ibizacupra
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« on: February 19, 2014, 10:24:40 AM »
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Me7.5, Audi TT QS... 018CA ecu... Car has intermittent N75 activity... mostly no duty cycle being applied to it and subsequent actuator only pressure.. During a drive for no apparent reason, n75 function will resume, and n75 duty cycle starts and its performing like it should.. However, no fault codes for anything for soft limp mode. IF when its woken up and n75 works, and you cycle the ign, you loose N75 again, and still no fault codes. New N75, works in output tests, plumbed correctly. ECU on vcds block 118 is not outputting any % duty cycle when the cars in its no n75 mode.. Request boost request is std QS levels (2000-2100mb). Read ecu files, and 95040 chip as backup. File is bog stock. Flashed a std bam 018H file into it and again, no N75 function.. Flashed immo defeat onto different ecu, std 018H file on it and it worked, N75 duty cycle worked. Flashed QS 018CA file onto another ecu, with its 95040 info and again no workie... Now, last test different ecu, modded 018H file for QS boost levels, immo defeated, first drive out, alls working.. Return and turn off, then restart again, no N75 again... wtf is occuring? I'm out of ideas here. Different ecu, different file, immo off.... same thing. No Fault codes at any time. Packet of biscuits to whoever can solve this puzzle! thx Original immo off test file and readback after short drive and ign cycle resulting in no n75 again... Can someone help describe whats changed and perhaps why? No DTCs appearing at all on vcds  |
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nyet
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« Reply #1 on: February 19, 2014, 10:32:06 AM »
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Logs.
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vdubnation
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« Reply #3 on: February 19, 2014, 02:02:52 PM »
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Have you checked the wiring from the n75 plug to the ecu ?
Had a similar issue with a b1 s1 o2 ran new wires directly to ecu and issue was resolved.
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ibizacupra
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« Reply #4 on: February 20, 2014, 07:36:13 AM »
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Have you checked the wiring from the n75 plug to the ecu ?
Had a similar issue with a b1 s1 o2 ran new wires directly to ecu and issue was resolved.
unplugging n75 and ecu see's unplug and pops a faultcode on output test n75 clicks on off fine wiggling all wiring near it doesnt effect it if ign on, clear codes (no codes present) and start we have n75 working then start car all works.. ign off and restart no n75, no fault codes, and if engine is still running clearing them does not bring n75 back top life.. this ones a doosey! arghhhhhh |
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userpike
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« Reply #5 on: February 20, 2014, 08:06:30 AM »
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disco biscuits?  |
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ibizacupra
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« Reply #6 on: February 20, 2014, 09:06:30 AM »
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wired n75 direct to ecu..
same thing..
tried oe software on org ecu
tried another 225 018h software on org ecu
swapped ecu tried both oe software and 018h software
it will at best start from no % to n75 then spring to life for no apparent reason and work.. until you turn it off again, and it will not work again.
stumped
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userpike
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« Reply #7 on: February 20, 2014, 05:20:07 PM »
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this has me stumped also...seems like it could only be hardware/wiring.
Could something else be shorting out and drawing the current away from the N75? like something you coded out but still have physically equipped?
you sure the address to the map you are changing is correct?
IDK..wierd issue you have there, please post the fix and actual problem after you figure it out.
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« Last Edit: February 20, 2014, 05:27:23 PM by userpike »
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ddillenger
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« Reply #8 on: February 20, 2014, 05:38:52 PM »
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No chance you're running a 2.0 ecu?
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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ibizacupra
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« Reply #9 on: February 21, 2014, 06:39:41 AM »
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No chance you're running a 2.0 ecu?
No, ecu oe one is 018CA TTQS Tried other wideband box, 018H TT225 software, std, modified, mapped.... and seemingly every combination possible.. vvt disabled, enabled Wired N75 direct to ecu output from 12v feed.. (did'nt cut off/isolate the factory output, just disconnected factory n75 plug and used my test lead direct. Odd idle behaviour also... idle will raise to 1050rpm from 880rpm norm and sit high for ages, blip throttle and it will rev quick and clean and return to 880rpm.. if i blip throttle to 5krpm, revs take an age to drop sometimes, but not others.. Coincidence? I dont know. Swapped throttle body for a "was working when removed" one and it would fail basic settings.. Replaced throttle body a.n.other spare here and that worked ok, passed 060 tba fine. Weridly.. again.. seems like there's a lot of this on this car, if I run the car on and off load (on my dyno) after key start, it will sit 0% N75 but come to life at some random point whilst I go on the gas on and off repeatedly.. Whe it does come to life, it stays alive until you next cycle ign then its gone again. No codes being thrown at all during this. IF I prod the throttle rapidly full on off on off on off, making the car jolt when taking up load on off (low rpms 1500-3500rpm) the N75% comes to life only after a short delay. Car presently is wired back as std on factory wiring I should mention. Never ever seen such a thing Is there anything likely between the throttle revs on idle raising on their own (whilst 062 block on throttle remains 12.9% ) and the rev hangs which it randomly suffers? |
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vdubnation
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« Reply #10 on: February 21, 2014, 06:49:20 AM »
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Possibly a bad ground had a MK5 a while back did some crazy things made a grounding kit all the weird problems went away.
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ibizacupra
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« Reply #11 on: February 21, 2014, 07:44:13 AM »
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Possibly a bad ground had a MK5 a while back did some crazy things made a grounding kit all the weird problems went away.
hmmm. At this point I will consider pretty much anything.. lol I'll add/check some grounds. TTQS has battery in boot as std after all... some distance for the voltage to travel I guess.. remote earthed vs motor.. wish me luck! thx |
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phila_dot
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« Reply #12 on: February 21, 2014, 08:50:04 AM »
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Any reason why you can't get ME7L logs?
You should be able to see where/why it's happening by logging the right variables.
Is B_ldr being set?
Is LDRPID outputting 0%dc or is it getting cut down in LDTVMA?
Is it being triggered in DLDR?
If you're logging 0%dc then the cause is being registered in the ECU somewhere and the list isn't really that long.
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ibizacupra
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« Reply #13 on: February 21, 2014, 10:22:51 AM »
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Any reason why you can't get ME7L logs?
You should be able to see where/why it's happening by logging the right variables.
Is B_ldr being set?
Is LDRPID outputting 0%dc or is it getting cut down in LDTVMA?
Is it being triggered in DLDR?
If you're logging 0%dc then the cause is being registered in the ECU somewhere and the list isn't really that long.
thanks for posting phil just got me7 logger going (I dont use it much, but it connected first time on this car  ) N75 output duty cycle is sat at zero.. logged B_ldr is 0 until I prod acc pedal on off rapidly and it will come to life. linked logged parameters.. and the read file from this std TTQS for ref. >> ECU read>> http://www.badger-5.com/bin/ttqs_stuff/8n0906018ca-0261208086-1037375111-qs-read>> csv logged just now whilst its sat on my dyno>> http://www.badger-5.com/bin/ttqs_stuff/8n0906018ca-0261208086-1037375111-qs-read_template_20140221_170847.csv |
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nyet
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« Reply #14 on: February 21, 2014, 10:27:46 AM »
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Please add pedal acceleration and throttle plate angle to your logs.
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