996 Tacho Not Working

Discussion in 'Newbies Hangout' started by Dallypro, Jun 14, 2025.

  1. Hi All

    Been a while since I made the original post - I elected to get on and enjoy the bike over the summer and tackle the not working tacho once the season had come to an end

    So....here we go

    Further developments since my original post:

    - I have used my multimeter to check the output between the green/grey and earth (i used the metal headlight frame). There is a signal, and it is variable with revs. I would therefore assume that the ECU is firing out a signal and at this time will assume it is the correct one (as found by Luigi Moto). I tested both voltage and Hz% - and both were increasing with increased revs.

    - While poking about, I accidently bridged the connection between the Yellow/White on the loom side, and blue wire that enters the tacho. This turned the oil pressure light on (which also hadn't been working).

    - I've checked the voltage across the battery. 12.7 at rest and 13.7 running with some moderate revs (couldn't tell you what as i don't have tacho, but i wasn't ripping the nuts off it!!). This would seem to indicate that the charging circuit and RR are working correctly?

    I am now pondering 2 options

    1. The tacho is just duff
    2. There is a bad earth

    I don't have a signal generator to test the tacho, and I am unsure how to check the earth (any advice?). I have nipped the 3 screws up on the back as tight as I dare.

    Any further advice on next steps? Places to poke the multimeter without me blowing fuses (yes....i did that as well)

    Cheers

    Alex
     
  2. Borrow a tacho? Where abouts are you? Mine's easy to take out as the fairings are off.
     
  3. Id love to borrow a tacho but appreciate its a bit of a big ask!

    I'm in Carmarthen
     
  4. I'm in Fishguard, mines a 996 SPS, welcome to check voltages, might stir me into starting it
     
  5. See above, mines an sps, does your tacho have a part number on it ?
     
  6. I'm passing next Saturday
     
  7. Ive been looking at I cant see a part number. Its a "Ducati Racing" with Min-1x1000 in the bottom right corner. I understand there are a fair few variations!
     
  8. Sod's law, I'm away next weekend!
     
  9. Anything on the back ? I'll get mine out and look
     
  10. Cheers!

    Hopefully I've attached some pictures.

    I've also got a 16M ECU. Not sure if that makes a difference or not.

    PXL_20251018_151551440.jpg

    PXL_20251018_151539811.MACRO_FOCUS.jpg
     
  11. I'll pull mine out , @chrisw will mine from an sps work ?
     
  12. OK. Im not 100% if they are interchangable or not. Do you know what model of ECU you have? If both bikes are running the same i guess they are compatible
     
  13. Mines the Sps ecu
     
  14. From memory, I am pretty sure that a 16M tacho doesn’t work on a bike with a P8 ecu.
     
  15. Yes, thanks, they look similar but have differences in markings on the rear for sure,
     
  16. I'll take a look at the monster tacho
     
Do Not Sell My Personal Information