StuartTheFish

How've you got on with trying conZult by the way? Just looked, and there's a download section on http://www.conzult.com.

This section of the workshop manual suggests it only generates one signal, since the only check it says you can do is see if the voltage fluctuates as you rotate the pinion. Which it will be doing for your speedo to function. I still think it's a wiring problem since you've tried everything else.

Only if it generates two individual signals. If it does, it'd be covered in the relevant section of the workshop manual for testing the sensor. I'll have a look later on to see if I can confirm.

Easy then, cheers. Saves me buying the wheel buttons and finding somewhere for them to go if there's a stalk available anyway. :)

Does it have to be a late spec car for that to fit?

Yeah, on Google mate. It'll surely be on it's own website. :)

That would only be possible if the sensor generates two separate signals at different frequencies down the same wires, otherwise it'd need to be two separate circuits, one to the clocks, and the other to the control units. But if that was the case then converter chips wouldn't be able to trick the ecu to change the speed limiter. I'm happy to be proved wrong of course if it turns out to be that, but I'm not convinced from previous experience with Nissan speedometers.

Not sure if the cars new enough to have an airbag wheel even came with cruise control, unless it was an optional extra still. In short, don't know.

Maybe try using different software, the free version of conZult should do.

Wouldn't mind seeing how they get relocated to the steering column cowl though, does anyone have any pictures?

Yeah, that switch is what turns the cruise control on or off in the first place, and you then control it with the buttons on the wheel.

Because I don't have a slot for them, and I can't personally make as neat a hole as Nissan made for the dimmer buttons. So I'm hoping they're the same size. Haven't checked yet though, not got the car at the moment since it's getting the body repaired. I also don't have the cruise control buttons on the wheel anyway, since it's got an aftermarket one.

I'm thinking of putting them in place of the cluster dimmer buttons in the right pod, it looks to be a similar sized hole.

Awesome link, thanks.

Surely the speedo wouldn't even work if it was the sensor at fault?

Not, not now. :)

The only thing I'm not sure about is if the signal is split after the clocks and goes to both the ecu and hicas individually, or if it passes from one unit to the other. I've never had to find out, and my car is currently in the bodyshop so I can't confirm it for you. It's a shame you're now closer.

It's either the clocks, ecu/hicas control unit, or the wiring. There's nothing else it can be, given your speedo actually works, suggesting the speed sensor is okay.

That's due to the absence of a speed signal. The hicas control unit changes voltage to the power steering solenoid on the rack based on what speed the car is travelling. If it thinks it's parked, it supplies full assistance by opening the valve. The faster you go, the more closed it goes, restricting fluid flow through the rack. In your case, that isn't happening since there's no speed signal, so after a while it's dropping into failsafe mode, where it supplies barely any assistance since it'd be safer than full assistance while going at speed.

Harrogate fella, north Yorkshire. Can't remember if you said before where you are or not.

Like I've said before, the steering angle sensor on the rack is nothing at all to do with the speed signal. If that was faulty, you'd have a hicas error code telling you so. Surprised to hear that you couldn't get a speed signal on another car too though, what lead are you using? My offer still stands if you want me to have a look.

Even if the speed signal was wrong, there's still a speed signal. All it would do is behave differently depending on what speed it thinks the car is travelling at.

No mate, the ecu doesn't dictate the measurement of speed, it simply interprets what it's told by the clocks.

Let me know how you get on fella. :)

That's as I understand it too. From the sensor to the cluster, from the cluster to the various control units. The steering angle sensor has nothing to do with the speed sensor. If it was mine, I'd do things the same as I've told you on here. Start with consult to see if there's a speed signal. In your case there isn't, yet the speedo works. So then I'd try checking for continuity from the clocks to the hicas control unit, which you have. I'd try another set of clocks, but again you have. So I don't know really, borrow someone else's hicas ecu to make sure it's not just the control unit at fault? I've got one sat in my car which is currently off the road if you wanted to try it.