MID 081 - CID 1428 - FMI 04
产生此代码的情况:
请求档位命令信号电路对接地短路时,记录该诊断代码。 该电路是指连接制动器 ECM 到变速箱 ECM 的单导线。 导线(J883-BU)连接至制动器 ECM 的触点 J2-25 以及变速箱 ECM 的触点 J2-24。
注: 每个接头触针都应能耐受 45 N (10 lb) 的拉力。 每一根导线都应留在接头内不被拉出。 本测试用于检查导线是否正确压接在触针中,以及触针是否正确插接在接头中。
测试步骤 1. 检查信号电路是否对接地短路。
- 将钥匙起动开关和断路开关转到断开位置。
- 从变速箱 ECM 上断开机器线束接头 J1。
- 从制动器 ECM 上断开机器线束接头 J1。
- 在变速箱 ECM 的机器线束接头 J1 处,测量触点 J2-24(导线 J883-BU)到所有接地源之间的电阻。 接地源为触点:J1-13, J1-23, J1-26, J1-27, J1-28, J1-56, J1-57, J1-45, J1-70, J2-22 和 机架接地
预期结果:
各电阻测量值均应大于 5000 欧姆。
结果:
- 是 - 各电阻测量值都大于 5000 欧姆。 线束正常。 清洁断开的所有线束接头。 重新连接所有线束接头并确认诊断代码不再出现。 诊断代码可能是由于电气接触不良造成的。
修复: 如果没有找到该诊断代码的原因,则应更换变速箱 ECM。 确保更换 ECM 是绝对必要的。 参见测试和调整, "电子控制模块(ECM)- 更换 "。
停止
- 否 - 其中一个或多个电阻测量值不大于 5000 欧姆。 机器线束中存在短路。 具有低电阻测量值的电路中存在短路。 修理或更换机器线束。 核实修理后故障排除。停止
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