Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

2015 i3 Rex rear camera failure

Mon Nov 23, 2020 12:03 pm

Hello,
Recently, my 2015 i3 back up camera has stopped working. At first, it displayed gray lines with an orange traffic cone. Then sometimes it would display a garbled image for just a moment and the screen would go black, but still contain the proximity sensor data on the screen. Now, it never displays an image at all. My thought is the camera failed, but I am taking some steps to attempt to troubleshoot the camera because not much info on the workings of the camera can be found online.

First, the hatch is shut properly.
Second, the camera is switched on in the options, but the icon is gray and is not selectable.
Third, the 12v battery is a year old Remy battery that was coded by me after . After removing the rear bumper and unplugging everything. I get exactly 12v at the camera plug. Using the legs of an old led, ground is the pin hole with the black wire and power is the green wire with blue stripe. 12v is kind of low even though it is a 12v battery, so I removed the battery and placed it on the charger, which read 60% charge. Will update as this progresses.

Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

Re: 2015 i3 Rex rear camera failure

Mon Nov 23, 2020 12:57 pm

Charging the 12v battery resulted in no change. Next step is to replace the camera since the module seems to be working.

frictioncircle
Posts: 136
Joined: Fri Nov 25, 2016 11:23 pm
Location: USA West Coast

Re: 2015 i3 Rex rear camera failure

Wed Nov 25, 2020 1:28 am

Something to consider... a broken wire in the harness where it enters the hatch? A broken hatch switch?

When the hatch is open, the iDrive display shows a diagonally hashed image with a traffic cone – the camera isn't obstructed in this situation (as it's in the bumper) but the driver is shown a blanked rear view to make the driver aware that the hatch is open.

If the car thinks the hatch is always open then it would never display camera video.

Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

Re: 2015 i3 Rex rear camera failure

Wed Nov 25, 2020 3:28 pm

Replaced camera with a new one. Problem solved. They don't make it easy. The camera isn't held in by screws... Once you remove the rear bumper and unplug the proximity sensors, the lights and the camera, the camera itself is attached to the bumper in a little plastic bracket that is held on with double sided tape. You could push the camera out forcefully, but the bracket would likely end up broken. Pry the bracket off and remove the tape along with all of its residue. The camera can be removed by prying on the tabs that hold it in near the lens and gently pushing in on the lens. It pops out through the rear of the bracket. The camera only fits in one way, so when popping the new one in, you can't mess it up. Place new automotive grade double sided adhesive on the bracket, and press it back into place on the bumper following the installation lines molded into the bumper. On mine, the side of the camera with the circular indentation faces upwards. Plug everything back in and reinstall the bumper.

Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

Re: 2015 i3 Rex rear camera failure

Wed Nov 25, 2020 7:40 pm

Well... Almost fixed. The camera works, but the red and green guide lines are kind of aiming skyward. The camera is properly installed. I think it's a calibration issue. Now to figure out how to do that.... Will post it once I have the answer.

frictioncircle
Posts: 136
Joined: Fri Nov 25, 2016 11:23 pm
Location: USA West Coast

Re: 2015 i3 Rex rear camera failure

Thu Nov 26, 2020 12:41 am

Lxer96 –

Wow, thanks for posting your experience – I would have expected a wiring harness problem long before a camera failure!

Do you have a good relationship with a local auto body shop? They (or one of their contractors) will have the tools to calibrate a new camera to the steering-angle sensor.

Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

Re: 2015 i3 Rex rear camera failure

Fri Dec 11, 2020 12:42 pm

Downloaded ISTA+ and waiting on the e-net cable to arrive. Should be able to calibrate the camera myself.

baz99
Posts: 7
Joined: Mon Jan 11, 2021 9:39 am

Re: 2015 i3 Rex rear camera failure

Mon Jan 11, 2021 12:22 pm

Thanks for the information. I'm currently in the process of removing bumper and camera/bracket from same.... I was really scratching my head wondering how to get the camera out before I found your information. My camera orientation, 2017 I3, is round marking downwards. I've opened the camera and all the electronics is easily removed so I'll try drying it in the oven there was some misting on the inside of the lens but none that I could see in the electronics. I'll probably order another one if I can get it for a decent price otherwise this one is going back on if I can get the lens to clear.

Lxer96
Posts: 9
Joined: Mon Nov 23, 2020 11:51 am

Re: 2015 i3 Rex rear camera failure

Mon Jan 11, 2021 12:33 pm

No problem. I may have to amend my post about the orientation. I just put it back in the way it came out. I still have my old camera with a clear lens if you want it. It never clouded up. Something in the circuitry probably failed. If you pay shipping, I’ll send it out. I took it apart before. There are three circuit boards on the inside kind of sandwiched together. The guts can be removed and yours can be swapped in.

baz99
Posts: 7
Joined: Mon Jan 11, 2021 9:39 am

Re: 2015 i3 Rex rear camera failure

Fri Jan 15, 2021 4:08 am

Sent you a PM thanks

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