Parking Assistance Faulty

[krle59]

Dear
A few days ago on the Peugeot 508 SW year 2012. VIN: VF3**************[VIN obfuscated, can be read by forum staff], when starting, the warning Parking Assistance Fault appeared, but after some time the SERVICE disappeared and the parking assistance was working.
The next day it appeared again however the SERVICE didn't go away and the parking help didn't work.
Using Lexia3 and Diagbox I got:

Diagbox error message

I cleared the errors and replaced the left with the right front inner sensor and got the same error message again.
I removed the front bumper and checked for an open or maybe a short in one of the wires for each of the sensors to the common connector on the bumper.
There is no open or any wire is shorted.
I don't know where the location of the parking assistance ecu is.

Does anyone have any ideas on what I should do next?
Thanks in advance.

[GiveMeABreak]

The sensors can be faulty internally as water ingress causes the issue. If one sensor is down the parking assistance ECU disables the system. There are rarely issues with the ECU itself, but the Parking Assistance ECU is located here on the inner left compartment of the boot area, marked as 7500 and showing the connections into it.

[krle59]

Dear
thanks for quick response

I assume that the sensor is correct inside, because when I switch the sensor from that location to another, it does not report an error, and the sensor from another location reports an error in that place. That's why I first checked the wiring in the bumper, and now I want to see that there is no problem with the wiring to the parking ECU. If you have any other ideas on what to check, that would be great.

Thanks in advance.

[Hell Razor5543]

If you are going to check the wiring do NOT rely on the colour of the wires, as it is not unknown for them to change colour along their length (for example, when they go through connectors). However, each wire will have a unique code, printed along its length every few inches.

[GiveMeABreak]

Dear
thanks for quick response

I assume that the sensor is correct inside, because when I switch the sensor from that location to another, it does not report an error, and the sensor from another location reports an error in that place. That's why I first checked the wiring in the bumper, and now I want to see that there is no problem with the wiring to the parking ECU. If you have any other ideas on what to check, that would be great.

Thanks in advance.

So have a check that the wiring plugs to the TPMS are all ok, but having changed the sensors over, you are likely getting a break in the wiring from the sensor back through the harness to to the TPMS unit.

[krle59]

Thanks for all reply.
After checking all the wires from the female connector on the bumper to the connector on parking assistance ECU, with a resistance meter, I found a broken wire.
The break was a few cm at the connector on the bumper.
Regards

[GiveMeABreak]

Great, thanks for the update.

[Swiper]

Hello,

I do not want to open a new thread, just quick question... I should replace one of the parking sensors for my Peugoet 508 2012y. The original one is: "PSA 96 660 163 779H". Can I replace it with "PSA 96 660 163 77N9". It looks similar except last two numbers. Thanks

VIN: VF3**************[VIN obfuscated, can be read by forum staff]