Adjust voltage on r33 GTST Active LSD G sensor POTS? (2.5v)

[jacobzking]

When I bought the car (93 R33 GTST w/ Active LSD), the active LSD light has been on the dash all the time.  

I get codes 62 (FR and RR G sensor 2 and circuit).  65 G Sensor 2 Power Supply and circuit.  66 Side G sensor and Circuit.  

I ran through the flow chart (thank you Josh) and got the appropriate 8V at the 2 pins on the G sensor connector (pins 27-29).  At that point, according to Nissan, needs a new G sensor.  Ive tried 3 different sensors, but what are the chances all 3 are bad?  I'm hoping I can adjust voltage per the guys R32 GTRs recommendation and get em working.  I just dont know what 2 places to check voltage when adjusting the POTS.  Thanks!!!

 

 

[joshuaho96]

On 9/16/2023 at 1:40 PM, jacobzking said:

When I bought the car (93 R33 GTST w/ Active LSD), the active LSD light has been on the dash all the time.  

I get codes 62 (FR and RR G sensor 2 and circuit).  65 G Sensor 2 Power Supply and circuit.  66 Side G sensor and Circuit.  

I ran through the flow chart (thank you Josh) and got the appropriate 8V at the 2 pins on the G sensor connector (pins 27-29).  At that point, according to Nissan, needs a new G sensor.  Ive tried 3 different sensors, but what are the chances all 3 are bad?  I'm hoping I can adjust voltage per the guys R32 GTRs recommendation and get em working.  I just dont know what 2 places to check voltage when adjusting the POTS.  Thanks!!!

 

 

To do it right means pulling apart the whole sensor and rebuilding it. It's much easier to just buy an R33 GTR digital g-sensor and only use the one plug that fits. The sensors are almost identical anyways, it looks like the bracket is pretty much the same between the R33 GTR and GTST with A-LSD. I would probably go for the Midori Seibi one because it looks to have a cleaner design and I don't really need a bunch of DIP switches to change the g-sensor response from stock.

If you really insist on trying to fix the sensors you have you can look at this for reference: https://www.gtrusablog.com/2012/02/digital-g-sensor-for-nissan-skyline-gt.html

You can see the pendulum mechanism I'm talking about. It's attached to the circuit board underneath with ribbon cables. To fully refurbish the ones you have you probably need to replace the springs with whatever the factory spec was, then replace the pots as well or at least clean them of any debris. I don't know if it's actually designed to make this simple, it's not unusual for repairs of this nature to be a big pain in the neck which is why the FSM just says toss the sensor and order a new one.

Edited September 22, 2023 by joshuaho96

[jacobzking]

On 9/21/2023 at 9:14 PM, joshuaho96 said:

To do it right means pulling apart the whole sensor and rebuilding it. It's much easier to just buy an R33 GTR digital g-sensor and only use the one plug that fits. The sensors are almost identical anyways, it looks like the bracket is pretty much the same between the R33 GTR and GTST with A-LSD. I would probably go for the Midori Seibi one because it looks to have a cleaner design and I don't really need a bunch of DIP switches to change the g-sensor response from stock.

If you really insist on trying to fix the sensors you have you can look at this for reference: https://www.gtrusablog.com/2012/02/digital-g-sensor-for-nissan-skyline-gt.html

You can see the pendulum mechanism I'm talking about. It's attached to the circuit board underneath with ribbon cables. To fully refurbish the ones you have you probably need to replace the springs with whatever the factory spec was, then replace the pots as well or at least clean them of any debris. I don't know if it's actually designed to make this simple, it's not unusual for repairs of this nature to be a big pain in the neck which is why the FSM just says toss the sensor and order a new one.

I'm ASSUMING the Midori sensor will work in a GTST.. I'll give it a try and report back.

[joshuaho96]

14 hours ago, jacobzking said:

I'm ASSUMING the Midori sensor will work in a GTST.. I'll give it a try and report back.

Good luck. I stared at the GTST OEM sensor/bracket and then the Midori sensor and couldn't see why it wouldn't work but I have never torn apart the R33 center storage to see how it all fits up.