Mitsubishi B1428
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 Diagnosis -> Diagnostic Trouble
Quick answer
For Mitsubishi i-MiEV vehicles covered by the listed service-manual updates, DTC B1428 is addressed in Supplemental Restraint System (SRS) air-bag diagnostic procedures. Verified evidence establishes that Mitsubishi issued corrections to the B1428 diagnosis information in the service manuals; it does not establish the specific fault meaning, symptoms, cause, driving safety, charging safety, or repair.
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 B1428 mean?
For Mitsubishi i-MiEV vehicles covered by the listed service-manual updates, DTC B1428 is addressed in Supplemental Restraint System (SRS) air-bag diagnostic procedures. Verified evidence establishes that Mitsubishi issued corrections to the B1428 diagnosis information in the service manuals; it does not establish the specific fault meaning, symptoms, cause, driving safety, charging safety, or repair.
2. Technical explanation
NHTSA-hosted Mitsubishi manufacturer communications document corrections to Group 52B, Supplemental Restraint System (SRS), SRS Air Bag Diagnosis, Diagnostic Trouble Code Procedures under the SRS-ECU. The corrections apply to the diagnostic information for DTC B1428 (along with B1429) in the referenced i-MiEV service manuals. Because the supplied evidence provides only the bulletin summaries and not the corrected diagnostic content, the precise definition and diagnostic decision path for B1428 are not yet established by verified evidence.
3. What system is affected?
Supplemental Restraint System (SRS), including SRS air-bag diagnostic procedures and the SRS-ECU.
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
- Use the applicable corrected Mitsubishi i-MiEV Group 52B service-manual diagnostic information for DTC B1428.
- Have SRS diagnosis performed by qualified service personnel using manufacturer-approved procedures.
- Do not attempt air-bag or SRS component repair based on the supplied evidence.
10. Step-by-step troubleshooting
- Confirm the vehicle's model year and market applicability.
- Retrieve DTC B1428 from the SRS-ECU using appropriate diagnostic equipment.
- Refer to the corrected B1428 diagnosis procedure identified by the applicable Mitsubishi technical service bulletin.
- Not yet established by verified evidence: the individual test steps, expected values, component checks, and fault-confirmation criteria.
11. When to contact service
Qualified Mitsubishi service personnel should consult the applicable corrected SRS diagnostic procedure for DTC B1428. Service necessity is not yet established by verified evidence.
12. What the service center may check
- For 2012 US i-MiEV: consult TSB-18-52B-002, which identifies corrected B1428 and B1429 diagnosis information in Group 52B.
- For 2013 Canada-only and 2014 i-MiEV: consult TSB-18-52B-003, which identifies corrected B1428 and B1429 diagnosis information in Group 52B.
- For 2016 and 2017 US i-MiEV: consult TSB-18-52B-004, which identifies corrected B1428 and B1429 diagnosis information in Group 52B.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied evidence confirms service-manual diagnostic corrections, not a specific repair or replacement action.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
- Mitsubishi i-MiEV · 2013–2014 · US
- Mitsubishi i-MiEV · 2016–2017 · US
15. Related TSBs / service bulletins
- TSB-18-52B-004, published December 20, 2018: updates 2016 and 2017 i-MiEV Group 52B SRS Air Bag Diagnosis, including corrected diagnosis information for DTC B1428 and B1429. NHTSA document: https://static.nhtsa.gov/odi/tsbs/2018/MC-10152961-9999.pdf
- TSB-18-52B-002, published December 20, 2018: updates 2012 i-MiEV Group 52B SRS Air Bag Diagnosis, including corrected diagnosis information for DTC B1428 and B1429. NHTSA document: https://static.nhtsa.gov/odi/tsbs/2018/MC-10152960-9999.pdf
- TSB-18-52B-003, published December 20, 2018: updates 2013 Canada-only and 2014 i-MiEV Group 52B SRS Air Bag Diagnosis, including corrected diagnosis information for DTC B1428 and B1429. NHTSA document: https://static.nhtsa.gov/odi/tsbs/2018/MC-10152959-9999.pdf
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted Mitsubishi communications: TSB-18-52B-004 (2016-2017 i-MiEV), TSB-18-52B-002 (2012 i-MiEV), and TSB-18-52B-003 (2013 Canada-only and 2014 i-MiEV). The supplied applicability data identifies US 2012, 2013-2014, and 2016-2017 i-MiEV entries; the TSB summaries specifically describe 2013 as Canada-only in TSB-18-52B-003.
19. Frequently asked questions
What system is associated with B1428 in the supplied evidence?
The evidence places B1428 in Group 52B Supplemental Restraint System (SRS), under SRS Air Bag Diagnosis and SRS-ECU diagnostic trouble-code procedures.
What does B1428 specifically mean?
Not yet established by verified evidence. The supplied bulletins confirm that its diagnostic information was corrected, but do not provide the corrected fault definition.
Which i-MiEV model years are addressed by the listed bulletins?
TSB-18-52B-002 addresses 2012 i-MiEV; TSB-18-52B-003 addresses 2013 Canada-only and 2014 i-MiEV; and TSB-18-52B-004 addresses 2016 and 2017 i-MiEV.
Is B1428 a recall?
No recall is identified in the supplied verified evidence. The listed documents are manufacturer technical service bulletins/service-manual corrections.