Hi all,
On my Audi A3 8P year 2008 I've an Android head unit with a 7862S processor, 8/128 RAM/memory, wiring harness with a AU 10.20 CANBox.
Can data works works quite well, the steering wheel buttons works (just one doesn't works and it has not recognized from learning app of the android unit). The big problem is that the "ACC" signal is not decoded from S-Contact (key present into the key switch) as like the OEM radio unit but is taken on the +15 of the key switch. This is a problem because the radio can be powered-up only with the key-on and it's switched off immediatly if the car is stopped.
For example this device: https://www.ars24.com/en/can-bus-adapte ... -2006-2011 give the correct ACC signal decoded fromS-CONTACT of CANBUS.
Can you please update the firmware to make it works correctly like the OEM one?
If you need to test it I can do the test for you with pleasure.
Thanks in advance.
Davide
Audi A3 8P with AU 10.20 not power up with CAN signal "S-CONTACT"
Re: Audi A3 8P with AU 10.20 not power up with CAN signal "S-CONTACT"
This is a simple research on the net:
In the Audi A3 8P, the factory radio is designed to stay powered as long as the key is in the ignition and has been turned to at least the Accessory (ACC) position. If your radio is turning off as soon as the engine stops (before you remove the key), check the following methods to restore or adjust this behavior:
1. Standard Ignition Behavior
For factory-installed units, the radio should only power off once the key is physically pulled out of the ignition cylinder.
To maintain power after parking: Turn the engine off but do not pull the key out. The radio should continue playing until you remove the key.
Manual Override: If the ignition is off and the key is removed, you can usually turn the radio back on manually by pressing the volume/power knob. It will typically run for a timed period (often 30–60 minutes) before turning off to protect the battery.
2. Aftermarket Head Unit Issues
If you have an aftermarket radio that shuts off immediately when the engine stops, it is likely due to how it is wired.
CAN bus Adapter: The Audi A3 8P uses a CAN bus system rather than a traditional 12V switched ignition wire. To make an aftermarket radio stay on until key removal, you must use a CAN bus wiring harness adapter that specifically supports the "S-contact" (key sense) signal.
In the Audi A3 8P, the factory radio is designed to stay powered as long as the key is in the ignition and has been turned to at least the Accessory (ACC) position. If your radio is turning off as soon as the engine stops (before you remove the key), check the following methods to restore or adjust this behavior:
1. Standard Ignition Behavior
For factory-installed units, the radio should only power off once the key is physically pulled out of the ignition cylinder.
To maintain power after parking: Turn the engine off but do not pull the key out. The radio should continue playing until you remove the key.
Manual Override: If the ignition is off and the key is removed, you can usually turn the radio back on manually by pressing the volume/power knob. It will typically run for a timed period (often 30–60 minutes) before turning off to protect the battery.
2. Aftermarket Head Unit Issues
If you have an aftermarket radio that shuts off immediately when the engine stops, it is likely due to how it is wired.
CAN bus Adapter: The Audi A3 8P uses a CAN bus system rather than a traditional 12V switched ignition wire. To make an aftermarket radio stay on until key removal, you must use a CAN bus wiring harness adapter that specifically supports the "S-contact" (key sense) signal.