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将位于仪表板下的诊断连接器的端子1搭铁,根据仪表盘上故障指示灯闪烁的规律读取故障代码,无故障代码储存。起动发动机,让其运转1 min～2 min;然后将发动机熄火,均匀踩制动踏板数次并将制动踏板保持在最低位置;接着起动发动机,发现制动踏板没有自动下降,说明制动助力装置不起作用。分别检查制动助力装置的止回阀、真空软管和助力器等,发现止回阀的阀体和阀座不密封,用手动真空泵对其检查,发现它已经损坏。因制动助力装置的止回阀安装在制动真空软管中,更换制动助力
Ground the terminal 1 of the diagnostic connector under the dashboard to read the error code according to the flashing pattern of the error indicator on the instrument panel and save the error code. Start the engine, let it run 1 min ~ 2 min; then the engine flameout, evenly depress the brake pedal several times and keep the brake pedal in the lowest position; then start the engine and found that the brake pedal does not automatically drop, indicating that the brake booster The device does not work. Check the brake booster check valve, vacuum hose and booster, etc., found the check valve body and valve seat is not sealed with a manual vacuum pump to check and found it has been damaged. Due to the brake booster check valve installed in the brake vacuum hose, replace the brake booster