Jump to content
SAU Community

Recommended Posts

Jeff,

I followed your tutorial and my voltages are way off even after adjustment. I got 2.45, 2.6, and a pot that cant go past 1.9. The electronics store I have on island (Okinawa, JP) doesn't have the pots so I'm kinda stuck. Here's where my real question comes in....I didn't get the 4WD light on until I was removing tint from my back window (also turning my car off and on occasionally for some background music). Is it possible that I just smashed on a wire somewhere around the back seats and broke it that way? I am getting error code 13 which to me sounds like it has a connection to the sensor but still it hangs in the back of my mind about looking in the wrong place. I'm interested in buying a completely electronic system like the one you're making and there is another one built and currently being tested over Here

Hey - I guess it's possible that a wire got broken - but with the voltages you have I would expect and error code 13... Sounds to me like the sensor is buggered - but I could be wrong....

Jeff

  • 3 weeks later...

I've also modified the standard G sensor to fix the shit handling of stock R32 GTRs as first described by our mate Mr Edgar in this excellent article:

http://autospeed.com.au/cms/title_Godzilla-Tamed-/A_107753/article.html

I pulled apart the G sensor, drew a circuit diagram and went from there.

By increasing the bias to the front, my comments are the same as Julian's - the car is now a frighteningly quick, this mod alone is better than every other modification I've done to the car combined!

At Sandown, go slow into any corner and put the foot down hard as you begin any turn - the car now stays glued to the track, no power oversteer at all. Too much front bias and it understeers a little under power, set it to your cars configuration and its just magic, the car is so much faster through and out of corners.... My top speed is about 20-25km/h faster down both straights after this mod :)

I'll post what to do and photos soon.... I need to do a permanent install in my car, currently i've just got a wire coming out under the center console, soldered to a potentiometer.... looks nasty but works awesome as I was developing it. The mod is extremely simple - drill a hole in the top of the G sensor housing to run a two wires through and connect the two wires to a pot to adjust front bias.

  • 1 month later...

I borrowed the picture and translated this to Swedish for the swedish Skylines. This worked like a treat! my problem was that one of the transistors had a small leak, and the problem was the leak as it interuppted the the other pins.

  • 6 months later...
  • 7 months later...

Guys just been reading this can anyone assist with the following results:

Pin 6 gives max 0.25V

Pin 5 gives min 2.79V (goes to 5v)

Pin 2 gives min 3.17V (goes to 5v)

Just getting too little and too much volts.

Which components would need changing?

Any comments most welcome

When you say "goes to 5v" what do you mean ?

Your pin 6 reading suggest either a bent pendulum or buggered hall effect sensors. It is possible to sort of make it work. But in my opinion I think it would be better to find a new / replacement one.

If you go all out and replace stuff it will work sum what, but the response from the 4WD system will be unpredictable. ie. Will come on too late, too early, too fast, or too slow...or the wrong amount of bias.

Jeff

Jeff

The voltages at pins 5 and 2 actually go up to 5V, the minimum possible by adjusting the pot are 2.79V and 3.17V respectively.

Yet at pin 6 the maximum possible is only 0.25V it goes all the way down to 0V when adjusting the pot for this one.

Cant fork out for a replacement one, would rather fix this if its possible...

  • 1 month later...

Jeff

The voltages at pins 5 and 2 actually go up to 5V, the minimum possible by adjusting the pot are 2.79V and 3.17V respectively.

Yet at pin 6 the maximum possible is only 0.25V it goes all the way down to 0V when adjusting the pot for this one.

Cant fork out for a replacement one, would rather fix this if its possible...

Have a close look at the caps, even if one is just slightly bulging on its lid is a hint that its on its last legs, any leakage and its 100% gone.

Last resort if your stuck and unsure is unsolder a leg off one cap and check the voltages, if you lost voltage on one that was working before solder it back on till you find the cap that relates to that voltage your missing, when you have worked out which cap it is try other new cap, they are cheap as chips.

Jeff

The voltages at pins 5 and 2 actually go up to 5V, the minimum possible by adjusting the pot are 2.79V and 3.17V respectively.

Yet at pin 6 the maximum possible is only 0.25V it goes all the way down to 0V when adjusting the pot for this one.

Cant fork out for a replacement one, would rather fix this if its possible...

Sorry missed this. Based off these voltages i'm guessing the G sensor is too far gone to fix. As mentioned above, try the caps as they only cost almost nothing, but I'm guessing a new G sensor is in order....

  • 1 month later...

I've got a R32 G senor i'm planning to use in a 2wd race car, jsut to check lateral G and to help detemrine the effect of various suspension/tyre changes.

can anyone explain how a sensor gets to display 'red" in the window?

does anyone have a complete pin-out diagram for this sensor. i cant find what i want with over an hour of google searching

thanks

can anyone explain how a sensor gets to display 'red" in the window?

well I know rolling the car 7 times into a gully will do it.

the indicator is not connected to the sensor in any way (well except the glue that holds it on). It just breaks and goes red when it has a large impact because it is likely the g sensor will also have been damaged.

BTW there are probably cheaper ways to get a g sensor, most logging systems/dashes have them already integrated. If you use the standard one you will need to connect to it and calibrate it. Also, RWD or not, you probably want both lateral and longitudinal sensors

  • 1 year later...

Hi Jeff,

Great explanations!

We've got an R32 GTR in Adelaide and we believe we have the same symptoms, ABS & AWD lights on w/ codes 11 & 13.

We've tried to adjust the pots but no success. All three go up to about 1.2v and then drop to zero.

Would you please help us out?

Thanks mate.

Hey,

Yeah sounds like the G-Sensor is the problem. Unfortunately it sounds like your sensor might be beyond repair :-( I have tried to repair sensors like yours in the past, but haven't had much luck. You can get them to stop throwing error codes on level ground, but the sensor characteristics are just awful. (ie Will engage front wheels at the slightest touch of the throttle, etc etc etc)

I would say a new sensor might be the best way to go.

Sorry I can't help more here. Wish I finished the little PCB replacement for the R32 I was working on. Twin babies seem to have gotten in the way of car projects....

Jeff

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...