samueljmullen
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« on: October 10, 2020, 12:24:16 PM »
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2001 Volkswagen Cabrio. Tried to program 2 different transponder without success so looking to do immo off so I can get this car moving asap. Thanks in advance!
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timus
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Polo 86c2f 1.8T AUM
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« Reply #1 on: October 10, 2020, 01:04:12 PM »
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Get your 24C02 eeprom memory content and then we can help with immo off  ... or buy one of this cheap immo emulators |
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samueljmullen
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« Reply #2 on: October 10, 2020, 01:15:17 PM »
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I was wondering if I could edit it myself. I’ll get the file uploaded, I’m busy right now. Thanks for your help
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elektronik13
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« Reply #3 on: October 10, 2020, 02:20:18 PM »
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I was wondering if I could edit it myself. I’ll get the file uploaded, I’m busy right now. Thanks for your help
of course you can edit the eeprom yourself but you don't have to, because we'll do it for you if you want but you have to give me all the offset 00 entry so that I can tell you how and what to change if you want to stick to the original file or write it in offset 00 and 60, this string 12 68 30 12 15 13 94 8C 55 AA B2 F1 50 FF 0A FA you don't need to unpin immo but you can choose |
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« Last Edit: October 10, 2020, 02:35:58 PM by elektronik13 »
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samueljmullen
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« Reply #4 on: October 10, 2020, 04:06:09 PM »
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I’m in the process of trying to read the eeprom, I read it once by accident, now I just n need to find out how to install the drivers correctly for the usb341A with ASProgrammer. I have the ECU open with my test lead on it. I can get the usb to recognize it says the eeprom not responding but I think the driver’s not install right yet. I’ve been doing so much with the drivers for VAG and Tacho cables and I have success with them, now just need to find out how to do a good setup on this usb reader
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samueljmullen
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« Reply #5 on: October 10, 2020, 05:16:37 PM »
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I don’t need to bootload the ecu do get the computer to read the eeprom do I? The 1st one I read was from the immobilizer unit but now I can’t get it to read. I’ve read online that some people say it needs to be desoldered, is that correct and I just got lucky with the immo box because it was easy to read
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elektronik13
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« Reply #6 on: October 10, 2020, 05:38:21 PM »
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I don’t need to bootload the ecu do get the computer to read the eeprom do I? The 1st one I read was from the immobilizer unit but now I can’t get it to read. I’ve read online that some people say it needs to be desoldered, is that correct and I just got lucky with the immo box because it was easy to read
you need to desolder eeprom hot air attention, don't overheat the eeprom and then the reading will be correct |
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samueljmullen
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« Reply #7 on: October 10, 2020, 06:37:46 PM »
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I did accident unsolder the wrong eeprom with a heat gun and tin foil -worked great, but I’m only going to do it if I can’t do it another way -I did successfully read the eeprom from the immo box. This is what I found out on the ECU, the eeprom is a Fairchild 24c02 (I read somewhere that’s it’s a 24c08 but I probably misread it. I got the drivers installed correctly and I figured out: good clip connection and both lights indicate -so that’s good. It’s now apparently reading the chip (it doesn’t give me the IC doesn’t respond error) but nothing populates in the field (I’m assuming I need to match the manufactures’ part number in the reader. I tried other model chips and same thing reads but doesn’t display anything. There is another eeprom chip 9025 by ST
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elektronik13
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« Reply #8 on: October 11, 2020, 03:37:54 AM »
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I did accident unsolder the wrong eeprom with a heat gun and tin foil -worked great, but I’m only going to do it if I can’t do it another way -I did successfully read the eeprom from the immo box. This is what I found out on the ECU, the eeprom is a Fairchild 24c02 (I read somewhere that’s it’s a 24c08 but I probably misread it. I got the drivers installed correctly and I figured out: good clip connection and both lights indicate -so that’s good. It’s now apparently reading the chip (it doesn’t give me the IC doesn’t respond error) but nothing populates in the field (I’m assuming I need to match the manufactures’ part number in the reader. I tried other model chips and same thing reads but doesn’t display anything. There is another eeprom chip 9025 by ST
if you want 24C02 it has to be like that, no other i think you need to buy another programmer it's not super good but better than what you got https://pl.aliexpress.com/item/1615435774.htmlI hope this ecu is still alive after the heat gun |
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timus
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« Reply #9 on: October 11, 2020, 05:43:16 AM »
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CH341A based programmer is good enough for SPI and I2C EEPROMS. I use one of those myself.
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elektronik13
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« Reply #10 on: October 11, 2020, 06:31:09 AM »
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CH341A based programmer is good enough for SPI and I2C EEPROMS. I use one of those myself.
I do not know this device CH341A because I don't have it I don't know what problem you have with the driver take photo of good quality ecu PCB I will try to show you which eeprom it is |
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samueljmullen
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« Reply #11 on: October 11, 2020, 09:12:32 AM »
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I’m having problems uploading the pictures;
I think the fairchild 24c02 is the correct eeprom, the last one is the one I accidentally desoldered and my resulting poor sodering job (that’s why I prefer not to desolder unless I absolutely have to. Just to clarify, I shouldn’t have problems reading/writing without soldering? I’ve read online about problems but it appears only when trying to do it through the OBII port
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samueljmullen
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« Reply #12 on: October 11, 2020, 09:14:37 AM »
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I had to change the image sizes
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samueljmullen
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« Reply #13 on: October 11, 2020, 09:17:40 AM »
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I did install in the car after the initial soldering job and all lights acted normal and it would start and quit like normal (still immobilized) so I think the ECU is not damaged, with no significant issues observed, from the heat gun
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samueljmullen
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« Reply #14 on: October 11, 2020, 10:26:26 AM »
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Not trying to veer off topic but I might have found out why I can’t finish programming the key because of a 8 digit precode?). I tried to use a BMW key with the same transponder but maybe I need a volkswagen key? I used the BMW key because I already drilled out my ignition so I didn’t need the proper blade cut.
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