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Mitsubishi U1082

Local CAN (for Main Drive Lithium-ion Battery) bus off Judgment Criterion  For more than 3 seconds, one of the CMU signals cannot be received t hrough the CAN communication. . FAI

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not explicitly established by the supplied evidence; however, the documented probable causes involve the main drive lithium-ion battery, CMUs, and their local CAN wiring/connectors. Diagnosis should be performed by a qualified Mitsubishi EV service provider.
Confidence95%

Quick answer

U1082 is a Mitsubishi i-MiEV diagnostic trouble code for a local CAN communication bus-off condition involving the main drive lithium-ion battery. It sets when a signal from one CMU cannot be received through CAN communication for more than 3 seconds.

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 U1082 mean?

U1082 is a Mitsubishi i-MiEV diagnostic trouble code for a local CAN communication bus-off condition involving the main drive lithium-ion battery. It sets when a signal from one CMU cannot be received through CAN communication for more than 3 seconds.

2. Technical explanation

Verified Mitsubishi service-bulletin evidence describes U1082 as: “Local CAN (for Main Drive Lithium-ion Battery) bus off.” The judgment criterion is that, for more than 3 seconds, one CMU signal cannot be received through CAN communication. The listed check conditions include three seconds after the electric motor switch is turned ON, or three seconds after the main drive lithium-ion battery starts charging.

3. What system is affected?

Main drive lithium-ion battery local CAN communication, including CMUs (battery monitoring modules), associated harnesses, and connectors.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A U1082 diagnostic trouble code may be stored when a CMU signal cannot be received through CAN communication for more than 3 seconds.
  • Additional driver-visible symptoms are not yet established by verified evidence.

6. Possible causes

  • Failure of a CMU in the main drive lithium-ion battery.
  • Failure of harnesses or connectors for the local CAN communication circuit of the main drive lithium-ion battery.

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

  • Arrange diagnosis by a qualified Mitsubishi EV service provider.
  • Do not attempt high-voltage battery, CMU, local CAN harness, or connector repairs yourself.
  • Record whether the code occurred after switching the electric motor system ON or after charging began, if that information is available.

10. Step-by-step troubleshooting

  1. Verified service information identifies CMU failure and local CAN harness or connector failure as probable causes.
  2. Specific step-by-step diagnostic testing procedures are not established by the supplied verified evidence.

11. When to contact service

Service need is not explicitly established by the supplied evidence; however, the documented probable causes involve the main drive lithium-ion battery, CMUs, and their local CAN wiring/connectors. Diagnosis should be performed by a qualified Mitsubishi EV service provider.

12. What the service center may check

  • Check for failure of a CMU in the main drive lithium-ion battery.
  • Check the harnesses and connectors for the local CAN communication circuit of the main drive lithium-ion battery.

13. Possible repair or resolution

  • The supplied evidence does not establish a specific repair resolution. Repair depends on the confirmed fault in the CMU, local CAN harness, or connector.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-003, published March 13, 2019; available through NHTSA as MC-10158408: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
  • Mitsubishi TSB-19-54-004, published March 13, 2019; available through NHTSA as MC-10158409: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf
  • Mitsubishi TSB-19-54-005, published March 13, 2019; available through NHTSA as MC-10158410: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official NHTSA-hosted Mitsubishi service information applies this evidence to US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016. The evidence describes U1082 and lists probable causes, but does not establish driving safety, charging safety, severity, a recall, or a universal repair.

19. Frequently asked questions

What does Mitsubishi U1082 mean?

It means the local CAN system for the main drive lithium-ion battery has a bus-off communication condition. The code criterion is loss of one CMU signal through CAN communication for more than 3 seconds.

When can U1082 be judged?

The verified information lists conditions of three seconds after the electric motor switch is turned ON, or three seconds after main drive lithium-ion battery charging starts.

What can cause U1082?

Verified probable causes are a failed CMU in the main drive lithium-ion battery or failed local CAN harnesses/connectors for that battery.

Can I drive or charge with U1082?

Not yet established by verified evidence.

Which vehicles are supported by the supplied evidence?

US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016.

20. Sources & verification

Verified
Mitsubishi U1082: Local CAN (for Main Drive Lithium-ion Battery) bus… | EV Diagnostics