Results 1 to 9 of 9

Thread: WHERE DO I PICK UP RPM SIGNAL ON D2 V8

  1. 11th April 2016, 06:14 PM #1
    Roverlord off road spares
    Roverlord off road spares is offline AT REST
    Major part of the heart and soul of AULRO.com
     Vendor

    Subscriber
    Join Date
    Jul 2012
    Location
    Tecoma Vic
    Posts
    9,642
    Total Downloaded
    0

    WHERE DO I PICK UP RPM SIGNAL ON D2 V8

    I posted this in the LPG section, but putting out here as I might get a response.

    I need to pick up the RPM signal to connect the rpm wire for a PRINS sequential LPG system.

    I took a system of a donor D2 and it got it's signal from the coil pack, but the instructions from the manufacturer states not to use the coil pack.
    With the signal receiving wire connected to the coil pack it does not display a steady RPM, it fluctuates up and done from 600 - 3900 rpms. this will not allow the LPG ECU to calibrate correctly and causes an error.
    Googling has not been any help.

    So what wire can I tap into to get the correct signal for RPM
    I have used the coil pack wire another LPG sequential system and it worked, but not with this prins system.

    cheers, Mario

    Reply With Quote Reply With Quote
  2. 11th April 2016, 06:27 PM #2
    Road Stone Guest
    I was always under the impression it was from the alternator, but not 100% on that.


    One the V8 110 I had it was the prop shaft.


    Cheers, Jerry
    Reply With Quote Reply With Quote
  3. 11th April 2016, 07:30 PM #3
    schuy1 Guest
    According to the wiring diagram in RAVE the Tachometer gets its signal from the ECU. However I think there is an output on the alternator, is it 'w'? Not 100% sure but that may be a good place to start.
    Cheers Scott
    Reply With Quote Reply With Quote
  4. 11th April 2016, 08:04 PM #4
    sierrafery's Avatar
    sierrafery
    sierrafery is offline YarnMaster Silver Subscriber
    Join Date
    Jul 2014
    Location
    west of Transylvania
    Posts
    3,783
    Total Downloaded
    0
    The PWM signal for tachometer is on ECU's connctor C0637 pin 17 (white/grey wire) if that's what you need.(see RAVE-Electrical library-Connector views)
    Discovery Td5 (2000), manual, tuned
    Reply With Quote Reply With Quote
  5. 11th April 2016, 08:30 PM #5
    Mark Adams
    Mark Adams is offline Fossicker Vendor
    Join Date
    Sep 2012
    Location
    Shropshire, United Kingdom
    Posts
    41
    Total Downloaded
    0
    Quote Originally Posted by sierrafery View Post
    The PWM signal for tachometer is on ECU's connctor C0637 pin 17 (white/grey wire) if that's what you need.(see RAVE-Electrical library-Connector views)
    Spot on. It's a 12V square wave, at four pulses per revolution.
    Reply With Quote Reply With Quote
  6. 11th April 2016, 09:39 PM #6
    sierrafery's Avatar
    sierrafery
    sierrafery is offline YarnMaster Silver Subscriber
    Join Date
    Jul 2014
    Location
    west of Transylvania
    Posts
    3,783
    Total Downloaded
    0
    Quote Originally Posted by Mark Adams View Post
    Spot on. It's a 12V square wave, at four pulses per revolution.
    Actually is 0-5V at 2 pulses/rev
    Discovery Td5 (2000), manual, tuned
    Reply With Quote Reply With Quote
  7. 11th April 2016, 10:36 PM #7
    Roverlord off road spares
    Roverlord off road spares is offline AT REST
    Major part of the heart and soul of AULRO.com
     Vendor

    Subscriber
    Join Date
    Jul 2012
    Location
    Tecoma Vic
    Posts
    9,642
    Total Downloaded
    0
    After doing some more investigation I believe that the problem with the signal from coil is that I need to install a separate RPM module.
    Prins make a module which gets it's signal via a wire a coil into the RPM module and then exits the module and goes to the GAS ECU.
    Cheers, Mario

    Reply With Quote Reply With Quote
  8. 14th April 2016, 08:41 PM #8
    Roverlord off road spares
    Roverlord off road spares is offline AT REST
    Major part of the heart and soul of AULRO.com
     Vendor

    Subscriber
    Join Date
    Jul 2012
    Location
    Tecoma Vic
    Posts
    9,642
    Total Downloaded
    0
    Quote Originally Posted by sierrafery View Post
    The PWM signal for tachometer is on ECU's connctor C0637 pin 17 (white/grey wire) if that's what you need.(see RAVE-Electrical library-Connector views)
    That's sierrafery, I soldered a wire to it this arvo.
    Then I managed to get RPM signal .
    Next problem was the LPG diagnostic software would not read the RPM correctly.
    The Clog Wogs, don't have any help files on their software, but I emailed them in the Netherlands and they said

    "This is not a bug. Please correct RPM_fac settings.
    This is parameter to calculate factor of multiplication the signal imput. You can easily check everything between 1-20 to adjust correct RPM "

    Yeah ok thanks for the gobbly gook, I didn't have a clue where to do that as there is no help files to tell you where stuff is. Clicking around sections ,flying on a wing and a prayer , I found a section called "sensors" in which I found RPM-FAC. I changed a value to 16 and it gave me an RPM that was close to my nanocoms RPM reading.
    So hopefully tomorrow I can try the auto Calibration of the LPG ECU to the Petrol ECU with a bit more success now that the RPM signal is correct
    Thanks again.
    Cheers, Mario.

    Reply With Quote Reply With Quote
  9. 14th April 2016, 10:43 PM #9
    Slunnie's Avatar
    Slunnie
    Slunnie is offline Swaggie Gold Subscriber
    Join Date
    Jan 1970
    Location
    Central West NSW
    Posts
    14,147
    Total Downloaded
    99.87 MB
    Quote Originally Posted by Roverlord off road spares View Post
    That's sierrafery, I soldered a wire to it this arvo.
    Then I managed to get RPM signal .
    Next problem was the LPG diagnostic software would not read the RPM correctly.
    The Clog Wogs, don't have any help files on their software, but I emailed them in the Netherlands and they said

    "This is not a bug. Please correct RPM_fac settings.
    This is parameter to calculate factor of multiplication the signal imput. You can easily check everything between 1-20 to adjust correct RPM "

    Yeah ok thanks for the gobbly gook, I didn't have a clue where to do that as there is no help files to tell you where stuff is. Clicking around sections ,flying on a wing and a prayer , I found a section called "sensors" in which I found RPM-FAC. I changed a value to 16 and it gave me an RPM that was close to my nanocoms RPM reading.
    So hopefully tomorrow I can try the auto Calibration of the LPG ECU to the Petrol ECU with a bit more success now that the RPM signal is correct
    Thanks again.
    Cheers, Mario.
    Perhaps an extreme version of a speedo correction unit to modify the signal?
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
    Reply With Quote Reply With Quote
« About to purchase my D2 | V8 Engine Failure due to coolant leak »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!