There are 2 ways xtrons units manage the SWC, through canbus and through wires
Most of the units manage it by canbus, and there is not much that user has to do. The most common issue here is lack of connection, and bad settings.
Canbus way
If your SWC is managed by canbus, you will need to make sure this cable is connected to the unit, and the canbus line is connected to this cable (unless not required, example below):
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Example of IEP12ISL:
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As you can see on the photo above, the canbus cable is plugged into the unit, and the canbus line coming from ISO cable is connected to the canbus cable (Connection nr 40)
Example of IEP92FSFB:
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Same here, you can see on the photo above, the canbus cable is plugged into the unit, and the canbus line coming from ISO cable is connected to the canbus cable (Connection nr 13)
Example of PEX72HGTL:
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As you can see on this example, the unit doesnt utilize canbus cable. Instead, the unit has special DEDICATED SWC line on the iso (plug nr 34):
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Most of the canbus controlled steering wheel issues arise because customers forget to plug that canbus cable, and can line together, so make sure its connected as per Wiring Diagrams (Those can be found on this forum. navigate HERE, and find your series)
Sometimes it happens that the unit dont have correct CAN Type selected in Factory settings. If the SWC is controlled by Canbus, then correct CAN type has to be selected in factory settings.
Please go to How to select correct CAN Type for my car, to find out which CAN type has to be set for your car.
Wired Way
If your cars swc is not managed by canbus, then you will need to connect special cables. Those will be KEY1 and KEY2:
Example of TE723L:
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As you can see on the wiring above, there are KEY1(nr25) and KEY2(nr28) wires on the ISO
These 2 cables has to be connected to the steering wheel control cables of your car (refer to car manufacturer).
If your car has digital steering wheel interface, you may need special cable provided by Connects2 Company. Visit their website, and find correct cables for your car.
How to program Steering Wheel buttons
PE / PEX / IE / DE / TE / IA / TIA / PST / PSD / PSA / PSP / TSF / PSF / MA / PME / TME / TMA / TE Series:
Go to Settings - Car infotainment - SWC
Tap the button you want to program on the screen, it wil start flashing blue, then press the button on the steering wheel to assign the button - the botton on the screen will stop flashing and remain blue. Repeat for all the rest.
IQ / TQ / PQ / PQS series:
Go to Settings - Car - Steering Wheel Keys
Press the button on the steering wheel that you want to program
Select function for short and long press
Tap OK
Repeat for all the rest.
Tap Save
IX / TIX / TX Series:
Go to Settings - Car settings - Steering Wheel Settings
Press the button on the steering wheel that you want to program
Select function for short and long press
Tap Save
Repeat for all the rest.
NOTE:
Not all car models SWC can be programmed, it subjects to car restrictions. Some cars Despite being canbus controlled, wont allow SWC programming.