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Mitsubishi B1427

52B-004 Page 18 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 Di

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

Quick answer

DTC B1427 is referenced in Mitsubishi service-manual correction bulletins for the i-MiEV Supplemental Restraint System (SRS). The supplied evidence does not establish the code’s exact fault definition, symptoms, driving or charging status, or repair procedure.

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

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DTC Mitsubishi B1427 Short ExplanationMaxidot Fiat

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

1. What does B1427 mean?

DTC B1427 is referenced in Mitsubishi service-manual correction bulletins for the i-MiEV Supplemental Restraint System (SRS). The supplied evidence does not establish the code’s exact fault definition, symptoms, driving or charging status, or repair procedure.

2. Technical explanation

NHTSA-hosted Mitsubishi manufacturer communications TSB-18-52B-002, TSB-18-52B-003, and TSB-18-52B-004 instruct service-manual corrections to the SRS Air Bag Diagnosis section, specifically the SRS-ECU diagnostic-trouble-code procedures for B1427. The provided evidence confirms that B1427 belongs in this SRS diagnostic documentation context, but does not include the corrected diagnostic content itself.

3. What system is affected?

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

4. How serious is this code?

Not yet established by verified evidence.

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

  • Have the vehicle assessed using the applicable Mitsubishi i-MiEV SRS diagnostic information.
  • Do not attempt air-bag, SRS-ECU, or other restraint-system repairs without qualified service procedures.

10. Step-by-step troubleshooting

  1. Confirm the vehicle model year and market applicability before using a bulletin.
  2. Retrieve and document stored diagnostic trouble codes with appropriate diagnostic equipment.
  3. Use the corrected SRS-ECU diagnostic-trouble-code procedure referenced by the applicable Mitsubishi service-manual correction bulletin. The actual diagnostic steps are not included in the supplied evidence.

11. When to contact service

Contact a Mitsubishi dealer or qualified service provider for diagnosis using the applicable corrected SRS service-manual information.

12. What the service center may check

  • For US 2012 i-MiEV, consult TSB-18-52B-002, which identifies a correction to the SRS-ECU B1427 diagnostic procedure.
  • For 2013–2014 i-MiEV applicability supplied here, consult TSB-18-52B-003; its evidence summary specifically describes 2013 as Canada-only and 2014 i-MiEV service-manual corrections.
  • For US 2016–2017 i-MiEV, consult TSB-18-52B-004, which identifies a correction to the SRS-ECU B1427 diagnostic procedure.
  • Verify the exact corrected diagnostic content in the official bulletin/service information; it is not reproduced 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: NHTSA Manufacturer Communication PDF 10152960, published December 20, 2018. It updates 2012 i-MiEV SRS Air Bag Diagnosis information for DTC B1427.
  • TSB-18-52B-003: NHTSA Manufacturer Communication PDF 10152959, published December 20, 2018. It updates 2013 (Canada only) and 2014 i-MiEV SRS Air Bag Diagnosis information for DTC B1427.
  • TSB-18-52B-004: NHTSA Manufacturer Communication PDF 10152961, published December 20, 2018. It updates 2016 and 2017 i-MiEV SRS Air Bag Diagnosis information for DTC B1427.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Mitsubishi 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); TSB-18-52B-004 (https://static.nhtsa.gov/odi/tsbs/2018/MC-10152961-9999.pdf).

19. Frequently asked questions

What system is associated with B1427 in the supplied evidence?

The supplied Mitsubishi bulletin evidence places B1427 in the Supplemental Restraint System (SRS) Air Bag Diagnosis section and identifies the SRS-ECU diagnostic-trouble-code procedures.

Which i-MiEV years are covered by the supplied bulletins?

The supplied applicability data lists US 2012, 2013–2014, and 2016–2017 i-MiEV vehicles. The TSB-18-52B-003 evidence summary further states that its 2013 coverage is Canada only.

Does the evidence state what B1427 means?

No. The supplied evidence confirms a correction to the diagnostic procedure for B1427 but does not provide the exact fault definition.

Is B1427 covered by a recall?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi B1427: 52B-004 Page 18 of 22 TSB-18-52B-004 Please make the… | EV Diagnostics