[Mk2] [Turbo] HELP!! Car wont run!

[markstevieandmads]

So, like i suspected, blown ECU.

Could I just take the ecu to maplins and point out the 2 I need?

Maplin? Advice?

You're better off asking the cute looking teenie on the checkout at PetWorld.

Ha ha lol

No cuties at our pet world!
Found someone to repair this for me so hopefully the turn around time won't be long.

Also got the opportunity to buy the bits for a rev 3 conversion local for £200 so wonder is this worth doing for this price or is it best to leave to a specialist?

[vtecpower]

This must be a common fault on rev2 turbo ecus

Had it happen to TWO of mine

And seen it number of times on here

[markstevieandmads]

I've sent mine off to be repaired And I've also bought a spare working one as can see these rev 2 ones getting rare in good nick.

I'd advise having the caps changed before they go bad as the goo in the caps leak on to the tracks and corrode them causing problems.

[jon]

Rev 3 ECUs also suffer from blown capacitors. I've repaired 2, one N/A and one Turbo. I've also repaired a 4A-GE 20v ECU.

I used Panasonic EB series caps from Farnell. Below are the part numbers for the various caps.

10uF 50v EEUEB1J100 2079131
15uF 35v EEAGA1V150 2079062
33uF 35v EEUEB1V330 2079105
47uF 63v EEUEB1J470 2079115
100uF 10v EEUEB1A101 2079167
220uF 10v EEUEB1A221 2079165

[markstevieandmads]

Little.update.

Bought new holder and bulb for cel direct from Toyota. Fitted this and the secondhand ecu (same numbers) which I was told was working.

Cel still not lighting up and still not starting.
My fixed ecu is waiting at the post office so collecting tommorow morning but surerly i haven't got another dud ecu?

[markstevieandmads]

Little.update.

Bought new holder and bulb for cel direct from Toyota. Fitted this and the secondhand ecu (same numbers) which I was told was working.

Cel still not lighting up and still not starting.
My fixed ecu is waiting at the post office so collecting tommorow morning but surerly i haven't got another dud ecu?

[markstevieandmads]

Been trying to find the ecu earth and after a search it said under inlet manifold


I think I've found it with a few wires underneath the inlet manifold near the cam belt side.

They look solid enough though covered in oil. Its hard to access but will attempt to loosen and clean them.

I've put my meter on the ecu casing and to a good earth but not getting any connection. Is that right as I'd thought a metal ecu case would be earthed?

[Peter Gidden]

Let's go over a few points because you're getting further and further from the problem, and this really isn't a tricky issue to sort out.

Have you checked B+ and IGN+ at ECU?

Have you checked earths at ECU?

Have you shorted 22pin5 to earth and lit up CEL?

[markstevieandmads]

Let's go over a few points because you're getting further and further from the problem, and this really isn't a tricky issue to sort out.

Have you checked B+ and IGN+ at ECU?

Have you checked earths at ECU?

Have you shorted 22pin5 to earth and lit up CEL?

OK. I've shorted the w pin to an earth (not the ecu earth but an earth from the boot) and the cel lit.

I did check for voltage which I did have but I can't remember what pins I checked. Can you list what pins I should have with permanent 12v and ignition 12v.

I think I tested voltage using the boot earth And not the earth pins from ecu so can you let me know what pins should be earth please?

I can then check these all tommorow.

Im also going to check continuity of earths to ecu too. The connection on bottom of inlet seems very hard to get to. Impossible from the top but think I can reach with an extension bar from the bottom. I think it had 2 browns on it and it was the cam belt side of the engine.

[Peter Gidden]

Let's go over a few points because you're getting further and further from the problem, and this really isn't a tricky issue to sort out.

Have you checked B+ and IGN+ at ECU?

Have you checked earths at ECU?

Have you shorted 22pin5 to earth and lit up CEL?

OK. I've shorted the w pin to an earth (not the ecu earth but an earth from the boot) and the cel lit.

I did check for voltage which I did have but I can't remember what pins I checked. Can you list what pins I should have with permanent 12v and ignition 12v.

I think I tested voltage using the boot earth And not the earth pins from ecu so can you let me know what pins should be earth please?

I can then check these all tommorow.

Im also going to check continuity of earths to ecu too. The connection on bottom of inlet seems very hard to get to. Impossible from the top but think I can reach with an extension bar from the bottom. I think it had 2 browns on it and it was the cam belt side of the engine.

OK, so we know the wiring to CEL is good and the bulb is good.

So, that leaves:

Bad B+
Bad IGN+
Bad earth
Bad ECU
Bad AFM

I'll post up pin details later.

[markstevieandmads]

Let's go over a few points because you're getting further and further from the problem, and this really isn't a tricky issue to sort out.

Have you checked B+ and IGN+ at ECU?

Have you checked earths at ECU?

Have you shorted 22pin5 to earth and lit up CEL?

OK. I've shorted the w pin to an earth (not the ecu earth but an earth from the boot) and the cel lit.

I did check for voltage which I did have but I can't remember what pins I checked. Can you list what pins I should have with permanent 12v and ignition 12v.

I think I tested voltage using the boot earth And not the earth pins from ecu so can you let me know what pins should be earth please?

I can then check these all tommorow.

Im also going to check continuity of earths to ecu too. The connection on bottom of inlet seems very hard to get to. Impossible from the top but think I can reach with an extension bar from the bottom. I think it had 2 browns on it and it was the cam belt side of the engine.

OK, so we know the wiring to CEL is good and the bulb is good.

So, that leaves:

Bad B+
Bad IGN+
Bad earth
Bad ECU
Bad AFM

I'll post up pin details later.

Thanks. Much appreciated. I'm hoping we can knock.off bad ecu off that list too as I will have a repaired one and a sold.as good one too.

[Peter Gidden]

On 22 pin plug:
Pin1 - White/Red - B+
Pin12 - Black/Yellow - IGN
Pin13 - Black/Yellow - IGN

On 26 pin plug:
Pin13 - Brown - Earth
Pin26 - Brown - Earth

Check for correct readings at ECU plug pins using a voltmeter. When checking live pins use the ECU earth pins instead of chassis.

If all is good, and the ECU is guaranteed good, then suspect AFM.

[markstevieandmads]

On 22 pin plug:
Pin1 - White/Red - B+
Pin12 - Black/Yellow - IGN
Pin13 - Black/Yellow - IGN

On 26 pin plug:
Pin13 - Brown - Earth
Pin26 - Brown - Earth

Check for correct readings at ECU plug pins using a voltmeter. When checking live pins use the ECU earth pins instead of chassis.

If all is good, and the ECU is guaranteed good, then suspect AFM.

OK checked the above and I have voltages and earths all in the right place.

I have 2 ecus and one has been repaired and one is a secondhand one that was sold working on its previous car.

I'm still not getting a cel light unless I short the w pin and earth and then it lights.

Car still not starting.

[markstevieandmads]

I'm assuming if I leave the cel light pin shorted to earth and then shorted the diagnostic pin then I won't get a diagnostic?

Also I know Pete has said bad AFM then but I'm not getting a spark on the king lead either and there is still a problem with the ecu side of things if I get a cel if I short the w pin to earth?

I've checked all 3 brown wires on the 26 pin and they all go to earth. I've checked the 2 yellow and black wires on ignition and they are OK too. And I've checked the batt red/white wire on 22 pin plug and that's 12v + OK there too.

[Peter Gidden]

I've checked all 3 brown wires on the 26 pin and they all go to earth. I've checked the 2 yellow and black wires on ignition and they are OK too. And I've checked the batt red/white wire on 22 pin plug and that's 12v + OK there too.

Good. So you now know:

CEL bulb works
Wiring to CEL is good
Live to ECU is good
IGNs to ECU are good
Earths to ECU are good
ECU is good

See my post above for next test.

[markstevieandmads]

So your suspecting AFM?

Would this stop a spark? I've got no spark from the king lead?

Also would this also cause the problem with the cel? Its still not lighting unless I short the w pin(green/white) to earth.

[Peter Gidden]

So your suspecting AFM?

Would this stop a spark? I've got no spark from the king lead?

Also would this also cause the problem with the cel? Its still not lighting unless I short the w pin(green/white) to earth.

Faulty AFM will cause the ECU to appear dead.

I had one in the workshop this week.

[markstevieandmads]

How much would I be looking at for one?

[Peter Gidden]

How much would I be looking at for one?

See if anyone on this forum lives near you. You could borrow one.

[markstevieandmads]

Just managed to buy a working AFM, dizzy cap and rotor arm for £20.