Hellen64 revb 91Miata VSS

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Kristian
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Hellen64 revb 91Miata VSS

Post by Kristian »

Hi, I've wired up temp VSS signal from the dash. I have confirmed that the dash output is 5 volts when high, and 0 volts when low, and that it switches state as the car moves. I have hooked the wire up to 1M, VSS input, I have configured tuner studio to use 1M as VSS input, but I cannot see a vehicle speed reading on the data logs. I've looked at the spaghetti diagram and I can see an input called VSS IN, connected to P33. I can see the pull up resistors R20 and R23, but if I test between these resistors (in particular R32) and P33, I read some 14K Ohms. should this be less or am I misunderstanding the design? Do I need to run a link between P33 and R32 to get VSS to work?
Thanks in advance.
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Hellen64 Maita 91-94 revb
Hellen64 Maita 91-94 revb
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Screenshot of the spaghetti diagram
Screenshot of the spaghetti diagram
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1991 1.6 Mazda Eunos Roadster, 5sp, Normally Aspirated
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AndreyB
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Re: Hellen64 revb 91Miata VSS

Post by AndreyB »

Just made an improvement in the firmware - at least we will have VSS front event counter https://github.com/rusefi/rusefi/issues/4173

But did not have a chance to test it so far :(
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BeerMoneyMotorsports
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Re: Hellen64 revb 91Miata VSS

Post by BeerMoneyMotorsports »

Ill update tomorrow with needed jumper for vss
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Kristian
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Re: Hellen64 revb 91Miata VSS

Post by Kristian »

Thanks
1991 1.6 Mazda Eunos Roadster, 5sp, Normally Aspirated
BeerMoneyMotorsports
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Re: Hellen64 revb 91Miata VSS

Post by BeerMoneyMotorsports »

Sorry for the delay. Remove r20 and jumper to p33. VSS circuit already has the pullup, so r23 can be completely bypassed.
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Kristian
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Re: Hellen64 revb 91Miata VSS

Post by Kristian »

thanks
1991 1.6 Mazda Eunos Roadster, 5sp, Normally Aspirated
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