If what I've found is accurate, the speedometer itself takes the VSS AC signal and converts it to a DC output that is then sent to 3 other components. The receiving components are ECCS (ECU), Power Steering and Cruise Control. So the ECU itself does not tell the Power Steering Control Unit to adjust the amount of assist.
At the moment I am attempting to confirm what type of output the speedometer is sending. Some search results state its a frequency output of 2Hz - 120Hz, others listed it as a PWM ranging from 0v to 5v, and all of them agree its DC.
I'm still digging through related posts on the forum here as well, though a lot of links on older posts are dead.
By
Silver ·
hi im new to forums and im new to the 300zx scene.
i have wanted one for years but have 4 children.
i have recently been able to afford one as i need ti have a family car as well as the new toy.
Im having a few problems tho its a 1990 twin T (auto)
when i accelerate the boost gage goes right up to 7 then drops right back down with no real kick.
the engine doesnt smoke and makes no tapping noises nor overheats
i suspect turbo or vacuum problems as other than this the car drives fine just slower than my 2.0 red top astra :(
any ideas would be apreciated ( already ordered a usb consult cable with software
ta
Rob