Code 75

it's been a slower couple of months lately with a few minor events here and there. Chief among them was a ATTESA error code 75. However more on that later.

First off though I noticed the power steering line from the reservior to down to the motor was cracked and bleading abit so took it in to change and after Konishi-san of Best-R looked at it he also found the lower hose by the steering rack was also cracking so that also was changed.

I initially was planning to change out the entire assembly including the largest part which mostly is comprised of metal piping. However this would require the removal of alot of components off the engine so we decided to skip it for now and leave it for a later date.

As the fitting of the hoses requires the turbo intake piping to be removed Konishi-san noticed a decent amount of blow by oil in the turbos and he said I'd clearly been hitting up Hakone often lately with a smile. He then recommended I consider a blow by management solution.

There are many aftermarket solutions to choose from, some illegal as they vent to atmosphere. I considered a few different options. In the end I decided on the more pricy but integrated and cleaner Nismo oil separator kit (Part No: 11830-RSR45) rather than a catch can. A catch can doesn't return the oil to the sump however a oil separator condenses the oil in a can but then returns this oil to the turbo.



Yes this is a less effective solution that a full catch can setup however to avoid possible headaches come inspection time I decided to go for this solution. Not to mention the cleaner look without the tubes running the length of the engine bay.


Then upon one of my Hakone runs on the way I noticed the A-LSD and 4WD lights on the instrument cluster had turned on.
This means the car is running in RWD mode due to some error linked to the ATTESA ETS system.
This was a something that did happen in the once or twice a year in the last few years but it would reset if I restarted the engine.

However this time it wouldn't go away. So a visit to the workshop was in order. When I arrived at Best-R with the above lights on Konishi-san told me to keep the engine running and then proceeded to run off to the garage and return with a mirror and opened the boot and held the mirror under the ATTESA control unit to reveal a red flashing LED on the underside of the unit. He then counted off the flashing sequences of fast and slow flahses which cycle continuously. Seven and five flashes we counted.

This is a trick of the trade for diagnosing ATTESA related error codes when you don't have a Consult handy (Best-R's Consult was out of action that day). He then took out his ATTESA handbook and looked up the error code 75 (as there was no 57). which pointed to a throttle position sensor error which was causing the ATTESA to disable itself. As we know throttle imput is one of the readings the ATESSA ETS computer takes when splitting torque.


The initial plan was to replace the throttle position sensor however after leaving my car with Konishi-san for 1 week he found the throttle sensor was checking out fine. So unsure we decided to keep the car for a further week to do some more investigating.

I then got a call from Konishi-san mid-week saying he found the gremlin of code 75. Turns out the throttle position sensor was slightly out of spec for it's operating voltage range which was causing the 4WD error code.

With the voltage retuned to within the right range my car was ready to pick up along with the oil separator which I also requested fitted while I was there.

 (picture courtesy of Konishi-san and as uploaded to Best-R's Facebook page)
  (picture courtesy of Konishi-san and as uploaded to Best-R's Facebook page)


 (picture courtesy of Konishi-san and as uploaded to Best-R's Facebook page)

While my car was there Konishi-san also discovered the idle control valve was on it's way out which explained the slightly unstable idle at times. But that will be work for another time.

Very happy with the clean, stealth look of the Nismo oil separator.


While my car was in the workshop a package arrived. Some of you who follow Aki's R33 GTR FB page may have seen Ottomobile (a French model car seller which sells officially licenced models) announced earlier this year that they would be releasing a limited production (2000 units) model of the Nismo Omori Factory Grand Touring Car BCNR33 demo car. I had to have this so had placed an order.


Complete with true to original R35 brake kit.

 The model did not disappoint. Nothing opens so it is not up to the standards of Autoart's diecasts (which I own one of). However it is not bad to say the least. not to mention no one else has done the BCNR33 demo car.


One minor gripe perhaps was that the widows were made of a very soft film so that would be one point to take care with.

I really need to stop with model collecting. Although this is the first of my models I have revealed to you guys I have a fair few others which I will reveal at a later date.

So now with the oil separator I can have more piece of mind when driving my car hard with less dirtying of the intake while also reducing the oil comsumption as well.

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