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Title: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on May 31, 2020, 05:56:01 PM No communication with slave ECU, can't connect to adress 11 in VCDS. Happened after OBD-Flash failed.
I know both ECUs are physically the same. What about master and slave? Is it just data or/and cable select by the ecu harness as well? I can see differences in EEPROM and MICRO. Couldn't find any info on this so far.. Full BDM readout attached Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on June 01, 2020, 02:12:47 PM car starts but runs on bank1 only
can someone please check my dumps Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on June 03, 2020, 01:45:09 PM eeprom and micro from master flashed to slave and vice versa - car won't even start, but turning on the fan :P
most likely (initial) slave ecu hardware fault Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: IamwhoIam on June 04, 2020, 02:02:32 PM The 2 backups you've posted in the first post are both valid. Your car should run
Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on June 15, 2020, 03:45:23 PM slave ecu hardware fault confirmedcouldn't find this anywhere so here we go: Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: aef on June 15, 2020, 11:19:22 PM What is wrong with the slave ecu?
Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: gman86 on June 16, 2020, 05:15:53 AM I find it mighty coincidental that the slave ECU packed a sad just because of a bad OBD write. They are always recoverable with BDM/bench restore. Are you sure you didn't copy the dodgy software onto the good ECU?
Also, EEPROM, MPC and Flash are identical on both ECUs. Master/Slave is dictated by wiring. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: gremlin on June 16, 2020, 09:46:45 AM Also, EEPROM, MPC and Flash are identical on both ECUs. Master/Slave is dictated by wiring. Invalid statement. Master/Slave flash is identical, but MPC and eeprom differ significantly. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: prj on June 16, 2020, 10:15:57 AM Invalid statement. Master/Slave flash is identical, but MPC and eeprom differ significantly. More accurately, the OBD flashable area is identical. But yeah, you can't just flip ECU's around on these. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: gman86 on June 30, 2020, 04:17:21 AM Invalid statement. Master/Slave flash is identical, but MPC and eeprom differ significantly. I'm gonna call bullshit on that. I literally just shipped two ECUs back to a customer and the flash + MPC are IDENTICAL. You're welcome to receive the full backups of said ECUs. EEPROM differences will be down to each ECU storing adaptive values for their prescribed functions. Given that MED9 master and slave in all the SSPs is documented as wire selection, I'm inclined to lean towards my original statement being factual. The fact the VAG part numbers are identical is testament enough as there's not two different SGOs for master/slave. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: IamwhoIam on June 30, 2020, 04:52:40 AM I'm gonna call bullshit on that. I literally just shipped two ECUs back to a customer and the flash + MPC are IDENTICAL. You're welcome to receive the full backups of said ECUs. EEPROM differences will be down to each ECU storing adaptive values for their prescribed functions. Given that MED9 master and slave in all the SSPs is documented as wire selection, I'm inclined to lean towards my original statement being factual. The fact the VAG part numbers are identical is testament enough as there's not two different SGOs for master/slave. Incorrect AF. "6C00" area which in MED9.1.2 is at $2400 in the MPC is unique to each ECU. N00b. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: gremlin on June 30, 2020, 04:57:36 AM I'm gonna call bullshit on that. I literally just shipped two ECUs back to a customer and the flash + MPC are IDENTICAL. You're welcome to receive the full backups of said ECUs. EEPROM differences will be down to each ECU storing adaptive values for their prescribed functions. MCU dumps are not identical. They differ in 1024 RSA bytes. EEPROM differ not only in adaptive values. Some EEPROM bytes are also configured according to the contents of RSA bytes. Thus, you need to have a matched pair of MCU+eeprom so that the unit successfully starts work. Given that MED9 master and slave in all the SSPs is documented as wire selection, I'm inclined to lean towards my original statement being factual. The fact the VAG part numbers are identical is testament enough as there's not two different SGOs for master/slave. The reason is that there is only one SGO for the master / slave, because the memory area with RSA is not overwritten when updating the ECU firmware Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: gman86 on July 01, 2020, 04:04:28 AM Incorrect AF. "6C00" area which in MED9.1.2 is at $2400 in the MPC is unique to each ECU. N00b. 0x2400 is FFville, but thanks for playing. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: IamwhoIam on July 02, 2020, 01:20:31 AM 0x2400 is FFville, but thanks for playing. Yeah my bad, it's 0x2000 not 0x2400, compare your 2 CPUs before pretending like you know it all seen it all when in fact you don't have a clue WTF you're talking about. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on August 08, 2020, 09:09:49 AM I find it mighty coincidental that the slave ECU packed a sad just because of a bad OBD write. After I realised that the flash failed I started pullin fuses because of the fans. The idea was to try to recover it via obd. I should have removed the ecu right away for bdm on bench. Most likely it would have worked again. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: mdccode5150 on October 09, 2020, 10:49:39 PM I'm gonna call bullshit on that. I literally just shipped two ECUs back to a customer and the flash + MPC are IDENTICAL. You're welcome to receive the full backups of said ECUs. EEPROM differences will be down to each ECU storing adaptive values for their prescribed functions. Given that MED9 master and slave in all the SSPs is documented as wire selection, I'm inclined to lean towards my original statement being factual. The fact the VAG part numbers are identical is testament enough as there's not two different SGOs for master/slave. I doubted, but you are right I looked at the master / slave and all files are the same! But I did find a Bosch e-mail that said there where problems with technicians swapping the plugs...Then the slave would have phantom misfires on the Slave only. My thoughts are that after installation they adapt, and can't be swapped after that. Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on November 12, 2020, 02:11:25 PM low boost issue, any suggestions?
3rd gear pull, wgdc pretty low log (https://log.tunezilla.com/chart/444126#H8KLCABUwp/CrV8CA23CjsORDsKCMAxFw7/CpcOPXcOCIsOqw4csPFRXYcOJw5hIVwjDusO1AksMDz7CtsOnw57DkzoHw4JjXsOYeFIqwqzCgBZtwocOwp55fMKEw4TCpsKXPE8FwrDCqcOLwpglfHgbEXpOLMKkDMKVwqTChUXCjWbCsxpaw4PDnsKowp0hw7jCk8K9w4EbwqrDjMK8E8Oyw57CvH9hwpDDkA96w4jCtsOkCcK4Bi/DmMOiFcOvw7tnYMKPCMONwprDixTDg8KhwrTDrcO/Qy/CisKFwrvDrgswbsKwwrvDpQAAAA==) no faults, this has to be PID I guess Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on November 12, 2020, 02:30:52 PM tune
Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: prj on November 19, 2020, 10:33:29 AM WGDC is not low. If it makes 0.6 bar boost with 60% wgdc it's time to replace the turbos or fix the boost leaks/dump valves.
Title: Re: MED9.1.2 RS6 V10 ECU Master/Slave Post by: f-schlauch on November 19, 2020, 03:37:25 PM WGDC is not low. If it makes 0.6 bar boost with 60% wgdc it's time to replace the turbos or fix the boost leaks/dump valves. Thanks for the input I did get a n249 fault the other day and noticed compressor surge once Also I didn't trust that tune, so I went back to stock and just upped the boost a little Will figure this out as soon as I get back to the car |