Hello all. Not sure if i'm putting this request in right place? This is 3rd time asked, hopefully a response this time.
My parking sensor system stopped working. I think they are factory fitted, as all wiring is very neat with exterior wires in plastic trunking. The symptoms are; when reverse engaged just a single slightly long 'bing' sound with the switch lighting up (the one to manually turn on/off the system). The dash light also comes on (a P with wifi type symbol next to it) I believe these means a fault.
Here is what I've done:
Fuses OK; I took all 8 sensors off and tried to measure with meter but not sure what resistances I should find. They appear similar; 1-3 MegOhms typically between pins 1-3 and between 2 and 3. There is a very fixed 6 kOhm between pins 2 and 3. When system is on with engine off (i put in reverse) if you put your ear to the sensors I can hear a low frequency pulse as mentioned elsewhere on this forum I? Does this mean sensors OK? I noted a BOSH box in the little stowage area near rear light clusters. It does not say anything about parking but has the number 965 in a circle which is also on the sensors themselves? Is this the sensor control box?
Any tips on how to check the system out? Can it be tested? Has anyone got a circuit diagram for the OEM system fitted to the estate model??