2)Voltage Method

（1）Turn on the ignition switch,namely,all the joints of the whole car are electrified.

（2）Measure the voltage value between the terminal 6# and reliable grounding,and if it changes in the range of 2.6-3.5 V,then it’s normal.

（3）Measure the voltage value between the terminal 14#and reliable grounding,and if it changes in the range of 1.4-2.45 V,then it’s normal，(as shown in Fig.2.9).(https://www.daowen.com)

Fig.2.9 Voltage Measurement Method