Question about after run turbo coolant pump------>
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Question about after run turbo coolant pump------>
Mine runs sometimes at shutdown but not everytime. Volt meter check at wire connector for the pump indicates no voltage when the pump does not run. I thought that the pump ran for a few minutes every time the engine was turned off, but search reveals a few posts that state that after run time is dependant on how hard the engine has been run.
Does anyone know more? There has to be a relay somewhere. I suspect mine is failing.
TIA guys
Does anyone know more? There has to be a relay somewhere. I suspect mine is failing.
TIA guys
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the TT pump runs on a timer, roughly 10 minutes
every time the engine is shut off, or the key's simply tuned on and off.
Other model Audis (some non-turbo's have an after run pump too, my A6 with the 2.8l has one) have used temp sensors to try to determine more precise run time, but I understand they're less reliable than our set up. IIRC the fan control module is in charge of the after run pump. Nine times out of 10, intermittent and/or complete failure of the pump is remedied by replacing the pump. I'm on #3 pump, averaging 70k miles of useful life per pump. My original fan control module is still going.
Other model Audis (some non-turbo's have an after run pump too, my A6 with the 2.8l has one) have used temp sensors to try to determine more precise run time, but I understand they're less reliable than our set up. IIRC the fan control module is in charge of the after run pump. Nine times out of 10, intermittent and/or complete failure of the pump is remedied by replacing the pump. I'm on #3 pump, averaging 70k miles of useful life per pump. My original fan control module is still going.
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Thanks guys for the info----apparently->
I'm the oddball with a control problem rather than a dead pump. I'll do some snooping. Fan control module huh---- I need to apply 12v to the pump via a jumper and make SURE it is good. All I have done so far is look for 12 v at the connector and it was not present.
Picked a fine time, as I ran the heck out of my car at Barber this weekend. I started looking because I smelled antifreeze when I parked after my last couple of runs. I fear the hot turbo with no after run pump may have cooked the hose where it connects. Hope the seals are ok.
Picked a fine time, as I ran the heck out of my car at Barber this weekend. I started looking because I smelled antifreeze when I parked after my last couple of runs. I fear the hot turbo with no after run pump may have cooked the hose where it connects. Hope the seals are ok.
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