Any ME221 gurus on here?

[MaddRT]

Hi all,

*Won't respond to responses that aren't relevant to my situation*

Done the mech install for my ITBs on my ph1 & trying to get it started on the PnP ME221 and I'm hitting a brick wall

As the car is a ph1 then I have done all the pin swaps necessary

The fuel pump is priming but the TPS signal doesn't change with pressing the throttle & the IAT is reading 0

I'd like to be able to sort these so I can drive it for final mapping

Any suggestions?

 

[incy-spider]

Hi mate, I’m sure you have but Alex was very helpful when I was looking into the ECU for mine on FB messenger

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[MaddRT]

Hi mate, I’m sure you have but Alex was very helpful when I was looking into the ECU for mine on FB messenger

View attachment 1489832


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Alex said he couldn't do anything until the signal from the sensors were coming through sadly

 

[Touring_Rob]

Do they not have a debugging screen to help with this? Do you have any noise on either TPS or IAT when logging? Is coolant reading anything? Also screw using DBW with this.

 

[Touring_Rob]

Also, do you have a multimeter? 0 is actually quite an odd reading for the IAT. If you remove it and warm it up does the reading change at all?

 

[MaddRT]

Do they not have a debugging screen to help with this? Do you have any noise on either TPS or IAT when logging? Is coolant reading anything? Also screw using DBW with this.

ME couldn’t help at all, they said they’d need to collect the car to diagnose the issue

No noise that I’ve noticed

Coolant is reading a sane figure

Car is a Ph1 so mechanical throttle not DBW

 

[Touring_Rob]

What about multimeter? Do you have anyway of checking 5V, GND and output sig from TB and then at ecu end?

 

[MaddRT]

What about multimeter? Do you have anyway of checking 5V, GND and output sig from TB and then at ecu end?

Not in my possession unfortunately, been asking a friend to bring one for a few weeks but he keeps forgetting

 

[Touring_Rob]

Ahh, fair enough. Can't help much either without some testing. You need to buy a multimeter (even a cheap amazon one) and do some simple tests. I am betting a pin or two are in the wrong place or an earth is missing.

Normally the TPS, CLT and IAT will have a separate signal GND back to ecu (separate from the power gnd) good chance this isn't there if all three aren't working. Don't count on the CLT working without heating it up to check. Normally they have a bias network which places the reading at a bit less than running temp so when the connector is disconnected or sensor is open cct the engine will still run after a fashion (which is why a 0deg on IAT is a surprise).

Also make sure IAT cal is not at fault (by heating the IAT and looking at readings). If the temp changes then its the cal which needs sorting.

Some ECU firmware does not give any readings when the TPS is wired backwards. Check this by holding full throttle and zeroing TPS cal then release throttle to see if reading changes.

If none of that works then its likely a wiring issue or ECU issue.

Good luck.

 

[MaddRT]

so TPS was a sensor issue, but need to try some more pin swaps for the IAT so watch this space

 

[dann2707]

Not in my possession unfortunately, been asking a friend to bring one for a few weeks but he keeps forgetting

Just buy one lol paid £12 for one on amazon 7 years ago and given it hell, still absolutely spot on to this day

 

[MaddRT]

Just buy one lol paid £12 for one on amazon 7 years ago and given it hell, still absolutely spot on to this day

I’d probs blow myself up using one

 

[Touring_Rob]

I’d probs blow myself up using one

Dude, if you can swap pins around on an ecu connector you can use a multimeter.

Your more likely to damage your ecu/car by doing stuff like this without one than you are to ever hurt your self.

 

[Martin_172]

I’d probs blow myself up using one

learning a new skill is fun, buy a multimeter and watch some YouTube videos

 

[MaddRT]

Having a bit of a head scratcher with the IAT

There’s a peach & purple wire coming out of the sensor & there’s only one purple wire in the whole ECU but currently it’s in the Vehicle Speed Signal pin (Ph1)/Brake light pin (ME221)

So I’m going to put this purple in one of the IAT pins with the peach but that leaves a white wire doing nothing (that I thought was IAT initially)

Is there any way I can find out what this white wire is & where it’s supposed to go?

 

[incy-spider]

Give me your WhatsApp and I’ll send you a wiring diagram and ECU pin outs if it helps?

Scratch that, I only have the 182 diagram.. but I do have the Gen90 pin out chart if you wanted to cross reference any pins?

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[MaddRT]

Give me your WhatsApp and I’ll send you a wiring diagram and ECU pin outs if it helps?

Scratch that, I only have the 182 diagram.. but I do have the Gen90 pin out chart if you wanted to cross reference any pins?

Sent from my iPhone using Tapatalk

I’ve got these that I’m using

 

[MaddRT]

so I’ve swapped a few pins and put a different TPS in and we’re getting a sane IAT reading. But the TPS is going between 95 (off) to 97 (on). Which is a step in the right direction but it’s not right - any ideas?