XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

air pump issue

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Old 09-09-2011, 09:30 PM
gabbycat's Avatar
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Default air pump issue

Hi all:

My wife's car is a 95 2+2 convertible with the AJ16 motor. Tonight as we came up the driveway we heard this light hum from an electrical motor working. At first I thought it was an auxilary fan working to cool the car as she had just arrived but it kept working. After 5 minutes or so I popped the hood and found the air pump still running. I unplugged the pump, it stopped, then pugged it back in, it started back up. After another 15 minutes while I search the forums to ascertain what it was I went out and unplugged it for good as I don't want it to deplete the battery.

Is there a thermo switch that controlls this pump thats gone bad?

Thanks all
 
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Old 09-09-2011, 09:37 PM
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You may want to see if the relay is shorted, it is in the row under the hood on the left side. I am sorry but I forgot which one it is but it may be the rear one in the row on the left side, they are blue.
 
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Old 09-09-2011, 09:48 PM
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The Electrolux air pump is operated by the ECM for a short period 2 times during cold start. It should not operate after that. The power relay for the air pump might be faulty keeping the pump running. There was a newer pump and fuse upgrade (25 amp to 30 amp) and a TSB for your car. The system is the same as the X300.

Here is some info but you need to get 10 Posts and 3 days to download.

bob gauff
 
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Old 09-10-2011, 06:58 AM
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Originally Posted by Jaxkr
You may want to see if the relay is shorted, it is in the row under the hood on the left side. I am sorry but I forgot which one it is but it may be the rear one in the row on the left side, they are blue.
When I bought the car 3 years ago I replaced every relay under the hood and for the top but I will check and see.
Thanks.
 
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