Troubleshooting › Cooling system › Diagnosis
P200716-故障诊断 · T00606836

 P200716 - TroubleshootingP200716-故障诊断

Fault code description故障码说明
DTC故障码(DTC)
Fault code description故障码描述
Possible cause of failure可能故障原因
P200716
Electronic fan undervoltage fault电子风扇欠压故障
1. The low-voltage power supply voltage is too low1.低压电供电电压过低
Troubleshooting steps故障诊断步骤
①General inspection一般检查
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Check the electronic fan wire harness for damage, breakage, loose connection, etc.检查电子风扇线束是否存在损坏、断裂、虚接等现象。
3. Check the electronic fan harness connector for loose connection or damage.检查电子风扇线束接插件是否存在虚接、损坏等现象。
Are the test results normal?检查结果是否正常？
Yes是 Go to step 2.去步骤2。
No否 Repair or replace electronic fan harness or connector.维修或更换电子风扇线束或接插件。
②Check 12V battery voltage检查蓄电池电压
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正、负极之间的电压。
Standard voltage value: about 12.5V标准电压值：约12.5V
Are the test results normal?检查结果是否正常？
Yes是 Go to step 4.去步骤4。
No否 Go to step 3.去步骤3。
③Check DCDC output voltage检查DCDC输出电压
1. Power status "ON".电源状态“ON”。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正、负极之间的电压。
Standard voltage value: about 14V标准电压值：约14V
Are the test results normal?检查结果是否正常？
Yes是 Charge the 12V battery and replace it if necessary.对蓄电池进行充电，必要时更换蓄电池。
No否 Inspect and repair DCDC and related lines.检修DCDC及相关线路。
④Check fuse检查保险丝
Graphic
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Open the battery-positive fuse box and check whether the FAN fuse is blown.打开正极电器盒，检查FAN保险丝是否熔断。
FAN：60A
Are the test results normal?检查结果是否正常？
Yes是 Go to step 5.去步骤5。
No否 Replace the fuse with the same specification.更换相同规格的保险丝。
⑤Check the fan relay power supply harness检查风扇继电器供电线束
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Open the battery-positive fuse box and disconnect the battery-positive fuse box harness FB36.打开正极电器盒，断开正极电器盒线束FB36。
3. Open the electrical box in the front compartment and pull out the fan relay ER09.打开前舱电器盒，拔出风扇继电器ER09。
4. Use a digital multimeter to measure the resistance between pin 1 of the FB36 and jack 30 on the fan relay base.用数字万用表测量FB36的1号针脚与风扇继电器底座的30号插孔之间的电阻。
Standard resistance value: <1标准电阻值：＜1 Ω
Are the test results normal?检查结果是否正常？
Yes是 Go to step 6.去步骤6。
No否 Repair or replace the fan relay power supply harness.维修或更换风扇继电器供电线束。
⑥Check fan relay检查风扇继电器
Graphic
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Open the electrical box in the front compartment, replace the fan relay ER09 with a new one, and check whether the fault code and symptoms are eliminated.打开前舱电器盒，更换新的风扇继电器ER09，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Go to step 7.去步骤7。
⑦Check the electronic fan power harness检查电子风扇电源线束
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Open the electrical box in the front compartment and pull out the fan relay ER09.打开前舱电器盒，拔出风扇继电器ER09。
3. Disconnect electronic fan harness connector FB27.断开电子风扇线束接插件FB27。
4. Use a digital multimeter to measure the resistance between pin 2 of FB27 and jack 87 on the fan relay base.用数字万用表测量FB27的2号针脚与风扇继电器底座的87号插孔之间的电阻。
Standard resistance value: <1标准电阻值：＜1 Ω
Are the test results normal?检查结果是否正常？
Yes是 Go to step 8.去步骤8。
No否 Repair or replace the electronic fan power harness.维修或更换电子风扇电源线束。
⑧Check electronic fan grounding harness检查电子风扇接地线束
Graphic
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Disconnect electronic fan harness connector FB27.断开电子风扇线束接插件FB27。
3. Use a digital multimeter to measure the resistance between pin 3 of FB27 and ground.用数字万用表测量FB27的3号针脚与接地之间的电阻。
Standard resistance value: <1标准电阻值：＜1 Ω
Are the test results normal?检查结果是否正常？
Yes是 Go to step 9.去步骤9。
No否 Repair or replace electronic fan ground harness.维修或更换电子风扇接地线束。
⑨Replace electronic fan更换电子风扇
1. Replace the electronic fan with a new one and check whether the fault code and symptoms are eliminated.更换新的电子风扇，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Go to step 10.去步骤10。
⑩Replacing the thermal management integrated module更换热管理集成模块
1. Replace the thermal management integrated module with a new one and check whether the fault code and symptoms are eliminated.更换新的热管理集成模块，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Look for causes from other symptoms.从其他症状查找原因。
  Caution:注意：
♦  After replacing the thermal management integrated module, you need to use a diagnostic instrument to recalibrate the thermal management integrated module.更换热管理集成模块后，需用诊断仪对热管理集成模块重新标定。