Error Codes - 33gtr

[GTR01V]

Jus wanted to say hi as i'm only new to the site. I own a R33 GTR and live in Wagga NSW.

I'm not sure if I'm posting this in the right forum as I haven't checked out the site fully yet but I've got a question that i need some help with.

My car has the 4WD & ABS light illuminated on the dash as soon as i start the car. After a few diagnostics my mechanic came up with 3 trouble codes. They were:

1. Deceleration sensor 1

2. Deceleration sensor 2

3. Deceleration sensors 1 &2.

He went on to tell me that he got rid of the first 2 codes but could not clear the 3rd one. As the import scene is not huge here we are now stuck with this problem that nobody knows anything about. I went to an auto electrician and his words were go and get as much info as you can and come back to me. So my question to you guys is has this happened to anyone before? Is there anywhere I can download wiring diagrams and maybe a service manual?

Any help would be appreciated!

Cheers