X-touch not switching to reverse camera

[GunbleR]

Hello. 

Got Citroen c1 2017(aka toyota aygo) with 86140-0h010 x-touch toyota multimedia. After replacing Battery, x-touch system no longer switching to reverse camera.

Checked the reverse pin in connector, and it does recieve 12v on reverse, under-dash fuses are good and reverse light is working. I believe the camera is stock, but cant be sure.

Any ideas what can cause/solve this problem?

[flash22]

Do you get a black screen or nothing ? Check the camera is getting its 6 volts in reverse

[GunbleR]

Nothing changed on screen, i could operate it normally. Tried to find soft toggle for camera in HU, did not found

[flash22]

You can do a camera and reverse check in the hidden menu

Press and hold the lower button (physical button) and turn the lights on and off 3 times (or until the menu comes up)

[vol]

Hi,
I have similar problem with my aygo its not switching to camera , want to measure the reverse signal 12v but which pin to test?

[flash22]

As above, run the test in the hidden service menu  iirc its under function tests on page 2 (top right)

[GunbleR]

Finally got to this friend's car. In hidden menu, Vehicle signal does register reverse gear, but no second page in function check. 

I will try to measure 6v and splice rca to see image on external tv 

Edit. 

I do get 6v out on hu and camera shows on external tv. I'm thinking about upgrading firmware to HU manually. Any suggestions? 

Edited February 14, 2022 by GunbleR

[GunbleR]

On 1/9/2022 at 5:01 AM, vol said:

Hi,
I have similar problem with my aygo its not switching to camera , want to measure the reverse signal 12v but which pin to test?

If i remember correctly, it means "look from the back", so it may be pin #2

Also, i had reverse indication on black wire(originally -6v according to aftermarket adapters) in camera connector, when it was disconnected from HU.

when connected to hu, hu forced 0v onto it

[flash22]

click on "Vehicle Signal" in that hidden menu, the HU may not be getting a reverse signal or correct waveform from the camera

The camera looks to have moisture ingress (common) - replace the camera