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Mitsubishi U11A7

CMU08 time-out, U11A8: CMU09 time-out, U11A9: CMU10 time-out, U11AA: CMU11 time-out, U11AB: CMU12 time-out . M S B - 1 7 M 5 4 _ 5 5 - 0 0 1 ( 1 7 A B 0 3 7 ) 1 6 1 BATTERY MANAGEM

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceProfessional EV service is appropriate because U11A7 concerns the Battery Management Unit and main drive lithium-ion battery system. Urgency is not yet established by verified evidence.
Confidence95%

Quick answer

U11A7 is a Mitsubishi i-MiEV diagnostic trouble code for a CMU08 time-out/CAN time-out. Official Mitsubishi service-bulletin evidence states it is evaluated about 3 seconds after the electric motor switch is turned ON or about 3 seconds after main drive lithium-ion battery charging begins.

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 U11A7 mean?

U11A7 is a Mitsubishi i-MiEV diagnostic trouble code for a CMU08 time-out/CAN time-out. Official Mitsubishi service-bulletin evidence states it is evaluated about 3 seconds after the electric motor switch is turned ON or about 3 seconds after main drive lithium-ion battery charging begins.

2. Technical explanation

CMU08 refers to the eighth battery Cell Monitoring Unit identified in the supplied Mitsubishi diagnostic material. The supplied official bulletins group U11A7 with U11A0 through U11AB, which correspond to time-out or CAN time-out faults for CMU01 through CMU12. The supplied evidence does not establish a more specific failed part or root cause for U11A7.

3. What system is affected?

Battery Management Unit (BMU) and main drive lithium-ion battery system; specifically, communications with CMU08.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A U11A7 diagnostic trouble code may be stored or set.
  • The code is checked approximately 3 seconds after the electric motor switch is turned ON or approximately 3 seconds after main drive lithium-ion battery charging begins.

6. Possible causes

  • A CMU08 time-out/CAN time-out condition is established by verified evidence.
  • A specific underlying cause is 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

  • Do not attempt high-voltage battery or battery-management repairs yourself.
  • Have the vehicle evaluated by a qualified Mitsubishi/EV service facility using the applicable diagnostic procedure.

10. Step-by-step troubleshooting

  1. Official bulletin evidence instructs confirmation of whether the diagnostic trouble code is stored or set after cycling the electric motor switch from LOCK (OFF) to ON.
  2. If U11A7 is present, continue with the applicable Mitsubishi diagnostic procedure. The detailed subsequent procedure is not included in the supplied evidence.

11. When to contact service

Professional EV service is appropriate because U11A7 concerns the Battery Management Unit and main drive lithium-ion battery system. Urgency is not yet established by verified evidence.

12. What the service center may check

  • Confirm whether U11A7 is stored or set after the electric motor switch is cycled from LOCK (OFF) to ON.
  • Apply the applicable Mitsubishi service-bulletin diagnostic procedure for CMU08 time-out/CAN time-out.

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-10158408-9999: identifies U11A7 as CMU08 time-out in Battery Management Unit and main drive lithium-ion battery diagnostic material.
  • Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409-9999: identifies U11A7 as CMU08 time-out.
  • Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410-9999: identifies U11A7 as CMU08 CAN time-out.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official NHTSA-hosted Mitsubishi communications: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

19. Frequently asked questions

What does Mitsubishi code U11A7 mean?

It means CMU08 time-out or CMU08 CAN time-out, according to the supplied official Mitsubishi bulletins.

When is U11A7 evaluated?

The supplied bulletins state the check condition occurs when 3 seconds have elapsed after the electric motor switch is turned ON, or 3 seconds have elapsed after the main drive lithium-ion battery starts charging.

Which vehicles are covered by the supplied applicability data?

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

Is it safe to drive or charge with U11A7?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi U11A7: CMU08 time-out, U11A8: CMU09 time-out, U11A9: CMU10… | EV Diagnostics