Hello all, I've been having the above problem since last winter. The car has been parked for 2 weeks during frost. When I gotten back to driving it noticed the passenger's power window doesn't work. Maybe 1 mile down the road DPF went crazy too, but that seems to have fixed itself by doing dpf regen 3 times on a course of 3000 miles.
Later down the line I started realizing that it's not only the window problem, but also the immobilizer doesn't work and the alarm doesn't trigger when the car is locked, the ultrasonic sensors when the car is locked and windows open doesn't work either, I thought the boot release was working for some time but I think I may have always been using the key to open the boot and noticed it doesn't work too. The mirror defrost and control for passenger side doesn't work either.
One of the errors that remains is DTC B1142 - "Power windows master switch lost communication with the other units(UART communication error)"
I've found this manual and tried replacing the master switch, disconnecting the passenger control unit, replacing the passenger motor, but none of these fix the issue.
Also erasing the error code re-triggers the error instantly.
I've looked on the forum and noticed this seems to be a common theme with some trials and errors of people trying things. contact cleaners, replacing the unit or drying the contacts, but all the threads go cold and no definitive answer is found:
Things suggested in the above threads:
Thought it would be good to have a unified thread about this. Will try to message other thread owners and see how have they been doing with this problem.
P.S I've taken pictures of part codes of master window and passenger window control units:
Later down the line I started realizing that it's not only the window problem, but also the immobilizer doesn't work and the alarm doesn't trigger when the car is locked, the ultrasonic sensors when the car is locked and windows open doesn't work either, I thought the boot release was working for some time but I think I may have always been using the key to open the boot and noticed it doesn't work too. The mirror defrost and control for passenger side doesn't work either.
One of the errors that remains is DTC B1142 - "Power windows master switch lost communication with the other units(UART communication error)"
I've found this manual and tried replacing the master switch, disconnecting the passenger control unit, replacing the passenger motor, but none of these fix the issue.
Also erasing the error code re-triggers the error instantly.
I've looked on the forum and noticed this seems to be a common theme with some trials and errors of people trying things. contact cleaners, replacing the unit or drying the contacts, but all the threads go cold and no definitive answer is found:
Passenger door window/mirror/boot and hazards not working
Hi. I just solved the above by removing the passenger switch ***y and spraying with contact cleaner, seems ok now. Hope this helps someone.
typeaccord.co.uk
Passenger Front electric window switch needed
Any one breaking a Mk8 2.2idtec ex? Need switch part number 35760TL0E11 Apparently mine has gone and its the reason why my window isnt operating, my power folding mirror (passenger side) to not fold, heat or adjust, my boot release button not to work and no flashing of indicators when locking...
typeaccord.co.uk
Passenger Front Window Switch Module Fault
Hi all, My passenger front window module has decided to pack up again. This happened when I bought the car (I managed to get a decent chunk of money off it because of this), I took it out, cleaned it up and lacquered it and it's been fine for over 2 years. It is with our electronics engineer at...
typeaccord.co.uk
Things suggested in the above threads:
- Drying passenger side Power Window Control Unit (in oven)
- Using contact cleaner on passenger side Power Window Control Unit
- Replacing the unit
- Replacing the master switch
- Replacing passenger motor
Thought it would be good to have a unified thread about this. Will try to message other thread owners and see how have they been doing with this problem.
P.S I've taken pictures of part codes of master window and passenger window control units:
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