iceman Posted May 22, 2020 Report Share Posted May 22, 2020 Sorry, just dug out my wiring notes specifically for my Z32, so to be clear: I have the yellow and green wire to Aux 5. This wire goes to the speedo. I have DI 6 tapped to a VSS (auto trans) speed source for LR wheel speed. The modifying circuit goes on the Aux wire between ecu and speedo. The LINK ecu obviously modifies the signal between the DI in and Aux out to correct the speedo. When I say the yellow and green wire, it is specific to the Z32 (and probably other Nissan product of that era) on the large white chassis wiring connector behind the AC condensor, under the glovebox. No doubt if you felt particularly masochistic, you could also solder in a dedicated Aux out wire on the large circuit track on the back of the speedo gauge itself... Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 22, 2020 Report Share Posted May 22, 2020 Ok, I understand the yellow/green connection from the speedo to a aux out put, aux 2 in my case. With the DI, are you saying I should take a wire off say the wire connected to eg; DI 12 ( RF wheel sensor ) and connect it to DI 4 ( in my case ) and use DI 4 as the source for the speedo output ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 22, 2020 Report Share Posted May 22, 2020 54 minutes ago, lostsoul said: Ok, I understand the yellow/green connection from the speedo to a aux out put, aux 2 in my case. With the DI, are you saying I should take a wire off say the wire connected to eg; DI 12 ( RF wheel sensor ) and connect it to DI 4 ( in my case ) and use DI 4 as the source for the speedo output ? Huh? You've lost me... So have you got 4 individual wheels speeds connected and a seperate gearbox sensor too? Or just 2 front wheels and the gear box sensor for the rear? Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 22, 2020 Report Share Posted May 22, 2020 4 x Wheel Speed sensors connected to DI 11,12,13,14 ... the gearbox speed sensor is currently connected to DI 4 and the Speedo is currently connected to aux 2 but most likely not with the correct wire as it turns out? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 22, 2020 Report Share Posted May 22, 2020 If you have 4 wheel speeds, then you dont even need the gearbox speed sensor. You can disconnect that. In your speedo out settings set the source to non driven wheel speed. Then in the chassis and body>speed sources menu make sure you have a non driven wheel speed source assigned. Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 22, 2020 Report Share Posted May 22, 2020 Like this ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 22, 2020 Report Share Posted May 22, 2020 yep Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 22, 2020 Report Share Posted May 22, 2020 Thanks Adam Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 28, 2020 Report Share Posted May 28, 2020 Na, speedo still not adjusting. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 28, 2020 Report Share Posted May 28, 2020 So if you put Aux 2 in test PWM mode does your speedo respond now? Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 29, 2020 Report Share Posted May 29, 2020 Just tried the test PWM thing .... all I get is a "knocking" sound from the front of the car, somewhere ? No changes to any frequencies or the multiplier get any response form the speedo. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 29, 2020 Report Share Posted May 29, 2020 Then your speedo is still not connected to the ecu. Quote Link to comment Share on other sites More sharing options...
lostsoul Posted May 31, 2020 Report Share Posted May 31, 2020 Ok, progress of sorts, I think .... found the wire which goes from the gear box speed sensor to the speedo. Disconnected from the gearbox sensor and connected it to aux 2. Set aux 2 to "test PWM", the speedo needle moves from zero to 70kph with the aux 2 frequency at 200hz. If I reduce the frequency to 35hz the needle will come back zero. Does this have any berrying on the "offset" and/or "max" frequencies in "Speedo Out" ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 31, 2020 Report Share Posted May 31, 2020 Ok so now set aux 2 back to speedo out, then in the speedo out settings, adjust the multi until you speedo reads the correct speed. Offset would usually be zero. Quote Link to comment Share on other sites More sharing options...
lostsoul Posted June 3, 2020 Report Share Posted June 3, 2020 All working now, had to use 2.89 multiplier thou ? Quote Link to comment Share on other sites More sharing options...
smason Posted June 3, 2020 Report Share Posted June 3, 2020 2 hours ago, lostsoul said: All working now, had to use 2.89 multiplier thou ? Yeah mine is upwards of 4.034 or something on a Nissan S13 Quote Link to comment Share on other sites More sharing options...
Sam Flay Posted September 5, 2020 Report Share Posted September 5, 2020 On 1/2/2020 at 4:42 AM, iceman said: Google once again is your friend... Is that a 1uF capacitor on the Aux output with a 22k ohm resistor on the ground? Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 5, 2020 Report Share Posted September 5, 2020 correct. Quote Link to comment Share on other sites More sharing options...
Sam Flay Posted September 23, 2020 Report Share Posted September 23, 2020 So one of these https://uk.farnell.com/rubycon/50px1mefc5x11/cap-1-f-50v-20/dp/2346598 and one of these https://uk.farnell.com/cgs-te-connectivity/c1022rjl/res-22r-5-10w-axial-wirewound/dp/2805114 Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 23, 2020 Report Share Posted September 23, 2020 Go for a ceramic cap so polarity doesnt matter. https://uk.farnell.com/vishay/k105z20y5ve5th5/ceramic-capacitor-1uf-25v-y5v/dp/5812770 And you only need a 1/4W resistor, example: https://uk.farnell.com/multicomp/mcf-0-25w-22k/res-22k-5-250mw-axial-carbon-film/dp/9339310 Sam Flay 1 Quote Link to comment Share on other sites More sharing options...
Sam Flay Posted September 24, 2020 Report Share Posted September 24, 2020 Thanks Adam much appreciated. Quote Link to comment Share on other sites More sharing options...
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