Attessa Fault Code 5 And 7?

[a20089]

I have a R33 GTR which displays the AWD and A-LSD warning lights. The 4wd is not functioning so the errors seems correct.

The computer at the rear flashes 7 slow then 5 fast, this seems to be

1,5 Front right wheel sensor and circuit

3,7 Rear right wheel sensor and circuit

Reference: http://tyndago.googlepages.com/gt-rattesainfrormation

The error started happening intermittently at first, now it occurs every time I start the car. If I engage the starter motor before the fuel pump has finished I often get the ABS warning light to appear as well.

I have topped up the Reservoir in the boot to a little over full when ignition is on, no change.

I have changed green 30A fuses around in the boot to no success and both looked good.

I know I can bleed the system but the error codes do not seem to say this is the problem.

Where else do people think I should look?

[blind_elk]

ATTESSA uses the ABS sensors - that is where the fault is.

[a20089]

ATTESSA uses the ABS sensors - that is where the fault is.

Thanks, that sounds logical. Any hints on how to check and where they are located?