4wd And A-lsd Lights On(bnr34vspec)

[IsaacBNR34Vspec]

Hi everyone,im new here and a helpfull assist would be much appreciated..

I have a BNR34Vspec 2001 and facing a problem tat after my car came to a fullstop,after a few seconds my 4wd and A-LSD lights got turn on..after restarting it again everything went normal and it got turn on again after a few second of fullstop..ive checked the resovoir behind the rear boot and fluid are at the max level..ive been tru and read forums but couldnt find a problem that happenned exactly like mine..

I wish to try solving it myself so is there any idea where i can start from?

Help and assist are most appreciated and pls to meet everyone here since im new here and also new to my car

Cheers everyone!!

[Hadouken]

Read error code off ecu in boot. Report back

[IsaacBNR34Vspec]

I did tried finding the spot to read ecu code behind the boot and ended up clueless where its is..tru reading from forums reading ecu codes from boot isnt it apply only for r32 and r33?

Thanks for the reply Hadouken

[Meathead]

Without knowing what the error code is it is possibly an out of range tps signal to atessa ecu.

Start it again but keep rpm at 1000 for minute .... alsd still lighting up？

[GTSBoy]

If you can't find the attesa computer take the car to a mechanic who had a good scan tool and read the codes from the consult port.

[IsaacBNR34Vspec]

Meathead:u mean after the lights turn on,shut off the and turn on the engine and give it a 1000rpm and see if the lights are on again?ok ill gv it a try by tis evening..if lights still turn on after wat u intruct me to do means theres a TPS failure right?do correct me if im wrong

Thanks for the reply ill update after ive try it out.cheers

[IsaacBNR34Vspec]

GTSboy:thanks for the suggestion,ill keep tat in mind after trying out everything myself and cant fix it,ill go for a scan.cheers

[Meathead]

Meathead:u mean after the lights turn on,shut off the and turn on the engine and give it a 1000rpm and see if the lights are on again?ok ill gv it a try by tis evening..if lights still turn on after wat u intruct me to do means theres a TPS failure right?do correct me if im wrong

Thanks for the reply ill update after ive try it out.cheers

Yeah with the engine switched off start it and keep the rpm 1000 and above for a few minutes and see if the Alsd light is on, if it is not and you let it come back to idle does the Alsd light illuminate after a while again ?

You may have a fluctuating idle that goes below normal and sends a low TPS signal to the Atessa cu which will cause the alarm

TPS signal to Atessa on my r33 gtr vspec is 0.3 - 3.7 v if it falls outside of this it will fault.

You could check the AAC valve (under plenum - 4 bolts and a plug) give it a clean and renew the joint. Idle can be adjusted with the screw.

Lots of AAC cleaning threads here in SAU to help you.

If you are not sure get someone else to do it, preferably a friend as a shop will probably sting!

I am not saying this is your problem but it could be. Might be dirty plugs also causing hunting.

Good Luck!

Edited March 2, 2016 by Meathead

[Hadouken]

How tf is hunting and dirty plugs related to a 4wd light?

[Meathead]

How tf is hunting and dirty plugs related to a 4wd light?[/quote

Hey tf your mouth runs before your brain

You should question other posters in a more civil way.

Tps is directly proportional to rpm which signal inputs to atessa tf

If you could not figure that out then maybe you should just pull your head in tf

[IsaacBNR34Vspec]

Meathead:ive tried as u intructed..like revving above 1000rpm..the lights did not turn on..but as i let go the acceleration my rpm idle show slightly above 1000rpm,is tat a normal?

BTW,wat AAC valve means..?sorry for a noob question..trying to learn as much as i can

Thanks for the reply and point outs..

[IsaacBNR34Vspec]

Oh and btw,the 4wd and a-lsd lights still lighted up

[Hadouken]

Tps I agree with.

Your other suggestions are far fetched.

[Count Grantleyish]

Does it come on when you drive for 1-3 mins within starting up?

[Meathead]

Not the obvious culprits then.

You should seriously see what fault code is coming up, lots of things can trigger this. ie wheel speed sensors for one.

Regarding far fetched - not at all mate Atessa takes rpm signal also and if the rpm signal fluctuates below a certain range say from hunting caused by fouled plugs it will error. \

[GTSBoy]

Would be more likely to have rpm jitter from a f**ked cas than fluffy plugs.

Edited March 3, 2016 by GTSBoy

[IsaacBNR34Vspec]

Count grantleyish:the 4wd and A-LSD comes on whenever the car come into fullstop...i didnt time lap how long it needs to be driven to alarm the lights to go on..as if itll turn on as long as car stop moving and after few seconds..it came on..

[s2d4]

What tyre size are you running? Conditions?

[IsaacBNR34Vspec]

Meathead:yeah,mayb ill take your advise and do a scan just like GTSBoy suggested...but before goin into that i would like to gv a bleed to the attesa system fot any trap air..will update see if this gonna work..cheers everone and thanks

[I gotta R34gtr v-spec]

Do a search for r34 service supplement, and go to section Br page 21 ,hope it helps.

Edited March 3, 2016 by I gotta R34gtr v-spec