Awm 2003 Audi Tt Ecu and Cluster

08-18-201507:09 PM

Final edited by S-lime; 09-08-2015 at 03:37 PM.

08-18-201507:11 PM

I take a 4b0906018CH From 2001 five-speed awm forsale.

08-18-201507:35 PM

Wow. Sounds similar you've been throwing some parts at this.

I would suggest picking ane symptom, and so tracing that back to a definite crusade. I'd choose spark, considering that'south less messy (and smelly) than fuel.

No spark? There are 4 wires that go to each gyre to make information technology fire. Figure out which wire is not giving the correct stuff. I'd judge yous are missing 12v supply to all 4 coil packs during cranking. Why is that? Side by side stride back is the fuse. Does the fuse have power during cranking? No? Side by side step back is the relay. Exercise nosotros take 12v+ at the relay? Do we have power and ground across the relay coil during cranking? No ground trigger from the ECU, eh? Do we have any codes? Is the ECU getting power and ground input at all necessary pins?

Just trace it back, symptom to source. There is no need to go far a guessing game. That gets expensive correct quick-like.

08-19-201512:01 AM

Quote Originally Posted past walky_talky20 View Post

Wow. Sounds like you've been throwing some parts at this.

I would propose picking one symptom, and and then tracing that back to a definite cause. I'd cull spark, considering that'south less messy (and smelly) than fuel.

No spark? In that location are 4 wires that become to each coil to brand it burn. Figure out which wire is not giving the right stuff. I'd guess you are missing 12v supply to all four ringlet packs during cranking. Why is that? Next step back is the fuse. Does the fuse have power during cranking? No? Next step dorsum is the relay. Do we have 12v+ at the relay? Exercise we take ability and ground across the relay scroll during cranking? No ground trigger from the ECU, eh? Do we accept any codes? Is the ECU getting power and ground input at all necessary pins?

Just trace it back, symptom to source. At that place is no need to make it a guessing game. That gets expensive right quick-like.

I would normally do this. I highly dubiousness the rpm gauge, fuel injectors, and spark are all un-related issues though. They all atomic number 82 back to one thing. The ECU. Is there any way diagnose if the ECU is faulty?

08-19-201512:11 AM

I would buy a tuned ecu from k0mpressed.

08-19-201501:40 AM

Quote Originally Posted past King_ View Post

I would purchase a tuned ecu from k0mpressed.

Possibly. Is replacing the ECU as simple as plugging in and that's it?

08-19-201508:17 AM

Quote Originally Posted past Southward-lime View Post

Perchance. Is replacing the ECU equally simple as plugging in and that's information technology?

On a North American B5? Yes, pretty much. In that location is no immobilizer so you only plug and go. Y'all should cheque the software coding to make sure it's ready correctly for manual/automatic, ABS/ESP and all that jazz.

Quote Originally Posted by Southward-lime View Post

I would usually do this. I highly dubiety the rpm judge, fuel injectors, and spark are all un-related bug though. They all lead back to one thing. The ECU. Is there any fashion diagnose if the ECU is faulty?

The ECU. Or the power source to the ECU. Or the basis to the ECU. Or the ability supply relay to the ECU. In that location are lots of things, actually. But if yous have 1, past all means throw an ECU at it, too. Might fix it. Diagnosis of the ECU is pretty much "make certain the ECU has everything it needs, and then if information technology still isn't doing it'due south job, it's faulty".

08-twenty-201512:39 AM

Quote Originally Posted by walky_talky20 View Post

On a North American B5? Yes, pretty much. In that location is no immobilizer so you merely plug and go. You should check the software coding to make sure information technology's gear up correctly for manual/automatic, ABS/ESP and all that jazz.

The ECU. Or the ability source to the ECU. Or the basis to the ECU. Or the power supply relay to the ECU. At that place are lots of things, really. But if you have one, by all means throw an ECU at information technology, too. Might set up it. Diagnosis of the ECU is pretty much "make certain the ECU has everything it needs, and and so if information technology still isn't doing it's job, it's faulty".

ECU is receiving 12V power to both sides. How do I check the footing to the ECU before throwing a new on in it?

08-20-201509:09 AM

First you become a diagram then you know what pins are supposed to get power, ground, etc.

If the ECU receives all grounds, abiding power, and ignition trigger power, it should provide a path to basis for the ECU Power Supply Relay sufficient to shut that relay.

And then, for case - if the ECU is doing everything it should - but the ECU Power Supply Relay is faulty and will not close, the car will not get-go in spite of a perfectly good ECU. That's one example.

If, notwithstanding, the ECU is getting everything it needs, but is declining to provide a path to ground to close the Power Supply Relay - that is one failure mode that I take seen of an Audi ECU.

08-20-2015x:26 AM

Are you able to communicate with the ECU via vagcom or a scanner?

08-20-201510:40 AM

I basically merely stuck the multi-meter into random pins and most of them had power. I found this but I am having difficulty understanding what verbal pins should have power and ground. I too checked the relay abreast the ECU for power, and it likewise had power.

08-xx-2015eleven:11 AM

Easy fashion is to plug in a calculator and make sure it tin communicate with the ECU, browse it for codes.

I've never seen my tach move while starting but possibly I don't pay close enough attention to it.

08-20-201508:51 PM

That's going to be difficult to follow because it'due south definitely a Nissan diagram. lol

This should help you out:

Check for skillful basis on pins 1 and 2.
Check for good 12v+ at pin iii (ability with fundamental ON)
Check for good 12v+ at pin 62 (power at all times)

Pin 21 should show approximately 12 volts, besides. That is a path to 12v+ through the curlicue of the ECU Power Supply Relay. The ecu applies a ground to pivot 21 in club to close the relay.
Pin 121 is the 12v+ output of said Power Supply Relay dorsum to the ECU.

08-21-201512:57 PM

Quote Originally Posted by walky_talky20 View Post

Cheque for skilful ground on pins one and 2.
Check for good 12v+ at pin 3 (power with key ON)
Check for expert 12v+ at pivot 62 (power at all times)

Pivot 21 should show approximately 12 volts, too. That is a path to 12v+ through the coil of the ECU Ability Supply Relay. The ecu applies a basis to pin 21 in order to close the relay.
Pin 121 is the 12v+ output of said Power Supply Relay back to the ECU.

Thank you so much! I checked all power and ground specified and all are working. I am going to order a new ECU now.

08-21-201501:04 PM

Also noticed the car says "Depress clutch to start" on the dash, even though it is an automated.. Is this normal?

08-21-201503:04 PM

Concluding edited by Wrath And Tears; 08-21-2015 at 03:22 PM.

08-21-201509:58 PM

A manual B5 will definitely start without clutch input. Otherwise bump starting the auto would never work...e'er. Nor would turning the central off and dorsum on while rolling in gear. But both of those things definitely first the engine without touching the clutch pedal. The clutch pedal message from the cluster simply means that the cluster is coded for manual instead of automatic. It doesn't necessarily mean anything more than that.

If he really has checked everything, then it sounds like he has a bad ECU.

Personally, I can't believe the OP has knowingly purchased a cleaved Audi *and is attempting to gear up it himself* without having even the gratuitous version of VCDS. It boggles the mind.

08-22-201512:25 AM

Well, I'll update you all in a couple weeks when the used ECU arrives. I hope your help and my diagnostics take led to the right problem! :)

09-08-201503:38 PM

Replaced the ecu and it runs, thank you lot guys so much

06-04-202006:36 PM

I'm in a similar state of affairs and stumbled upon the colored pin picture of the ECM in this thread which helped me. I was getting intermittent voltage on 21 & 121 so I sent the ECM back to APR since they originally tuned information technology and warranty their work. They repaired it and sent information technology dorsum but the car yet won't work and now I can't connect to the ECM with my OBD2 scanner. I rechecked all of the pins for power as shown in the picture higher up and they all cheque out...and 21 & 121 are no longer intermittent (or at least it seems that way with limited testing). I'm debating whether I should buy another ECM on EBay to verify that fixes the issue and then send both to APR to have the tune moved to the new ECM.

06-05-202012:03 PM

Quote Originally Posted by SilverHotz View Post

I'm in a similar state of affairs and stumbled upon the colored pivot pic of the ECM in this thread which helped me. I was getting intermittent voltage on 21 & 121 so I sent the ECM back to APR since they originally tuned it and warranty their work. They repaired information technology and sent it back but the car however won't work and now I can't connect to the ECM with my OBD2 scanner. I rechecked all of the pins for power as shown in the picture in a higher place and they all cheque out...and 21 & 121 are no longer intermittent (or at least information technology seems that way with limited testing). I'g debating whether I should buy some other ECM on EBay to verify that fixes the result and so send both to APR to have the tune moved to the new ECM.

I'd effort to borrow or purchase a stock ECU and install information technology to verify you don't have a wiring result. I believe APR unremarkably tests the ECU before sending it back to the customer.

06-05-202001:xix PM

Thank you for the advice. That's exactly what I did today. I called APR. They verified they bench test them but obviously don't really put them in a automobile. I plant one on EBay for $50 then I bought that and hopefully in another calendar week I'll get it and be able to verify.