Why won't my car steer?

Hello guys! I can't make my car steer. On the computer it runs ok with those Input.GetAxis, but I can't make it work on the android device. What should I change in this code to make it run on phone? Also what is a substitute for Input.GetAxis for android, because it doesn't seem to be working on phone. Thanks in advance!

     var maxTorque : float = 200;   
     var speed:float=3;    
     var GasTouch : int = 0;
     var Steer : int = 0; 
 
     var BackLeft : WheelCollider;
     var BackRight : WheelCollider;
     var FrontLeft : WheelCollider;
     var FrontRight : WheelCollider;
     
     var LeftButton : GUITexture;
     var RightButton : GUITexture;
     var GasButton : GUITexture;
     var Joystick : GUITexture;
       
     function Awake()
     {    Joystick = GameObject.Find("Joystick").guiTexture;
         LeftButton = GameObject.Find("LeftButton").guiTexture;
         RightButton = GameObject.Find("RightButton").guiTexture;
         GasButton = GameObject.Find("GasButton").guiTexture;
     }    
     function Update()
     {
     BackLeft.motorTorque=-maxTorque * Input.GetAxis("Vertical");
     BackRight.motorTorque=maxTorque * Input.GetAxis("Vertical");
     //FrontLeft.steerAngle=20 * Input.GetAxis("Horizontal");
    // FrontRight.steerAngle=20 * Input.GetAxis("Horizontal");
         
      for (var touch : Touch in Input.touches)
     {
         if (touch.phase == TouchPhase.Stationary && GasButton.HitTest (touch.position))     {
             GasTouch = 1;
         }
         else if (touch.phase == TouchPhase.Ended && GasButton.HitTest) {
             GasTouch = 0;
         }
         if (touch.phase == TouchPhase.Stationary && LeftButton.HitTest (touch.position))     {
         Steer = -1;
         FrontLeft.steerAngle = -15.0;
         FrontRight.steerAngle = -15.0;
     
         }
         else if (touch.phase == TouchPhase.Ended && LeftButton.HitTest){
         Steer = 0;
         FrontLeft.steerAngle = 0;
         FrontRight.steerAngle = 0;
         }
         if (touch.phase == TouchPhase.Stationary && RightButton.HitTest (touch.position)) {
         Steer = 1;
         FrontLeft.steerAngle = 15.0;
         FrontRight.steerAngle = 15.0;
         }
         else if (touch.phase == TouchPhase.Ended && RightButton.HitTest){
         Steer = 0;
         FrontLeft.steerAngle = 0;
         FrontRight.steerAngle = 0;
         }
         
    }
    
    if(GasTouch!=0)
    {
    transform.Translate(Vector3.forward*speed/100);
    }