Touch screen blank

[Kieron]

Hi all
Haven't used the Amazon for a year nearly a year. My touch screen went blank. Picked up another one from the Middle East. It didn't work but I assume it is ok. Checked both fuses under the hood as you'd say and the one in the footwell, both ok.
From what I've read even if the black box the a.c heater control amplifier and ecu fail the screen will still work but obviously unable to use the ac and heating controls on the screen.
There is power to both units .
Well what do I do next. The UK is very damp in the winter so right now it's difficult to use the car without control of either the heating or cooling. I've still got the rear blower working as it's not integrated into the touch screen thank god.
Well... Do I buy yet another screen and pray for the best ?
Most folk say get a good auto electrician on the job. Most aren't interested or live the other end of the country
Thoughts appreciated
It also has navigation built on, rev camera , mpg etc
UK spec 2004 100 series
Cheers all

 

[Kieron]

The gateway ecu no 13 part no. 89111-60030 at the rear of the screen. Is there a way I can test it in site ?

 

[excessive]

there are wiring schematics floating around on this forum somwhere....

 

[Kieron]

Cheers ill take a look

 

[Kieron]

Is there a aftermarket screen that Wil do everything that the original screen does ??

 

[SMLE]

Is there a aftermarket screen that Wil do everything that the original screen does ??

Hi there,

I also have a 2004 and am in the UK - touch wood I've not had this issue yet!

There are some examples on AliExpress that will do it, but you're gambling £400-500 on something that might not work. I think the fact that both units aren't working might be indicative of a different issue e.g. not the units.

From memory after seeing a repair service for them before online, the MFD (multi function display, aka the touch screen unit) has an issue with a particular pin on one of the internal boards needing resoldering, but the chances of both being faulty is pretty low.

A few points to note, was there any damp in the car? Wet mats etc? The windscreens leak/sunroof drains can block, and the fuse boxes in each front foot well can get drenched with water which will cause gremlins.

Have you checked both fuse boxes and also the one in the engine bay? I don't recall which each does, but worth checking everything.

Does your windscreen have the mouldings etc all in place down the sides and the rubber strips covering where the rivets hold the mouldings in place?

Good luck

 

[Kieron]

Hi thanks for your reply
Yes the car is dry
I've checked the 2 fuses one under the bonnet and one in the footwell
Apparently if the ac amplifier..Black box isn't working the screen should still work excluding the ac. So I'm inclined to think it's the Gateway ecu marked 13
I've learned a lot from Chatgpt often siting this website for its research.
This particular ecu controls a lot of the dash
So I bought a used Gateway with matching part and batch no. , and my plan now is to fit it and see what happens. If it still doesn't work I plan checking all the pins on the connector to the gateway and the condition of its earth bolt connector
I'll let you know how I get on

 

[Kieron]

No joy the screen still doesn't work

 

[LJE]

Hey there! Have you checked to make sure the screen system is getting ACC power when you turn the key on?

 

[Kieron]

Whst is ACC power please ?

 

[dallen341]

Accessory. Powers radio for example. Usually 1st key position from off position

 

[Kieron]

Accessory. Powers radio for example. Usually 1st key position from off position

Hi thanks for getting back to me so promptly
My radio is working fine which I can control from the buttons below the screen
But if you can tell me the correct wire to see if power is reaching the screen I can check it
I’ve checked that there is power getting to the screen one cable which I think is a permanent feed also one cable going to the ac amplifier
I have read that even if the ac amplifier has failed the screen will still work

Just a question …..is there another fuse inside the touch screen that needs checking ?

 

[LJE]

Hi thanks for getting back to me so promptly
My radio is working fine which I can control from the buttons below the screen
But if you can tell me the correct wire to see if power is reaching the screen I can check it
I’ve checked that there is power getting to the screen one cable which I think is a permanent feed also one cable going to the ac amplifier
I have read that even if the ac amplifier has failed the screen will still work

Just a question …..is there another fuse inside the touch screen that needs checking ?

No fuse inside the screen - I can confirm that the screen will turn on even without the AC amplifier (the black box) working properly.