 | Home > Technical > TD5 Rev counter install |
 
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| hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2298   
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12th Jul 2019 4:15pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605  
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Also the CAI version: https://www.defender2.net/forum/topic62582.html
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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12th Jul 2019 6:36pm |
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| klacinak Member Since: 11 Jul 2019 Location: Kunhegyes Posts: 8  
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Thank you Martin! I will have a look at it.
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17th Jul 2019 5:25pm |
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| klacinak Member Since: 11 Jul 2019 Location: Kunhegyes Posts: 8
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Finally, I had some time and got the result. It is working from the ECU (NNN)
https://files.fm/u/h46epws6 I will create and post a summary. Click image to enlarge Click image to enlarge |
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30th Apr 2020 8:53pm |
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| Bingo Member Since: 27 May 2020 Location: Moscow Posts: 84  
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Good afternoon. Please tell me how you connected the VDO tachometer? Have you connected it to pin 19 of the black ECU connector? When the ignition is turned on (before the engine starts working) is the tachometer needle moving? I purchased a tachometer from VW Jetta mk1, connected it to pin 19, but the arrow does not move from 0. I want to understand what the problem may be - whether the tachometer is faulty, or something else... Thanks! Click image to enlarge “A word of command has made these silent figures our enemies; a word of command might transform them into our friends. At some table a document is signed by some persons whom none of us knows, and then for years together that very crime on which formerly the world’s condemnation and severest penalty fall, becomes our highest aim.” — Erich Maria Remarque |
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8th May 2022 5:27pm |
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| klacinak Member Since: 11 Jul 2019 Location: Kunhegyes Posts: 8
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Hi Bingo!
You need to make a PCB to convert the signal for the VDO. I attached the schematics. Any NPN transistor is fine. I think you will need to enable the RPM output of the ECU but let's see if the PCB is enough or not. If you have questions, let me know. Cheers Click image to enlarge |
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9th May 2022 10:17am |
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| Bingo Member Since: 27 May 2020 Location: Moscow Posts: 84
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Hello, Klacinak (Unfortunately, I do not know your name...)! Thank you for the quick response! Unfortunately, I don't quite understand the circuit - the details marked with circles, as far as I understand, are resistors. Please tell me, what is the nominal value of their resistance? Thanks! Click image to enlarge “A word of command has made these silent figures our enemies; a word of command might transform them into our friends. At some table a document is signed by some persons whom none of us knows, and then for years together that very crime on which formerly the world’s condemnation and severest penalty fall, becomes our highest aim.” — Erich Maria Remarque |
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9th May 2022 1:29pm |
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| klacinak Member Since: 11 Jul 2019 Location: Kunhegyes Posts: 8
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Hi Bingo,
their value is 1 kilo-ohm. 1/4 Watt is enough, does not need bigger. Cheers Laszlo |
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9th May 2022 1:53pm |
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| Bingo Member Since: 27 May 2020 Location: Moscow Posts: 84
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Thank you very much, Laszlo!
 “A word of command has made these silent figures our enemies; a word of command might transform them into our friends. At some table a document is signed by some persons whom none of us knows, and then for years together that very crime on which formerly the world’s condemnation and severest penalty fall, becomes our highest aim.”
— Erich Maria Remarque |
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9th May 2022 5:46pm |
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| hydraulic_landy Member Since: 21 Dec 2021 Location: Bavaria Posts: 9  
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Hi all
could the signal, coming from ECU Pin 19, switched on/off via Nanocom? somewhere in the forum I've seen a picture of the nanocom screen there was shown "Tacho: enable/disable" but I can not find this picture right now and I didn't find this "switch" on my nanocom Background: I fitted a used VDO rev counter with the above mentioned additional electronic, but it didn't work. I don't know whether the rev counter is broken or the signal is not okay, maybe switched off? Thanks Peter |
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19th Jan 2024 6:04am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Have you tried a pullup resistor?
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jan 2024 6:32am |
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| hydraulic_landy Member Since: 21 Dec 2021 Location: Bavaria Posts: 9
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I tried not the pullup solution, I tried instead the solution shown in the video:
Maybe that's wrong for the VDO type Peter |
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19th Jan 2024 8:35am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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What’s the solution in the video?
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jan 2024 8:58am |
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| TexasRover Member Since: 24 Nov 2022 Location: Paris Posts: 1049  
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It looks to be the same solution that I used, which is to just connect it and it works.
He is saying there is a pull up resister build into the tacho, possibly I dunno, but I bought a similar looking 52mm tacho on Amazon for ~euro 35 and it worked. I did have to adjust the little pot meter at the back and pull a new cable as my loom did not have a cable. |
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19th Jan 2024 9:06am |
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