Several steps to diagnose the fault code of the power system of Changan UNI-T new energy vehicles

1. Read the fault code:

• Use a professional car diagnostic instrument to connect to the control system of Changan UNI-T through the OBDⅡ diagnostic interface.
• Read and record the fault code stored in the vehicle’s internal computer system. The fault code of Changan UNI-T may include codes starting with P0, P1, P2, etc., and each code corresponds to a specific fault description.

2. Analyze the fault code:

• According to the fault code read, refer to the relevant fault code explanation information or the official information provided by Changan Automobile to understand the specific meaning of the fault code and the possible cause of the fault.
• For example, P0676 may indicate that the cylinder 6 glow plug circuit/open circuit, while P0B99 may indicate that the hybrid battery voltage monitoring S circuit is intermittent/unstable.

3. Check related components:

• According to the fault area indicated by the fault code, check the related components. This may include checking the battery pack, motor, controller, sensor, etc.
• Check whether the related components are damaged, open circuit, short circuit, poor contact, etc.

4.Confirm the cause of the fault:

• Combine the fault phenomenon and inspection results to confirm the specific cause of the fault.
• Further testing or analysis may be required, such as measuring parameters such as voltage, current, temperature, or conducting a road test to observe the fault phenomenon.

5. Troubleshooting:

• Take appropriate repair measures according to the cause of the fault. This may include replacing damaged parts, repairing circuits, adjusting parameters, etc.
• During the repair process, professional tools and equipment may need to be used, such as multimeters, oscilloscopes, oscilloscopes, etc.

6.Inspection and debugging:

• After troubleshooting, further inspect and debug the vehicle to ensure that the fault has been completely eliminated.
• This may include re-reading the fault code, checking the working status of related components, and conducting a road test to verify the repair effect.

7. Record and feedback:

• Record the diagnostic process and repair results for future reference.
• If you cannot solve the fault yourself, you may need to contact Changan Automobile Official After-sales Service or professional car repair personnel for help.
  Please note that the above steps are for reference only, and the specific diagnostic process may vary depending on the model, configuration and fault condition. When performing diagnosis, it is recommended to follow relevant safety regulations and operating guidelines to ensure personal safety and vehicle safety.