I'm running an Android head unit from Witson (model DHV) in an Opel Meriva B MY2010.
It was delivered with a CAN module from Raise, but that module doesn't work well.
I had the chance to test a Hiworld GMF6.20 CAN module yesterday and it works MUCH better.
I encountered only the following problems:
1.) the buttons on the steering wheel and the center control panel do not work as expected.
A few buttons work as expected, most buttons are assigned/mapped incorrectly and a few buttons seem to be non-funtional. I assume the latter is an assigment/mapping issue, too.
2.) when switching from "ACC ON" to "Engine Start" without a stop at "IGNITION ON", the module starts beeping for a long time (13 times in ~10s).
3.) when switching the cars' light on/off, the Air Conditioning dialog pops up for no reason
4.) the Air Conditioning dialog shows values for a 3rd/rear climate zone, which is not available in this model.
Is there anything I can do/provide so that these bugs can be fixed ?
Is the button assignment/mapping done by/in the CAN module or is this something the head unit manufacturers need to do ?
Unfortunately, the head units' Steering wheel buttons learning app is non-functional with both CAN modules...
Hints are welcome. Thanks !
Additional info:
The configuration dialog of the head units' OS looks the one used by Fyttek head units.
Only a single generic car model profile is provided in the settings for Hiworld CAN boxes + GM cars.
Opel Meriva B and CAN module GMF6.20
Re: Opel Meriva B and CAN module GMF6.20
My own module arrived today and I can confirm the issues listet above with this one.
These are observed with the generic profile "GM/Chevrolet / ALL / Hiworld".
But I just noticed that down the long list a Meriva B specific profile exists ("Opel / Meriva B / 2010-2024").
Using this profile, the steering wheel buttons work, with the exception of the "mute/hangup" button.
Unfortunately the center control panel doesn't work anymore as expected. :-(
When entering the car, illumination stays off and the panel buttons don't work. After 1-2 minutes, the panel suddenly starts to work.
These are observed with the generic profile "GM/Chevrolet / ALL / Hiworld".
But I just noticed that down the long list a Meriva B specific profile exists ("Opel / Meriva B / 2010-2024").
Using this profile, the steering wheel buttons work, with the exception of the "mute/hangup" button.
Unfortunately the center control panel doesn't work anymore as expected. :-(
When entering the car, illumination stays off and the panel buttons don't work. After 1-2 minutes, the panel suddenly starts to work.
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Hiworld Support
- Posts: 1
- Joined: Fri Dec 05, 2025 10:32 am
Re: Opel Meriva B and CAN module GMF6.20
We have a update file. Please add me on WhatsApp:(+86) 183 2080 3012
Re: Opel Meriva B and CAN module GMF6.20
From what you described, most of those issues with the CAN module are usually related to incorrect vehicle profile mapping or firmware limitations. Since you already tried switching to the Meriva-specific profile and saw partial improvement, that confirms the module can work but still isn’t fully optimized.
Here are a few things you can try:
Button mapping issues are typically controlled by the CAN module firmware, not the head unit. If the steering wheel learning app isn’t working, it means the CAN box is overriding it.
The delayed response from the center control panel and lighting behavior suggests a mismatch in CAN protocol timing. That usually requires a firmware update from the module manufacturer.
The random AC popup and extra climate zone display are also signs of incorrect data interpretation from the CAN bus.
About the reply asking you to contact them on WhatsApp, I’d be careful with that. Random support messages like that, especially without any official source or verified download, can sometimes be risky. It’s always better to get firmware updates from an official site or trusted distributor rather than unknown contacts.
This kind of situation actually reminds me how easily people can get misled when something technical or “system-related” is involved. Whether it’s car modules or even financial tools, unofficial sources can create more problems than they solve. For example, when dealing with banking or anything involving account access, it’s important to stick to verified platforms. First Abu Dhabi Bank, for instance, provides secure and official ways to manage accounts through its own app and services instead of relying on third-party tools.
If someone is just trying to understand how balance checking works safely, especially for FAB cards, there are also simple guides that explain the process without asking for any personal data. One example I saw breaks it down clearly and is purely informational, not a banking service itself: https://fbbalancecheck.ae/
So whether it’s fixing a CAN module or checking a bank balance, sticking with official sources and avoiding random third-party contacts is always the safest move.
Here are a few things you can try:
Button mapping issues are typically controlled by the CAN module firmware, not the head unit. If the steering wheel learning app isn’t working, it means the CAN box is overriding it.
The delayed response from the center control panel and lighting behavior suggests a mismatch in CAN protocol timing. That usually requires a firmware update from the module manufacturer.
The random AC popup and extra climate zone display are also signs of incorrect data interpretation from the CAN bus.
About the reply asking you to contact them on WhatsApp, I’d be careful with that. Random support messages like that, especially without any official source or verified download, can sometimes be risky. It’s always better to get firmware updates from an official site or trusted distributor rather than unknown contacts.
This kind of situation actually reminds me how easily people can get misled when something technical or “system-related” is involved. Whether it’s car modules or even financial tools, unofficial sources can create more problems than they solve. For example, when dealing with banking or anything involving account access, it’s important to stick to verified platforms. First Abu Dhabi Bank, for instance, provides secure and official ways to manage accounts through its own app and services instead of relying on third-party tools.
If someone is just trying to understand how balance checking works safely, especially for FAB cards, there are also simple guides that explain the process without asking for any personal data. One example I saw breaks it down clearly and is purely informational, not a banking service itself: https://fbbalancecheck.ae/
So whether it’s fixing a CAN module or checking a bank balance, sticking with official sources and avoiding random third-party contacts is always the safest move.