Mitsubishi B1408
52B-004 Page 10 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
Quick answer
B1408 is documented in Mitsubishi i-MiEV SRS air-bag diagnostic material. Verified evidence shows Mitsubishi issued service-manual corrections for the B1408 diagnostic procedure; it does not establish the fault meaning, cause, symptom, repair, or driving/charging status.
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 B1408 mean?
B1408 is documented in Mitsubishi i-MiEV SRS air-bag diagnostic material. Verified evidence shows Mitsubishi issued service-manual corrections for the B1408 diagnostic procedure; it does not establish the fault meaning, cause, symptom, repair, or driving/charging status.
2. Technical explanation
The supplied official NHTSA manufacturer-communication records identify B1408 under Group 52B, Supplemental Restraint System (SRS), SRS Air Bag Diagnosis, Diagnostic Trouble Code Procedures <SRS-ECU>. The records state that incorrect information was to be replaced with correct information for diagnosis of B1408 and B1409. The actual corrected diagnostic content is not included in the supplied evidence.
3. What system is affected?
Supplemental Restraint System (SRS), specifically SRS air-bag diagnosis and the SRS-ECU diagnostic trouble-code 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. A diagnostic identifier alone is not proof that a specific component has failed.
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 i-MiEV SRS service information.
- Do not attempt air-bag or SRS component repairs based on the supplied evidence.
10. Step-by-step troubleshooting
- Use the corrected B1408 diagnostic procedure specified by the applicable Mitsubishi service-manual update. The detailed procedure is not present in the supplied evidence.
- For 2016–2017 US i-MiEV models, consult TSB-18-52B-004.
- For 2012 US i-MiEV models, consult TSB-18-52B-002.
- For 2013–2014 i-MiEV coverage described in the supplied evidence, consult TSB-18-52B-003; its summary specifies 2013 Canada-only and 2014 manual corrections.
11. When to contact service
Contact a Mitsubishi dealer or qualified service provider for SRS diagnosis using the corrected applicable procedure. The supplied evidence does not establish urgency or whether the vehicle may be driven.
12. What the service center may check
- Retrieve SRS-ECU diagnostic information and apply the corrected B1408 diagnostic procedure in the applicable manual update.
- Confirm model year and market before selecting the bulletin/manual update.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied records confirm a correction to diagnostic information, not a specific repair.
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: corrects 2016 and 2017 i-MiEV Service Manual information in Group 52B, SRS Air Bag Diagnosis, for B1408 and B1409 diagnosis. Source: NHTSA manufacturer communication MC-10152961, https://static.nhtsa.gov/odi/tsbs/2018/MC-10152961-9999.pdf
- TSB-18-52B-002, published December 20, 2018: corrects 2012 i-MiEV Service Manual information in Group 52B, SRS Air Bag Diagnosis, for B1408 and B1409 diagnosis. Source: NHTSA manufacturer communication MC-10152960, https://static.nhtsa.gov/odi/tsbs/2018/MC-10152960-9999.pdf
- TSB-18-52B-003, published December 20, 2018: corrects Group 52B SRS Air Bag Diagnosis information for B1408 and B1409 in the 2013 (Canada only) and 2014 i-MiEV Service Manual material described by the source. Source: NHTSA manufacturer communication MC-10152959, https://static.nhtsa.gov/odi/tsbs/2018/MC-10152959-9999.pdf
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified sources are NHTSA-hosted Mitsubishi manufacturer communications published December 20, 2018. They document service-manual diagnostic corrections rather than a recall or a confirmed component failure.
19. Frequently asked questions
What system is associated with B1408?
Verified evidence places B1408 in Mitsubishi i-MiEV Group 52B Supplemental Restraint System (SRS) air-bag diagnostic procedures for the SRS-ECU.
What does B1408 mean?
Not yet established by verified evidence. The supplied material identifies a corrected diagnostic procedure but does not provide the DTC definition.
Is there a bulletin for B1408?
Yes. The supplied official records identify TSB-18-52B-002, TSB-18-52B-003, and TSB-18-52B-004 as service-manual updates involving B1408 diagnosis for specified i-MiEV model years and markets.
Is B1408 a recall?
Not yet established by verified evidence. The supplied sources are manufacturer communications/service-manual updates, and no recall is identified.