Perplexing issue with Intelli key

[Bentley88]

Hi, 

In short my problem is that since my mechanic fixed a wiring issue,

- the range for unlocking my car is severely reduced (5m down from like 40m) 

- when you hit the lock button several times the headlights no longer come on (as they used to to help you see it when you lose it in the car park) 

- my left wing mirror doesn't fold in when locked (the right one still does) 

... 

The work he did was to fix the bundle of wires that go to the back of the car - some had shorted together. He also disconnected the battery at the time to reset the computer.

I have also had an issue (in the past) with water leaking from above the windscreen down into the body control module - since "fixed" by drying and silicone spraying the module. Water is not an issue this time round as the car is bone dry.

... 

I suspect that the issue is a result of the work that the mechanic last did. But I don't know where the problem would be: intelligent key module, wiring, BCM, a mix of the above.

Also not sure of there is somehow a software glitch as a result of disconnecting the battery.

Edited January 25, 2021 by Bentley88

[V35_Paul]

Sounds like a few possible causes.

Bad earth.

Group of wires pinched together to tight so that they get crossed wired.

If you have a Dash Cam with the USB cable running down the A Pillar it can interfere with your key.

Left mirror still folds in when you activate it?

Electronics sometimes do strange things 

 

[Bentley88]

Yeah could very well be the wiring, I might have a look and see if there is anything obvious in the area the mechanic worked. Bad earth also a good suggestion.

No dash cam in the car.

Left mirror doesn't fold at in response to locking/unlocking. But it can still be adjusted from the drivers side via the toggle...