故障现象一辆2009年产的丰田汉兰达车,搭载1AR发动机和6速手自一体变速器,累计行驶里程约为7.2万km。车主反映发动机故障灯点亮,挂倒挡时,仪表中R挡和D挡指示灯同时点亮。故障诊断接车后,试车验证故障,维修人员将挡位置于倒挡时,的确如车主所说,仪表中R挡和D挡指示灯同时点亮(图1);将挡位置于D挡时,仪表中D挡指示灯点亮,R挡指示灯不亮。用故障检测仪读取故障代码,发现动力控制系统内存储有故障代码P0705,其含义为“变 Fault phenomenon An 2009 Toyota Highlander, equipped with 1AR engine and 6-speed manual transmission, the cumulative mileage of about 72,000 km. The owner of the engine fault lights lit, hanging block, the instrument in the R block and D block lights lit at the same time. Fault diagnosis After the car, the test to verify the failure, the maintenance staff will be placed in reverse position gear, indeed, as the owner said, the instrument R and D block indicator light at the same time (Figure 1); the block in the D block when , D indicator lights in the meter, R indicator does not light. Read the fault code with the fault detector and found that the power control system has stored fault code P0705, its meaning is ”change