4wd Light, Tps Low Voltage

[mitch32]

Hello,

I had my idle valve gasket replaced and the idle reset by a mechanic to get rid of the high idle on my R32 GTR. Now my 4wd is lighting up on the dash and I'm getting a code 21 on the Attessa, which is a TPS error. I haven't checked the voltage (simply I'm not sure the correct way to check it, I'll probably just disconnect the harness to the Attessa Unit in the boot and check the car with the engine off but ignition on). Today I tried to run the car with my foot resting on the throttle (lightly), hench making the voltage on the TPS higher and my 4wd light never came on and the 4wd was working perfectly. So I'm almost 100% certain the TPS voltage is low. Now my new problem is that I'm unsure how to adjust it to be at the right voltage. Can someone point me in the right direction?

Thanks

Mitch

[Swiper the Fox]

just rotate the tps by loosening the mounting screws till it outputs 0.4v with the throttle closed. This is the voltage the ATTESSA is looking for on start-up.

[mitch32]

I tested it tonight by probing (with a sewing needle) into the TPS's harness. I tapped into the middle wire and grounded onto the battery and got a voltage of 0.52V, the manual says approx 0.5V so I should be good. The 4wd light didn't come on when I drove the car (only drove it 2 minutes).

My plan is tomorrow when driving it if the light come on to probe the TPS again and the Attessa-Ets unit in the boot and see if I get the correct voltage. Then I can rule out the TPS sensor and then either my harness is bad or Attessa or the ECCS have gone bad. In the manual it says the Attessa-ETS is supposed to have 0.4V at idle and the ECCS is supposed to have 0.375V. So I'll tests those.

[Vanilla_Rice]

yeah i noticed your having similar problems to me, where is the ECCS? is it under the parcel tray like the attessa ecu is?

[Vanilla_Rice]

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