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故障现象一辆帕萨特2.8 L轿车,行驶里程约为3.6万km,其遥控钥匙偶尔失灵。故障诊断接车后试车,在车外按下遥控钥匙按键,发现解锁和闭锁都正常,约5 min后再次按下遥控钥匙按键,遥控钥匙失灵,约1 min后遥控钥匙又恢复正常。检查4个车门和后备箱的闭锁信号,均正常。由于舒适系统控制单元和天线出故障的可能性较小,怀疑故障出在遥控钥匙上。拆开遥控钥匙,测量遥控钥匙电池电压,约为2.8 V(正常应在3 V以上),偏低。更换遥控钥匙电池并匹配遥控钥匙后试车,遥控钥匙仍偶尔失灵。难道是遥控器按键有问题?更换遥控钥匙外壳并匹配遥控钥匙后试车,故障依旧。
Fault phenomenon A Passat 2.8 L sedan, driving about 36,000 km, the remote control key occasional failure. Troubleshooting After the car was unloaded, press the remote control key and found that the unlocking and locking were normal. After about 5 minutes, press the remote control key again, the remote control key failed and the remote control key returned to normal after about 1 minute. Check the four doors and trunk lock signal, are normal. Due to the less likely failure of the comfort system control unit and antenna, the fault is suspected to be on the remote control key. Open the remote control key, measuring the remote control key battery voltage, about 2.8 V (normal should be more than 3 V), low. Replacing the remote key battery and matching the remote key after testing, the remote key still fails occasionally. Is there any problem with the remote control keys? After replacing the remote key shell and matching the remote control key to test, the fault still exists.