JAC HFC4DA1-2C - Page 175

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
176
Check harness damage. If the harness seems to be normal, move relevant connector and harness for intake air
temperature (IAT) sensor and check display about IAT on diagnostic tool. If display of IAT changes, it is indicated that
there is fault in the part.
Fault Tree:
检查传感器连接
做必要的修理
器件问题 更换传感器
检查传感器电阻（检查其是否与车辆
状态一致
接插件问题
检查连续性和绝缘性
Y
N
N
Y
检查是否为ECU插接件问题
Y
做必要的修理
N
电气问题
Y
修理线束
N
联系技术支持
Get the Technical Support.
Repair the harness.
Repair accordingly.
Repair accordingly.
Replace the sensor.
Check sensor connection.
Connector fault
Check sensor resistance (for conformity with vehicle
status).
Component fault
Check ECU for connector faults.
Check continuity and insulating property..
Electrical fault