R32 GTR abs and 4wd lights stay on

[Joel_Boisvert]

Hey everyone, I know this isn't a new topic but I'm fairly new to the Skyline game and I haven't been able to find a solution in other posts. I have a 1990 R32 GTR and both the ABS and 4WD lights come on right away when turning the car on. They do not go away until the car is turned off. The Attessa ecu isn't showing any codes, the fluid level is perfect with no air bubbles in the reservoir, and the fuses are fine. I've been losing sleep over this. It worked when I got the car a year ago. Just looking for guidance at this point. Thanks in advance!

[hotz]

Have u checked the number of flashes from the ecu in the boot? If both lights are on in the dashboard, you should see some flashes. 

[Hadouken]

When are you checking the code?

[Hadouken]

.

 

 

[blind_elk]

GTRs are notoriously sensitive to voltage. Even if the car can start on the battery, the ECUs might be seeing high charge rates necessary to replenish the battery after starting as some sort of error.

Get a new battery.

[niZmO_Man]

As above, start by changing the battery terminals (if they're factory crappy ones), clean up all the contacts, change the earth strap and clean up the attachment points (one on the body near the battery, one on the engine block).

Then I'd look at the ATTESA computer, open it up and see if the boards are burnt. Check the voltages at the plugs (wiring diagram would be handy) as well when the car is running.

[Joel_Boisvert]

Thanks guys, I forgot to mention that I have checked the ecu in the boot, there are no codes flashing. I'll try the battery and let you know if that fixes it.

Sent from my SM-G900V using SAU Community mobile app

[niZmO_Man]

My ATTESA/ABS craps out randomly, one rear wheel speed sensor (from the ATTESA computer code flashing). Never got around to changing it.

[Joel_Boisvert]

Okay so quick update. Changed the battery and cleaned up the terminals and connections and there was no change. Really scratching my head on this one haha

[Scott Black]

Have you checked the 4wd fuse In the engine bay

[GT-R David]

the fluid level is perfect with no air bubbles in the reservoir

What does that mean? Air will be in the hoses, not in the reservoir.
Bleed it as stated in the workshop manual first.

[Joel_Boisvert]

Have you checked the 4wd fuse In the engine bay

I myself have wondered about this. I have taken a quick look at it but I couldn't figure out how to check if it was bad or not. I assume I'll need to check the continuity on the little prongs but also if it is bad, idk where to get those fuses. I've never seen ones like that before. I'll have to do some digging.

[Hadouken]

Judging from your knowledge I advise you take it to someone who knows about gtrs.

[I gotta R34gtr v-spec]

Take the lid off the ecu and see if there's any fluid leaking out of the capacitors or what ever they are,they are 30 years old and start to leak fluid.took mine to the local tv tech and he replaced the leaking ones .problem fixed.