urs4 no start issue ecu problem? - Page 2

UrS4boy · 02-28-2012, 03:02 PM

New photos to hopefully help you track down the lack of power to the ECU.

Here is the UrS4 Above-ECU-fuse panel removed to better show the wires:

Wiring for the panel is bundled together (mostly) and heads towards the centre tunner and then to ??? White/blk ECU power has to join the T55 bundle somewhere close.

Here is the panel with the UrS4 S26 fuse holder removed to show the back of the fuse holder wiring.

illgetyou22 · 03-03-2012, 03:05 PM

I check is i was getting 12v to the red fuse holder and i am so next i check for continuity on the white and black wire to the connector and nothing. Soo far i have pulled out the black ecm holder to see where the wire is running but I ran out of daylight so hopefully i can find the break tomorrow.

illgetyou22 · 03-03-2012, 03:08 PM

Sorry for my spelling its been a long day.

UrS4boy · 03-03-2012, 03:36 PM

Sounds like you are on the track towards the solution.

On a related note, they do make portable rechargeable LED work lights.

illgetyou22 · 03-20-2012, 03:11 PM

Ok so I separated the harness and looked for a break in the wire and nothing so i took apart the ecu connector and push back the plastic and bam the wire wast even connected to the pin. So this weekend I'll be repining and going from there.

UrS4boy · 03-20-2012, 10:22 PM

Quote:

Originally Posted by illgetyou22

Ok so I separated the harness and looked for a break in the wire and nothing so i took apart the ecu connector and push back the plastic and bam the wire wast even connected to the pin. So this weekend I'll be repining and going from there.

That is good news. It is always good to find out what the problem is/was. Once you have the problem, you can figure out the solution, i.e. connect the wire to the pin, presumably via solder (be careful). Make sure the connection won't short against another pin.

In case you need it, here is an updated AAN Motronic ECU Pin-out to go with this updated Motronic diagram (done as a result of this thread BTW):

illgetyou22 · 03-25-2012, 03:25 PM

Repined the ecu and the car fired right up check engine light is on for something but at least its running.

UrS4boy · 03-25-2012, 04:12 PM

Quote:

Originally Posted by illgetyou22

Repined the ecu and the car fired right up check engine light is on for something but at least its running.

Yay. Good news. The CEL might be nothing. BUT...you better check it.

Blink code procedure and codes at SJM Autotechnik:

http://www.sjmautotechnik.com/troubl...f20v.html#fcs4

http://www.sjmautotechnik.com/troubl...g/20vcodes.htm

scarman · 03-26-2012, 07:42 AM

Or, use that scan tool you have.

illgetyou22 · 04-15-2012, 01:13 PM

Hey im back just took the car for a ride and looks like it needs more love feels like it has no power and misfiring below is the codes from the ecu

Im also debating selling the car i just dont have time i thought i would have to put into the car and my b6 and b5 s4 are screaming for attention im on the fence.

03-03-2012, 03:36 PM	#14
UrS4boy AudiWorld Super User Garage is empty, add now Join Date: Feb 2001 Posts: 18,183	Sounds like you are on the track towards the solution. On a related note, they do make portable rechargeable LED work lights. __________________ Naturally, IMHHEO(tm), Dave F. aka the Librarian Car and Mods: 93 S4, 1.8t coil pack conversion (First in world using integral POS coil packs (??)), CF (OE), S6 steering wheel, RS2'd, Samcos, MRC, TDS-1, Apikol FMIC, Eibach/Bilstein, BIRA Sys 1, relayed FP Click here to link to the UrS FAQ Thread Start Uncle Dave says "You want my 'high horse, elitist' opinion ?(IMHHEO(tm))Then just post something stupid." Unofficial Chief Cat-herder Vancouver UrS-car club

03-26-2012, 07:42 AM	#19
scarman AudiWorld Senior Member Garage is empty, add now Join Date: Sep 2009 Location: Knoxville, TN Posts: 611	Or, use that scan tool you have. __________________ Tom '95 S6 '95.5 S6 avant

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03-03-2012, 03:05 PM	#12
illgetyou22 Audiworld Junior Member Garage is empty, add now Join Date: Sep 2011 Posts: 16	I check is i was getting 12v to the red fuse holder and i am so next i check for continuity on the white and black wire to the connector and nothing. Soo far i have pulled out the black ecm holder to see where the wire is running but I ran out of daylight so hopefully i can find the break tomorrow.

03-03-2012, 03:08 PM	#13
illgetyou22 Audiworld Junior Member Garage is empty, add now Join Date: Sep 2011 Posts: 16	Sorry for my spelling its been a long day.

03-20-2012, 03:11 PM	#15
illgetyou22 Audiworld Junior Member Garage is empty, add now Join Date: Sep 2011 Posts: 16	Ok so I separated the harness and looked for a break in the wire and nothing so i took apart the ecu connector and push back the plastic and bam the wire wast even connected to the pin. So this weekend I'll be repining and going from there.

03-25-2012, 03:25 PM	#17
illgetyou22 Audiworld Junior Member Garage is empty, add now Join Date: Sep 2011 Posts: 16	Repined the ecu and the car fired right up check engine light is on for something but at least its running.

04-15-2012, 01:13 PM	#20
illgetyou22 Audiworld Junior Member Garage is empty, add now Join Date: Sep 2011 Posts: 16	Hey im back just took the car for a ride and looks like it needs more love feels like it has no power and misfiring below is the codes from the ecu Im also debating selling the car i just dont have time i thought i would have to put into the car and my b6 and b5 s4 are screaming for attention im on the fence.

04-15-2012, 01:13 PM
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