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Mitsubishi U111C

SAFE AND BACKUP FUNCTION  When the K-LINE is normal, use the K-LINE communication data. . PROBABLE CAUSES  The EV-ECU is failed.  The harnesses and the connectors of the CAN bus

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceProfessional Mitsubishi EV service is appropriate because the verified diagnostic procedure calls for CAN bus diagnosis with Mitsubishi scan tool MB991958.
Confidence95%

Quick answer

For a 2016 Mitsubishi i-MiEV sold in the US, DTC U111C is identified in the supplied Mitsubishi service-bulletin evidence as “BMU CAN Timeout.” The EV-ECU may use K-LINE communication data as a backup when K-LINE communication is normal.

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 U111C mean?

For a 2016 Mitsubishi i-MiEV sold in the US, DTC U111C is identified in the supplied Mitsubishi service-bulletin evidence as “BMU CAN Timeout.” The EV-ECU may use K-LINE communication data as a backup when K-LINE communication is normal.

2. Technical explanation

The verified evidence describes U111C as a BMU CAN timeout condition set in the EV-ECU. The listed backup strategy is: when K-LINE is normal, use K-LINE communication data. The bulletin’s diagnostic process begins with CAN bus line diagnosis using scan tool MB991958.

3. What system is affected?

EV-ECU communication with the BMU over the CAN bus; K-LINE is identified as the backup communication path when normal.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A U111C / BMU CAN Timeout diagnostic trouble code may be stored in the EV-ECU.
  • Additional driver-visible symptoms are not yet established by verified evidence.

6. Possible causes

  • EV-ECU failure.
  • Failure of CAN bus harnesses or connectors.
  • BMU failure.

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 component repair based on this code alone.
  • Have the vehicle evaluated with appropriate Mitsubishi diagnostic equipment.
  • Preserve any stored DTCs and note whether the code occurs after the electric motor switch is turned ON or after main drive lithium-ion battery charging begins.

10. Step-by-step troubleshooting

  1. Verify the DTC with a compatible scan tool.
  2. Perform CAN bus line diagnosis using scan tool MB991958, as specified in the verified bulletin.
  3. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Professional Mitsubishi EV service is appropriate because the verified diagnostic procedure calls for CAN bus diagnosis with Mitsubishi scan tool MB991958.

12. What the service center may check

  • Scan for EV-ECU diagnostic trouble codes.
  • Perform CAN bus line diagnosis using scan tool MB991958.
  • Evaluate the EV-ECU, CAN bus harnesses/connectors, and BMU as listed probable-cause areas.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletin identifies diagnostic areas and probable causes but does not provide a verified repair outcome in the supplied evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication PDF 10158410. It identifies U111C as “BMU CAN Timeout” in the EV-ECU diagnostic context and specifies CAN bus line diagnosis with MB991958.

16. Recall information

  • No recall information is established by the supplied verified evidence.

17. Official manufacturer information

Verified official source: NHTSA-hosted Mitsubishi Manufacturer Communication PDF 10158410, TSB-19-54-005: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

19. Frequently asked questions

What does U111C mean on the applicable Mitsubishi i-MiEV?

The supplied verified evidence identifies U111C as BMU CAN Timeout in the EV-ECU.

Which vehicle is covered by the supplied applicability evidence?

2016 Mitsubishi i-MiEV, US region.

What backup function is stated for this condition?

When K-LINE is normal, the EV-ECU uses K-LINE communication data.

What causes are listed in the bulletin?

The bulletin lists the EV-ECU, CAN bus harnesses/connectors, and BMU as probable-cause areas.

Is it safe to drive or charge with U111C?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi U111C: SAFE AND BACKUP FUNCTION  When the K-LINE is… | EV Diagnostics