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Cleaning of 850-94 PNP switch 850 1994

posted by  tom 240 on  Sun Oct 12 08:33 CST 2008
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last visit: Wed Jun 17 18:20 CST 2009
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Hi, I have a 850S/NA-94 with 215 kkm.
In the past few years got few times at A1 313=incorrect signal from the gear position sensor (PNP), causing limb-home-mode making the car unusable for my wife.
Thus I now removed the PNP switch, opened it and cleared the contacts with PRF6-68, electronics contact dry cleaner spray, cleaned and lubricated the mechanics with servisol silicone crease there after.
Then I put everything together again without any adjusting problems at all and it seems to work.
It took me 2 hours to take PNP off and again 2 hours to put it back, the cleaner and crease cost practically nothing.
Now I’m exited to see if the 313 pops up again this autumn or do I have few non-problem years ahead, if so then I will repeat this for my 850SW-94 with 267 kkm, which has so far had only once the 313 last autumn.
Br Tapsa







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    Cleaning of 850-94 PNP switch 850 1994

    posted by  KlausC on  Sun Oct 12 09:32 CST 2008
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    last visit: Fri Oct 24 10:15 CST 2014
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    As you noticed, the "grease" inside the PNP had solidified and was no longer making contact and coating the switch. You got lucky, usually the contacts themselves wear out and become unserviceable.
    Now that you have time, find a new back up PNP.

    Klaus
    --
    Just driving a 1998 V70R :)







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