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故障理象一辆一汽大众CC轿车,累计行驶约3 000 km,主动巡行系统不起作用,接通巡行开关后,多功能仪表显示主动巡行故障。故障诊断与排除检查发现,接通点火开关后,仪表多功能显示器显示主动巡行故障,而多功能显示器菜单栏“前部辅助”却没有显示出来。用VAS5052A检测,读取的发动机电控单元内储存的故障代码有:53283 U1023——距离调节控制单元故障;05703 P1647——CAN总线内的控制单元编码/版本;49717 U0325——巡行控制前部距离范围传感器无通信(图1)。读取的距离调节控制单元内的故障代码有:00272——
Fault reason A FAW-Volkswagen CC Sedan, total travel of about 3 000 km, active cruise control system does not work, turn on the cruise switch, the multi-function instrument shows active cruise failure. Fault diagnosis and troubleshooting found that the ignition switch is turned on, the meter multi-function display active cruise fault display, and multi-function display menu bar “front auxiliary ” but did not show up. The VAS5052A detects and reads the fault codes stored in the engine electronics unit: 53283 U1023 - Distance control unit defective; 05703 P1647 - Control unit code / version within CAN bus; 49717 U0325 - Cruise control front No range sensor communication (Figure 1). Read the distance adjustment control unit fault code: 00272--