tegwin
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| posted on 15/12/12 at 02:13 PM |
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Tin top crank case breather heater element fault
After getting all kinds of weird error codes on my polo and an annoying blowing fuse I finally managed to track down the cause of the fault. Oddly the
two components that the error codes pointed to were not at fault.
The culprit turns out to be a little heater on the breather pipe from the crankcase up to the airbox.
Is a small thing, only fed from a 5A fuse so not sure how much heating it will actually be able to do.
It is almost a total short to earth so is knackered...
Anyone know what its purpose is? Should I pay VW the asking price and fit a new one or just electronically disconnect the faulty one and leave it
be!?
The heater was blocked up with mineral deposits and a bit of maiyonaisy gunky.... I also seem to be getting a bit of oil inside the airbox.....
presumably from the breather. (don't seem to burn a noticeable amount of oil over 5000 miles)
Seems a daft feature given that it is sat right next to to a giant, red hot piece of metal (IE the engine)
Any thoughts from the knowledgeable folk here?
[Edited on 15/12/12 by tegwin]
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britishtrident
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| posted on 15/12/12 at 03:11 PM |
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Put a 40 ohm resistor in the circuit and see if it clears the codes.
VW these days seems to have a fixation with making systems as complex as possible.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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rusty nuts
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| posted on 15/12/12 at 03:55 PM |
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Error codes only tell you the effect of a faulty component not the cause For example I've recently had a Ford Ranger with the code PO 093 which
comes up as "fuel leak detected-- major leak " possible cause fuel leak, fuel pressure sensor/wiring fault. No leak was found, pressure
sensor and wiring checked out OK but changing the fuel filter seems to have rectified the fault . Look for the cause of the problem , not the effect.
Cleaning the breather and throttle body may help . Suspect the heater may be to help crankcase fumes to be burnt off easily?
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tegwin
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| posted on 15/12/12 at 04:42 PM |
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Fault is definitely the breather heater.
Have made it electrically safe and re-assembled the car. No more blown fuses...
Will see how much VW want for a new one..... rather tempted to just leave it as is now though.
To be fair the two apparently un-related fault codes did lead us to the actual issue as it helped pintpoint the part of the loom/system that was at
fault.
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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