Hi,

Brought a 2013 Mondeo Titanium X recently. Been great so far apart from cannot get the parking sensors to work.

When you put the ignition on there is a solid beep (assuming this is indicating a parking fault). No noise is made when putting in reverse or pressing front parking sensor button however the light does flash 6 times whenever the car is put in reverse or the button it pressed. 

I have had the scan tool on the car and it was unable to communicate with the parking sensor module so no error codes displayed. I have since replaced the 2 60A fuses in the front feeding the rear fuse box (heated seats and electric seat controls not working either so assumed this was a good place to start) and fuses in the rear box for parking sensors. No luck there so I have fitted a second hand parking module off eBay - still no luck.
Still unable to communicate with parking sensor module with scan tool to check for fault codes…

I’m assuming next thing to check is the loom but I’m not sure where to start with this. 

Does anyone have any wiring diagrams for the parking sensor system? 
 

Any help appreciated! Thanks!

Are you using a generic code reader ?

If yes, then you need to use FORScan which will read both the HS and MS Canbus, and the Ford specific DTC's.

Ford parking sensor "Beep Codes"

On 2/6/2024 at 12:31 PM, iantt said:

 

Code reader was a snapon code reader borrowed of a mechanic i know. Throught they were compatable with pretty much everything. 
The tone im getting at the beginning is just a solid tone, not followed by any beeps. 
Do you think getting forscan will help lead me to the problem? The more i think about it it must be a problem in the rear fuse box somewhere as there are multiple issues that im discovering. 
Parking sensors, heated + cooled seats (lights come on but no heating or cooling), electric seat adjustment both driver and passenger, passenger window also wont go up or down with the key when pressing and holding button on key but others will. 
Dont really know where to start looking but i wasnt sure if someone with experience would be able to point me towards an obvious fix. 

19 minutes ago, Nitro94 said:

Code reader was a snapon code reader borrowed of a mechanic i know. Throught they were compatable with pretty much everything. 

No, they don't read all of the Ford specific DTC's

Have now got forscan and and an adaptor! 
 

Showing Left Rear Inner sensor (B1B50). 
I have swapped it with the one of the other sensors, reset DTCs and its still showing as Left Inner Rear. 
 

Additionally it’s showing B1B57 and B1B58 Front and rear short circuit to ground. Im assuming these are likely triggered by the left inner rear. As the sensors dosent seem to be faulty im assuming theres a short in the wiring somewhere? 

Sods law my multimeter is broken so im gonna have to buy another before i can dig any deeper. 
 

Thanks for the help so far @unofix! Any more advice is much appreciated!

You might have a harness fault. My guess would be the actual connector on the harness for the 'left rear inner'

This is the parts list:

https://catalogs.ssg.asia/ford/?lang=en#bWFya2V0PT1ldXJvfHxjYXRfaWQ9PTExMDAyfHxjYWJicj09R0NBMnx8dGhrPT0zfHxzdD09NjB8fHN0cz09eyIyMCI6IkV1cm9wZSIsIjMwIjoiTW9uZGVvIENBMiAyMDA3LTIwMTQiLCI0MCI6IjQgRWxlY3RyaWNhbCIsIjUwIjoiNDEzMTMgRWxlY3RyaWNhbC5QYXJraW5nIERpc3RhbmNlIENvbnRyb2wiLCI2MCI6IjQxMzEzMDUgUGFya2luZyBEaXN0YW5jZSBDb250cm9sIn18fGFscGhhPT00fHxncm91cD09NDEzMTN8fHNlY3Q9PTQwMDVBSER8fHNldD09QTI0MTMxM3x8aW1nPT1HMDE2Mjc3MzA5fHxmMTI9PS03NjMzMTU3MTIrMTM1

Got to the bottom of it in the end! Was working in the dark before, once I had a look in daylight there was clear as day a snapped wire going to the sensor… too close to the plug to strip it back and solder it so i brought a spare plug on ebay and soldered that on. That fixed the sensor code but still had the short codes. I swapped my old module back in to try and get to the bottom of the short codes and they went away! The new module i purchased was faulty so i sent it back! 
Now enjoying fully working parking sensors! 
Thanks so much for the help @unofix