1)cruise control on/off input circuit,巡航控制接合/分离输入回路2)cruise control brake/clutch input circuit,巡航控制制动器/离合器输入回路3)cruise control on/off switch,巡航控制接合/分离开关4)cruise control set/resume input circuit,巡航控制调定/恢复输入回路5)cruise control circuit,巡航控制回路6)cruise control on/off switch fault,巡航控制接合/分离开关故障