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Mitsubishi U1925

CMU ID numbering reception error . TROUBLE JUDGMENT Check Conditions  When the CMUs are numbered for identification. ACC07057 C-21 (GR) AQ CMU01 to 05 (B) CMU07 CMU06 CMU12 CMU08

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceProfessional Mitsubishi EV diagnosis is appropriate if U1925 returns after the official erase-and-recheck procedure. Service-required status is not yet established by verified evidence.
Confidence95%

Quick answer

U1925 is a Mitsubishi i-MiEV Battery Management Unit (BMU) diagnostic trouble code for a CMU ID numbering reception error. Verified evidence applies to U.S. 2012 and 2014 i-MiEV models.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does U1925 mean?

U1925 is a Mitsubishi i-MiEV Battery Management Unit (BMU) diagnostic trouble code for a CMU ID numbering reception error. Verified evidence applies to U.S. 2012 and 2014 i-MiEV models.

2. Technical explanation

The official Mitsubishi diagnostic material states that U1925 is evaluated when the CMUs are numbered for identification. The code can be set when, within 5 seconds after the system numbers a CMU, it cannot receive information related to that identification number from the CMU, or when a parity error is detected in communication data.

3. What system is affected?

Battery Management Unit (BMU) communication with CMUs during CMU identification numbering.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • The BMU cannot receive information pertaining to a CMU identification number within 5 seconds after the system numbers that CMU.
  • A parity error is detected in communication data.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Have the code evaluated using the Mitsubishi diagnostic procedure.
  • Do not attempt high-voltage battery or CMU repair without qualified EV service training and equipment.

10. Step-by-step troubleshooting

  1. Official procedure: reconfirm whether the DTC is stored in the BMU.
  2. Erase the stored DTCs.
  3. Turn the electric motor switch from LOCK (OFF) to ON.
  4. Confirm whether the DTC is stored again.
  5. If U1925 is stored again, the official procedure directs the technician to continue diagnostic steps. If it is not stored, the check is complete.

11. When to contact service

Professional Mitsubishi EV diagnosis is appropriate if U1925 returns after the official erase-and-recheck procedure. Service-required status is not yet established by verified evidence.

12. What the service center may check

  • Confirm whether U1925 is stored in the BMU after clearing codes and cycling the electric motor switch from LOCK (OFF) to ON.
  • Evaluate BMU-to-CMU identification-number communication and communication-data parity according to the official Mitsubishi diagnostic procedure.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408.
  • Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Mitsubishi material: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf and https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf

19. Frequently asked questions

What does U1925 mean?

It means CMU ID numbering reception error. The official material identifies it as a BMU diagnostic trouble code.

When does U1925 set?

It is checked when CMUs are numbered for identification. It may set if identification-related information is not received from a CMU within 5 seconds after numbering, or if a communication-data parity error is detected.

Which vehicles are verified as applicable?

U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles are verified as applicable.

Can I drive or charge with U1925?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi U1925: CMU ID numbering reception error . TROUBLE JUDGMENT… | EV Diagnostics