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Tutorial on how to install the Jetta's multifunctional steering wheel with original radio and I-system module on my Polo. Instagram link: / joao.avr I-System module pinout (16-pin connector): Pin 01 - Horn (I didn't use it because I connected it another way) Pin 02 - Goes to pin 09 of the 20-pin radio connector Pin 03 - Goes to pin 08 of the radio's 20-pin connector Pin 04 - Goes to the parking module (if it has one) Pin 05 - Goes to pin 03 of the Hard disk Pin 06 - Goes to the K diagnostic wire Pin 07 - CAN comfort network Pin 08 - CAN comfort network Pin 09 - CAN traction network Pin 10 - CAN traction network Pin 11 - Goes to pin 10 of the 20-pin radio connector Pin 12 - Pin 13 - Goes to pin 11 of the 20-pin radio connector Pin 14 - Pin 15 - Negative Pin 16 - Positive Radio pinout (20-pin connector): Pin 08 - Goes to pin 03 of the I-system's 16-pin connector Pin 09 - Goes to pin 02 of the I-system's 16-pin connector Pin 10 - Goes to pin 11 of the 16-pin connector of the I-system Pin 11 - Goes to pin 13 of the 16-pin connector of the I-system Flywheel/hard disk pinout Pin 05 flywheel = 01 on the hard disk - Negative Pin 04 flywheel = 02 on hard disk - Positive after key Pin 03 steering wheel = 03 on hard disk - Goes to Pin 05 of the I-System Pin 02 Flywheel = 04 on hard disk - Airbag Pin 01 Flywheel = 05 on hard disk - Airbag