No speed signal to ECU

Discussion in 'Technical' started by tuff, Apr 17, 2018.

  1. tuff

    tuff Member

    Ok I've aboit had it with this car already. So everything was running fine sunday, i drove aboit 300km, and then yesterday whilst driving and datalogging and doing diagnostics on the engine i now have a hicas light, heavy steering BUT i have a speedo and all other dash instruments working.

    So, i tested the back of the speedo, we have a steady AC signal that increase with speed so wehave sigmal from the speed sensor, no output signal on FIVE DIFFERENT DASH CLUSTERS, now if it was one or two i would understand, but 4 of them is sounding very suss to me, i dont see the possibility of 5 having soldering issues Ive double checked the hicas ecu amd the engine ecu to double check but definitiely no signal, conzult shows no speed during diagnostics.

    Someone help me here, what am i missing?
     
  2. tuff

    tuff Member

    And did i mention absolutely no friggin fault codes at all
     
  3. tuff

    tuff Member

    I guess the next question is the speedo output to the speedometer the same signal then sent to the ecu? Could i effectively just use a briged wire between the two screws relating to speedo input amd speedo output?
     
  4. tuff

    tuff Member

    Ok im beyond fucking livid right now, i just worked out the problem. It was the conzult usb adapter and cable connected up to the fucking laptop. I found a post on aus300 where someone had the exact same problem as me and it was his usb adapter, yeah right i fucking thought..... but it ate at me so i went and took it for a drive with it disconnected. Well fuck me, it now pulls like a fucking freight train (id say fpcu and pump where my problems) and no hicas issue. Plug in my bluetooth track racing dongle, hey Presto, we have speed output..... not a frigging happy camper, that is 2 days of diagnostics... grrrraaaaahhh
     
    DazzaZ32 and pmac like this.
  5. pmac

    pmac Z,, IT'S COMPLICATED!!!!!

    Well done sorting it out Scott, was this the red car? As you well know nothing comes easy on these cars.
    Also most of the answers can thankfully be found on on this amazing forum.
    The young guys that think the answers are on Facebook and just end up with unqualified opinion and chasing their tails have a lot to learn.
     
    DazzaZ32 and MagicMike like this.
  6. DazzaZ32

    DazzaZ32 Active Member

    You have my permission to smash it with a hammer !!!!!
     

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