picture.

Cheers guys.