EddyR Posted February 20, 2019 Share Posted February 20, 2019 The near side (passenger) electric mirror on my 2015 grand c max was smashed. I ordered a replacement from a big uk supplier, but when fitted the temp sensor and reversing sensors do nor operate. Re fitting the old harness restores function. Is this a normal wiring arrangement , if so I guess the part is unsuitable?? Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 20, 2019 Share Posted February 20, 2019 Very strange as those sensors are no where near the mirror. Quote Link to comment Share on other sites More sharing options...
iantt Posted February 20, 2019 Share Posted February 20, 2019 38 minutes ago, pragmatix said: Very strange as those sensors are no where near the mirror. The ambient air temp sensor is in the n/s door mirror Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 20, 2019 Share Posted February 20, 2019 2 hours ago, iantt said: The ambient air temp sensor is in the n/s door mirror Not on mine it isnt but mine is the nwer version., still don't understand the reverse sensors though. Quote Link to comment Share on other sites More sharing options...
iantt Posted February 20, 2019 Share Posted February 20, 2019 You sure It isn't? I don't understand the reverse sensors though. According to etis it's in the mirror housing, and the mirror connector c521 on pin 11 . That's grand cmax/cmax 2015 onwards. 1 Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 20, 2019 Share Posted February 20, 2019 25 minutes ago, iantt said: You sure It isn't? I don't understand the reverse sensors though. According to etis it's in the mirror housing, and the mirror connector c521 on pin 11 . That's grand cmax/cmax 2015 onwards. Well,i had that mirror swiped of the car and still had outside temp i think dont recall it missing. But im willing to be proved wrong. Quote Link to comment Share on other sites More sharing options...
EddyR Posted February 21, 2019 Author Share Posted February 21, 2019 The car is late 2015(nov) and temp sensor definitely in mirror as the thermocouple worked when the harness was hanging loose after mirror smashed off. Also re connecting and disconnecting wiring activated and halted reversing sensors?. Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 21, 2019 Share Posted February 21, 2019 Just thinking about the reverse sensors does you car have the all round sensors like mine does maybe the mirror plays a part in that system and its the wrong mirror Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted February 21, 2019 Share Posted February 21, 2019 Does your car have the blind spot indicator? If so, I think there is a radar sensor in the mirror which I would assume is also used by the parking sensors for auto-parking. With regards to the temp sensor, I have seen them both in the mirror housing and by the front bumper, I'm not sure if they changed location at some point or if both are fitted and an average taken between the two to remove the inaccuracies of parking in direct sunlight etc. 1 Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 21, 2019 Share Posted February 21, 2019 26 minutes ago, TomsFocus said: Does your car have the blind spot indicator? If so, I think there is a radar sensor in the mirror which I would assume is also used by the parking sensors for auto-parking. With regards to the temp sensor, I have seen them both in the mirror housing and by the front bumper, I'm not sure if they changed location at some point or if both are fitted and an average taken between the two to remove the inaccuracies of parking in direct sunlight etc. That makes sense and is what i was trying to say 1 Quote Link to comment Share on other sites More sharing options...
EddyR Posted February 24, 2019 Author Share Posted February 24, 2019 No blind spot sensor, but logically mirror and reversing sensors are a linked function ( I.e. going backwards views).However, I bought a new unit from ford dealer, fitted and all functions restored fine, so there is a wiring connection! now just returning the wrongly specced unit which was cheaper, but no good if unsuitable! cheers! 2 Quote Link to comment Share on other sites More sharing options...
pragmatix Posted February 24, 2019 Share Posted February 24, 2019 13 minutes ago, EddyR said: No blind spot sensor, but logically mirror and reversing sensors are a linked function ( I.e. going backwards views).However, I bought a new unit from ford dealer, fitted and all functions restored fine, so there is a wiring connection! now just returning the wrongly specced unit which was cheaper, but no good if unsuitable! cheers! Glad youve got it sorted. Quote Link to comment Share on other sites More sharing options...
tonyharrison Posted October 24, 2020 Share Posted October 24, 2020 Interesting - I too have a 2015 Grand C-Max 1.5TDCi (120hp) and need to look into how to access the outside-temp sensor in the LH (nearside) door mirror. Three Ford dealers told me very recently that the whole mirror unit has to be replaced, at between €400 (in France) and £200 (UK) - but I see one can obtain a replacement sensor, so... My dash outdoor-temp sensor has been giving wildly inflated readings all summer, and at the same time the engine cooling fan has been running excessively. I think there's a connection. Ford dealers have proved disturbingly vague about this - I don't think they have a clue. 1 Quote Link to comment Share on other sites More sharing options...
Darko_croatia Posted January 25, 2021 Share Posted January 25, 2021 @tonyharrrison did you solve issue? I have same problems since last 5 days... outside is around 0 C,and on display 42C, engine cooling fan working Quote Link to comment Share on other sites More sharing options...
appyad Posted September 7, 2023 Share Posted September 7, 2023 Any news? i really don’t want to pony up for a new wing mirror if there’s some clever button sequence that recalibrates the ambient temp sensor cheers! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Ford UK Shop
Sponsored Ad
Name: eBay
Ford Model: FordUK Shop
Ford Year: 2024
Latest Deals
Ford UK Shop for genuine Ford parts & accessoriesDisclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via the club
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.