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Title: Relationship between ECU and TCU Post by: gruppe5 on February 08, 2017, 08:31:07 PM Can anyone explain it? I ask because I get a "incompatible" message on a 4.2 swapped C5 A6 ( originally a 3.0 ) How does the ECU know which TCU is connected and furthermore can that be programmed out??
Title: Re: Relationship between ECU and TCU Post by: k0mpresd on February 09, 2017, 02:45:09 AM 3.0 = 5hp19, 4.2 = 5hp24, is why you receive that message.
if you used the original 3.0 gearbox/tcu, this can be fixed in the 4.2 ecu software very easily. if you used the original 4.2 gearbox, then you should be using 4.2 tcu as well. Title: Re: Relationship between ECU and TCU Post by: gruppe5 on February 09, 2017, 01:04:20 PM 3.0 = 5hp19, 4.2 = 5hp24, is why you receive that message. if you used the original 3.0 gearbox/tcu, this can be fixed in the 4.2 ecu software very easily. if you used the original 4.2 gearbox, then you should be using 4.2 tcu as well. I used the original 3.0 transmission ( 5HP19 ) and ECU. I could not find the solution anywhere I looked, right now I am trying a different TCU from a 2.7t but if you have a solution it would be great. The error message was 18249 - Engine Control Module / Transmission Control Module Incompatible Title: Re: Relationship between ECU and TCU Post by: k0mpresd on February 10, 2017, 06:11:15 AM i know solution. tcu swap is not it, 2.7t = 5hp19 as well.
Title: Re: Relationship between ECU and TCU Post by: gruppe5 on February 10, 2017, 07:28:34 AM i know solution. tcu swap is not it, 2.7t = 5hp19 as well. I figured it was worth a shot (ECU swap) but that did not work. Right now I cant move the car unless I push it, what can I do? Title: Re: Relationship between ECU and TCU Post by: nubcake on March 13, 2017, 02:40:56 PM CANVERS, FMOTC, CWGC in the ECU.
Set those to proper values to match those in TCU. (Better late than never, huh?) :D PS: PM if you can't figure it out yourself. Title: Re: Relationship between ECU and TCU Post by: 10101011 on March 23, 2017, 11:34:28 AM I figured it was worth a shot (ECU swap) but that did not work. Right now I cant move the car unless I push it, what can I do? Have you tried to contact NYET on this forum ?? How did that cylinder head I sold you work out the 2.0T ? ;D |