Attessa 4wd Troubleshooting

[Vanilla_Rice]

My GTS4 4wd is playing up. Can anyone help me please.

So far I have done the following to try and diagnose whats wrong.

I have jacked the rear wheels off the ground and slowly dropped the clutch to see if the front wheels try to move. They didnt move at all, had the rears spinning quite fast and no action front front what-so-ever.

The 4WD light on the dash is not coming on when I start the car, and never comes on at all for that matter.

I just checked the attessa ecu and I get 21 flashes, and then repeats.

looking at this link: http://www.sussexjapclub.com/nissan-attess...des-vt2810.html

21: Throttle sensor or circuit

Anyone know how to interpret this? or how I can fix it?

Edited May 18, 2009 by Vanilla_Rice

[djr81]

Remove the tps sensor, give it a clean & replace it. If that fails try swapping out the sensor with a known good one.

Is there a globe in the dashboard for the fault light?

[2LV8ETR]

Sorry man, I don't want to state the obvious but did you check the fuse in the engine bay?

[Vanilla_Rice]

Remove the tps sensor, give it a clean & replace it. If that fails try swapping out the sensor with a known good one.

Well i didnt remove it (yet) but I disconnected the plug and used to multimeter to test it. At 0 throttle it sits at zero ohms then when I open the throttle it starts to increase resistance and then goes open circuit almost straight away.. I open the throttle almost the whole way and it read 18ohms for about half a second then goes open circuit again.

Is there a globe in the dashboard for the fault light?

do you mean is there a bulb in the dash for 4wd? I dont know what you mean by globe sorry.

[djr81]

Well i didnt remove it (yet) but I disconnected the plug and used to multimeter to test it. At 0 throttle it sits at zero ohms then when I open the throttle it starts to increase resistance and then goes open circuit almost straight away.. I open the throttle almost the whole way and it read 18ohms for about half a second then goes open circuit again.

do you mean is there a bulb in the dash for 4wd? I dont know what you mean by globe sorry.

Bulb = globe.

So without me going to check does the TPS check out as the manual says it should?

[Vanilla_Rice]

Sorry man, I don't want to state the obvious but did you check the fuse in the engine bay?

Yeah I'm messing around with that fuse alot lately, its not blown and I'm sure it works because I can hear something like the "attessa primer"?? when ever the fuse is plugged in, so I'm pritty sure the fuse is doing its job. I know in the past (when my 4wd used to work) I used a fuse I bought from a gas station but that didnt work for some reason, had to source this fuse from a nissan wrecker.

[Vanilla_Rice]

I dont have a manual and I lost my copy I had on this computer.

But this link is quite helpful: http://www.skylinesdownunder.com/forums/sh...hlight=tps+test

I think I was looking at the idle contacts, hence the weird readings

I found the other connector disconnected, which id imagine is the variable resistor one but cant see what it connects to.

http://img33.imageshack.us/img33/5897/57520046.jpg

Edited May 18, 2009 by Vanilla_Rice

[mitch32]

I'm having the same issue on my 32GTR, have you figured your issue out yet?

[Vanilla_Rice]

not yet mitch but I've been trying.

Can anyone tell me the path the rear loom takes to give tps signals to the attessa. I've checked the passengers side footwell but cant see the wires I'm after.

Also, does anyone know if GTS4's use an ECCS control unit the same as the r32 gtr's do? If they do, where is it?

cheers.

[Vanilla_Rice]

Also, does anyone know if GTS4's use an ECCS control unit the same as the r32 gtr's do? If they do, where is it?

never mind I didnt realise ECCS was the same thing as stock ECU

Edited June 22, 2009 by Vanilla_Rice