Renault Laguna II - Phase 1 - Wheels and Tyres - Tyre Pressure Sensors - Member experiences and solution - Page 75 - Renault Forums :: Independent Renault forum

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post #371 of 560 (permalink) Old 24th August 2008
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If it's the UCH fuse that you remove,then I suspect it's just a case that the unit resets it's self and the pressure sensors start working.The UCH 's are a little temperamental at the best of times.

If you have the radio code,try disconnecting the battery and leaving the car for a few hours.I suspect that when you connect it up again it will have the same effect as removing the fuse.

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post #372 of 560 (permalink) Old 25th August 2008
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Thanks for your advice madnoel10 and Lagdti, I tried to combine your ideas. I cleaned the connections, both in the unit under the car near the left passenger footwell and the one in the left rear wheel housing (allthough the black boxes were grubby all connections looked like new) after using electrical cleaner, re-sealed and replaced them. I also disconnected battery overnight - same effect! So when I drove it, all four wheels on display - no warnings, then after 3 miles all four wheels disappear together - back to square one.
Compared with gearboxes and blown engines its a small problem but whilst I was tinkering, if it was fixable I'd give it a go because its been bugging me. But I've probably spent too much time on this problem (or so my wife says - bank holiday weekend etc.)
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post #373 of 560 (permalink) Old 25th August 2008
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Te fact that it improved seems you are on the right track - it coulkd be water has got inside the receiver. You could try taking it of and drying it out to see if it helps.
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post #374 of 560 (permalink) Old 25th August 2008
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tyre pressure sensor

I had a close look at the sensor and basically it's a resin filled a plastic job.

when i get a new one in the next few months I'll have a go at melting the resin out and see what happens
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post #375 of 560 (permalink) Old 26th August 2008
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I'd recommend using a soldering iron to do that, as you want the heat localised around the battery. Also, if it is possible to change the battery, the resin would would need to be replaced so that the battery wasn't dislodged by the centrifugal forces whilst the wheel's in motion.

(I realise that you won't actually be re-using this sensor, but it would be good to approach dismantling it as if you were).

Best of luck.


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