1.CHECK STOP LAMP SWITCH CIRCUIT
 
 2.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
 
 3.DETECT MALFUNCTIONING PART
 
 4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 5.DETECT MALFUNCTIONING PART
 
 6.CHECK STOP LAMP SWITCH
 
 7.CHECK INTERMITTENT INCIDENT