Galaxy Parking Sensors

[JimGalaxy]

My parking sensors have stopped working (they are so useful!). Any guidance on fault diagnosis? eg. how to identify which sensor is faulty, or can I do any kind on continuity check on the wiring or the ultrasonic units?

[Tim Baxter]

Check the Fuse?

I'm speculating but probably if one sensor failed I would think that the system shouldn fail as a whole.

Buy a Haynes

[benbrown500]

Hi There, I have just successfully fixed the sensors on my BMW as follows. If you activate the parking sensors (on my car just engage reverse with the ignition on) and then put your ear to each sensor in turn they make a faint ticking noise. On my car the 4 at the rear all ticked as did the central 2 at the front but the outside ones at the front were silent. After removing the front lower grills and a fog light I could get my hand in and pull the sensors out. For some reason the rubber seal on the connectors had expanded pushing apart the connector which then worked loose and lost contact. The connectors could not be positively reconnected but nothing that a few turns of insulation tape couldn't fix. It now all works fine with 8 ticking sensors.

If this doesn't work then you can pull out all the sensors front and rear and buzz them out with a multimeter on a high resistance setting say 200KOhms. There are 3 pins so you would need to make 6 measurements per sensor to take into account polarity. I tried this approach first on the rear sensors and you do get meaningful readings, I would expect a faulty sensor to give a significantly different set of readings to the rest.

Also check you haven't picked up a parking scrape on one of your sensors or an impact from a stone or something.

good luck.

[chevron287]

Mine stopped working as well. It was just a fuse No 28 or 29 I think ? It's in the owners guide.

Cheers