B2620 Suzuki Display dimming PWM input circuit malfunction

Suzuki Vehicle:Suzuki XL7,Suzuki Kizashi,Suzuki Escudo,Suzuki SX4,Suzuki Wagon R,Suzuki Alto,Suzuki Cervo,Suzuki Cappuccino,Suzuki Fronte,Suzuki Grand Vitara,Suzuki Ignis,