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Attesa Only Works When Warm


Chris32R
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Hey guys,

Got a bit of a drama with the attesa system in my r32 GTR.

The 4wd pump only begins to work after 20 minutes of driving. Once the car is warm it will work and continue to work even after the car has been turned off and back on again, even after periods longer than an hour.

Does anyone know what the problem could be or any tests I could perform to diagnose the fault?

Thanks

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Cheers for the reply.

I have checked the ecu and there is no flash codes coming from it. I've tried replacing the ecu with a known working spare that I had laying around and it didn't fix the problem.

I've bled the system and theres definitely no air in it.

I had to drive the car for 20 minutes prior to doing the bleed just so that the pump would work when I unplugged the connector, that runs the pump, to perform the bleed.

If I unplugged the bleed connector when the car is cold, the pump does not run.

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