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Mitsubishi U11A4

CMU05 time-out, U11A5: CMU06 time-out, U11A6: CMU07 time-out, U11A7: CMU08 time-out, U11A8: CMU09 time-out, U11A9: CMU10 time-out, U11AA: CMU11 time-out, U11AB: CMU12 time-out . M

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not yet established by verified evidence. Because this code concerns the Main Drive Lithium-ion Battery/BMU diagnostic system, seek qualified Mitsubishi or EV service diagnosis rather than attempting high-voltage work.
Confidence95%

Quick answer

U11A4 is identified in verified Mitsubishi service information as a CMU05 time-out (also described as CMU05 CAN Timeout). It is applicable to specified U.S. 2012, 2014, and 2016 Mitsubishi i-MiEV vehicles.

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 U11A4 mean?

U11A4 is identified in verified Mitsubishi service information as a CMU05 time-out (also described as CMU05 CAN Timeout). It is applicable to specified U.S. 2012, 2014, and 2016 Mitsubishi i-MiEV vehicles.

2. Technical explanation

Verified Mitsubishi technical-service information describes U11A4 as a timeout involving CMU05. The diagnostic check condition stated in the available evidence is that three seconds have elapsed after the electric motor switch is turned ON, or three seconds have elapsed after the Main Drive Lithium-ion Battery condition referenced by the bulletin. The supplied evidence does not establish a complete fault-cause list, driving consequence, or repair procedure for this page.

3. What system is affected?

CMU05 and the Main Drive Lithium-ion Battery/Battery Management Unit diagnostic system are referenced by the verified Mitsubishi service information.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored or set U11A4 diagnostic trouble code may be present.
  • Other symptoms are not yet established by verified evidence.

6. Possible causes

  • A CMU05 time-out or CMU05 CAN Timeout condition is identified by verified Mitsubishi service information.
  • Underlying causes are not yet established by verified evidence.

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

  • Record the code and any accompanying diagnostic trouble codes.
  • Arrange diagnosis by a Mitsubishi-qualified service facility or an EV-qualified technician using appropriate manufacturer procedures.
  • Do not attempt high-voltage battery, CMU, or battery-management-system repairs yourself.

10. Step-by-step troubleshooting

  1. Verified Mitsubishi bulletin logic instructs a technician to erase stored diagnostic trouble codes, turn the electric motor switch from LOCK (OFF) to ON, and confirm whether the code returns.
  2. If U11A4 is no longer stored or set after that check, the supplied bulletin excerpt states that the check is complete.
  3. If U11A4 remains stored or set, further diagnostic steps are referenced by the bulletin, but those steps are not included in the supplied verified evidence.

11. When to contact service

Service need is not yet established by verified evidence. Because this code concerns the Main Drive Lithium-ion Battery/BMU diagnostic system, seek qualified Mitsubishi or EV service diagnosis rather than attempting high-voltage work.

12. What the service center may check

  • Confirm whether U11A4 is stored or set after clearing the code and cycling the electric motor switch from LOCK (OFF) to ON, following Mitsubishi service information.
  • Review all accompanying codes; additional service checks are not yet established by the supplied verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-004, published March 13, 2019, identifies U11A4 as CMU05 time-out.
  • Mitsubishi TSB-19-54-005, published March 13, 2019, identifies U11A4 as CMU05 CAN Timeout.
  • Mitsubishi TSB-19-54-003, published March 13, 2019, identifies U11A4 as CMU05 time-out.

16. Recall information

  • No recall information was supplied as verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Mitsubishi manufacturer communications: TSB-19-54-004 (MC-10158409), TSB-19-54-005 (MC-10158410), and TSB-19-54-003 (MC-10158408), all published March 13, 2019.

19. Frequently asked questions

What does Mitsubishi code U11A4 mean?

Verified Mitsubishi service information identifies U11A4 as CMU05 time-out, also described as CMU05 CAN Timeout.

Which vehicles are covered by the supplied applicability data?

The supplied verified applicability data lists U.S.-market Mitsubishi i-MiEV models for model years 2012, 2014, and 2016.

Can I drive or charge with U11A4?

Not yet established by verified evidence.

What is the documented initial diagnostic check?

The supplied Mitsubishi bulletin excerpts instruct clearing the code, switching the electric motor switch from LOCK (OFF) to ON, and checking whether U11A4 returns.

20. Sources & verification

Verified
Mitsubishi U11A4: CMU05 time-out, U11A5: CMU06 time-out, U11A6: CMU07… | EV Diagnostics