EV Diagnostics
Verified EV diagnostic knowledge page

Mitsubishi B1407

52B-004 Page 8 of 22 TSB-18-52B-004 Please make the indicated changes to the 2016 and 2017 i-MiEV Service Manual, Group 52B - Supplemental Restraint System (SRS) -> SRS Air Bag Dia

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Mitsubishi-qualified service facility for diagnosis using the corrected SRS manual information applicable to the vehicle.
Confidence95%

Quick answer

B1407 is documented in official Mitsubishi service-manual correction bulletins as an SRS air-bag diagnostic trouble code procedure requiring corrected diagnosis information. The supplied evidence does not establish the specific fault meaning, symptoms, drivability, charging status, or repair.

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

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

DTC Mitsubishi B1407 Short ExplanationMaxidot Fiat

Videos are supporting material and never override OEM or regulator evidence.

1. What does B1407 mean?

B1407 is documented in official Mitsubishi service-manual correction bulletins as an SRS air-bag diagnostic trouble code procedure requiring corrected diagnosis information. The supplied evidence does not establish the specific fault meaning, symptoms, drivability, charging status, or repair.

2. Technical explanation

For Mitsubishi i-MiEV vehicles covered by the listed bulletins, B1407 appears under Group 52B, Supplemental Restraint System (SRS), SRS Air Bag Diagnosis, Diagnostic Trouble Code Procedures <SRS-ECU>. Mitsubishi issued TSB-18-52B-002, TSB-18-52B-003, and TSB-18-52B-004 to replace incorrect service-manual information with correct information for B1407 diagnosis. The exact corrected diagnostic content is not included in the supplied evidence.

3. What system is affected?

Supplemental Restraint System (SRS), including SRS air-bag diagnosis and the SRS-ECU diagnostic procedure.

4. How serious is this code?

Unknown. The supplied evidence identifies an SRS-related diagnostic procedure but does not assign a severity level.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • 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

  • Arrange diagnosis using the applicable Mitsubishi SRS service information.
  • Do not attempt air-bag or SRS-ECU repair based solely on this code-page evidence.

10. Step-by-step troubleshooting

  1. Confirm the vehicle year and market applicability before using a bulletin.
  2. Use the corrected B1407 diagnostic procedure in the applicable Group 52B SRS Air Bag Diagnosis service manual information.
  3. The supplied evidence does not provide the actual diagnostic steps, test values, component checks, or repair instructions.

11. When to contact service

Contact a Mitsubishi-qualified service facility for diagnosis using the corrected SRS manual information applicable to the vehicle.

12. What the service center may check

  • Verify B1407 in the SRS-ECU.
  • Determine which applicable Mitsubishi service-manual correction bulletin applies by model year and market.
  • Follow the corrected B1407 diagnosis information referenced by the bulletin. The detailed procedure is not contained in the supplied evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • TSB-18-52B-002: Official Mitsubishi/NHTSA manufacturer communication published December 20, 2018. It directs replacement of incorrect information with correct information for B1407 diagnosis in the 2012 i-MiEV Group 52B SRS Air Bag Diagnosis manual section.
  • TSB-18-52B-003: Official Mitsubishi/NHTSA manufacturer communication published December 20, 2018. It directs replacement of incorrect information with correct information for B1407 diagnosis in the 2013 (Canada only) and 2014 i-MiEV Group 52B SRS Air Bag Diagnosis manual section.
  • TSB-18-52B-004: Official Mitsubishi/NHTSA manufacturer communication published December 20, 2018. It directs replacement of incorrect information with correct information for B1407 diagnosis in the 2016 and 2017 i-MiEV Group 52B SRS Air Bag Diagnosis manual section.

16. Recall information

  • No recall information is established by the supplied evidence.

17. Official manufacturer information

Official NHTSA-hosted Mitsubishi manufacturer communications: TSB-18-52B-002 (https://static.nhtsa.gov/odi/tsbs/2018/MC-10152960-9999.pdf), TSB-18-52B-003 (https://static.nhtsa.gov/odi/tsbs/2018/MC-10152959-9999.pdf), and TSB-18-52B-004 (https://static.nhtsa.gov/odi/tsbs/2018/MC-10152961-9999.pdf).

19. Frequently asked questions

What system is associated with B1407?

Verified evidence places B1407 in Mitsubishi i-MiEV Group 52B Supplemental Restraint System (SRS), within SRS Air Bag Diagnosis and SRS-ECU diagnostic trouble code procedures.

What does B1407 specifically mean?

Not yet established by verified evidence. The supplied sources confirm corrected diagnostic information exists but do not include the code’s specific fault definition.

Which vehicles are covered by the supplied bulletins?

The supplied evidence identifies 2012 i-MiEV; 2013 i-MiEV (Canada only) and 2014 i-MiEV; and 2016–2017 i-MiEV. Applicability records supplied with this page identify US-market 2012, 2013–2014, and 2016–2017 i-MiEV entries, while the TSB-18-52B-003 summary specifically describes 2013 as Canada only.

Is B1407 covered by a recall?

No recall information is established by the supplied evidence.

20. Sources & verification

Verified
Mitsubishi B1407: 52B-004 Page 8 of 22 TSB-18-52B-004 Please make the… | EV Diagnostics