Yet another 4WS thread

Post by **Vtecmec** » Sun Mar 18, 2018 4:31 pm

I was able to do the electronic neutral check with an error code, have you tried to do it?

no0ne · Post by **no0ne** » Sun Mar 18, 2018 8:33 pm

Yeah, sensor should give 0-5 0-5 0-5 volts in a and b phases. Find another main sensor, in 2015 i've bought it for 10pounds from this forum.

Anzezaf · Post by **Anzezaf** » Mon Mar 19, 2018 7:36 am

Vtecmec wrote:I was able to do the electronic neutral check with an error code, have you tried to do it?

Didn't even try, no.. I think i'm going to remove the steering wheel and have a look at the sensor. Maybe if it moved from its position / somehow isn't aligned, I hope i can fix it.

no0ne wrote:Yeah, sensor should give 0-5 0-5 0-5 volts in a and b phases. Find another main sensor, in 2015 i've bought it for 10pounds from this forum.

Yeah well.. I hope i can even find it

I'm writing like crazy to every ebay seller (and similar sites). Please, if you have any 4ws 5th gen preludes in your country or russia, let me know if maybe us two can make a deal

no0ne · Post by **no0ne** » Mon Mar 19, 2018 8:38 am

I've given away my old sensor (which now i know was fine) to my friend. I can ask if he will be using it in the future.

MikeK · Post by **MikeK** » Mon Mar 19, 2018 1:33 pm

Have you tried these adverts ?

https://www.gumtree.com/p/car-replaceme ... 1289405461

https://www.gumtree.com/e/honda-prelude ... 104562%7C0

All the best,

Post by **Vtecmec** » Mon Mar 19, 2018 6:34 pm

Seriously, do the electronic alignment check. You're stabbing in the dark until you do.

AeroNotix · Post by **AeroNotix** » Tue Mar 20, 2018 9:51 pm

Which sensor do you need? I have spares of the main steering angle sensor (steering wheel), the main rear sensor and an entire 4ws unit minus the auxiliary rear sensor.

IMHO using a multimeter for this if you're new to electronics and signal testing will confuse you. They are very specific waveforms that signal to the ECU what to do. You're better off finding an oscilloscope and seeing what happens when you turn the steering wheel / rear wheels.

Did you get an alignment? It's necessary to first do a mechanical alignment before doing an electronic neutral alignment.

You can clear error codes without performing the 4ws reset dance. Taking the 4ws fuse out for a bit (10 or so minutes?) should clear it. So even if the steering wheel angle sensor is goosed the codes can STILL be reset, don't worry about that.

Soldering the relays on the ECU is a 4th gen fix. I tried it when mine was playing up hoping it would apply but it seems to be an issue with the 4th gen 4ws ECU rather than the 5th gen ones.

Anzezaf · Post by **Anzezaf** » Wed Mar 21, 2018 6:20 am

It now seems I will need the front main one, behind the steering wheel.

I'm an electrical engineer, so multimeter is my best friend - like a dog

Don't have an oscilloscope though...

Getting an alignment by itself is more of a project than not.. Not many mechanics and dealers have that 4WS pin.. Although I know of a guy 50km away from me that has it and I will go to him when i decide for the alignment

OK, thanks for the fuse reset tip, I will try it soon and report back

Post by **simonc** » Wed Mar 21, 2018 8:12 am

Two things about this fantastic thread. First, I don't understand 95% of what you guys are talking about, but more importantly, the sheer dedication you brought to this task Anzezaf, is incredible. I'm giving you a rep thing for your commitment and bloody hard work. This thread (although a bit technical for idiots like me) is really quite interesting. Good for you, fella.

Post by **Vtecmec** » Wed Mar 21, 2018 10:00 am

AeroNotix wrote: Did you get an alignment? It's necessary to first do a mechanical alignment before doing an electronic neutral alignment.

Other way round mate, get the car aligned electronically, then align the car mechanically to match.