perplexed - Page 2

scarman · 05-02-2012, 03:46 PM

Ummm..., sure. But this was in answer to the specific question that was asked 2 or 3 times, "Is there a specific cranking time for a no-start condition, time for the ECU to even recognize there is a problem?"

And, the answer continues to be, NO, the codes are non-volatile, and will be there when you turn the key on, rather than some, like the 5000 that did not retain these codes but required a specific cranking time or revolutions to read codes, so it could not be done without the engine running as you can with the UrS vehicles, unless you cranked the engine over with the starter.

mURS4 · 05-02-2012, 08:40 PM

Turns out, according to SJM, there IS a specific cranking time in a no start scenario. 5 seconds. THEN the codes can be accessed.

BUUUUUUTTTT My CEL is not illuminated. At all. When replacing bulbs in the instrument cluster, I must have switched the CEL and the seat belt pigtail. Way to line myself up for confusion later.!!

My ECU is NOT communicating. It also is NOT popping 5a fuse #26.

When I install my known bad ECU. pop.

I have a bit more of a problem than I thought.

Good place to start pokin around with a MM? oi.

time for a bentley.. no? ;p

UrS4boy · 05-02-2012, 10:59 PM

Have you fixed the bulb and the bulb position in the instrument cluster so the Check Engine Light comes on when the ignition is turned on. We can't help you further until you at least have a CEL.

scarman · 05-03-2012, 04:35 PM

Could you write that with a straight face? How in hell would you know you had a no start problem if you didn't crank for 5 seconds?

But, you only have to crank to set the codes if you have cleared them. In normal use of the vehicle, the codes remain when the key is turned off.

mURS4 · 05-05-2012, 01:52 PM

Definitely didn't have a grin on. I have been disconnecting the battery, not trusting my previous -14v condition. I understand what you are saying about the codes being non-volatile. Thank you for the info.

Looking at someone else's no start thread, I'll be checking for power @ T55/18(iirc) and the main relay hub hopefully today.

I'll post results/concerns if needed.

dankje dankje

05-02-2012, 10:59 PM	#13
UrS4boy AudiWorld Super User Garage is empty, add now Join Date: Feb 2001 Posts: 18,183	Have you fixed the bulb and the bulb position in the instrument cluster so the Check Engine Light comes on when the ignition is turned on. We can't help you further until you at least have a CEL. __________________ 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

05-03-2012, 04:35 PM	#14
scarman AudiWorld Senior Member Garage is empty, add now Join Date: Sep 2009 Location: Knoxville, TN Posts: 610	Could you write that with a straight face? How in hell would you know you had a no start problem if you didn't crank for 5 seconds? But, you only have to crank to set the codes if you have cleared them. In normal use of the vehicle, the codes remain when the key is turned off. __________________ Tom '95 S6 '95.5 S6 avant

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05-02-2012, 08:40 PM	#12
mURS4 AudiWorld Newcomer Garage is empty, add now Join Date: Apr 2012 Posts: 8	Turns out, according to SJM, there IS a specific cranking time in a no start scenario. 5 seconds. THEN the codes can be accessed. BUUUUUUTTTT My CEL is not illuminated. At all. When replacing bulbs in the instrument cluster, I must have switched the CEL and the seat belt pigtail. Way to line myself up for confusion later.!! My ECU is NOT communicating. It also is NOT popping 5a fuse #26. When I install my known bad ECU. pop. I have a bit more of a problem than I thought. Good place to start pokin around with a MM? oi. time for a bentley.. no? ;p

05-05-2012, 01:52 PM	#15
mURS4 AudiWorld Newcomer Garage is empty, add now Join Date: Apr 2012 Posts: 8	Definitely didn't have a grin on. I have been disconnecting the battery, not trusting my previous -14v condition. I understand what you are saying about the codes being non-volatile. Thank you for the info. Looking at someone else's no start thread, I'll be checking for power @ T55/18(iirc) and the main relay hub hopefully today. I'll post results/concerns if needed. dankje dankje

05-05-2012, 01:52 PM
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