The invention discloses a reliability testing 
system and method of an automobile 
remote control key. The 
system comprises a computer, a 
single chip microcomputer, a switch power source, a 
voltage adjustable output module and a 
radio frequency module. The switch power source is connected with and powers the 
single chip microcomputer and the 
radio frequency module; the PWM (
pulse width modulation) interface of the 
single chip microcomputer is connected with the control end of the 
voltage adjustable output module; the input end of the 
voltage adjustable output module of is connected with the switch power source, and the output end of the voltage adjustable output module is connected with the power end of the a 
remote control key to be tested; the AD (analog / digital) interface of the single 
chip microcomputer is connected with the output end of the voltage adjustable output module, and two IO (input / output) interfaces of the single 
chip microcomputer are connected with the unlocking 
keying circuit and the locking 
keying circuit of the 
remote control key to be tested respectively; a 
communication interface is connected with the 
radio frequency module, the radio frequency module is communicated with the remote control key to be tested in a 
wireless mode; the computer is connected with the single 
chip microcomputer. The reliability testing 
system and method of the automobile remoter control key is applicable to the 
power supply voltage step-down process of the automobile remote control key to test the reliability of code hopping, low-battery warning and minimum working voltage of the remote control key, can reduce the manpower cost and can reduce the possibility of errors.