Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2014 Honda FitFACTORY OEM SERVICE PROCEDURE
Immobilizer-Keyless Control Unit DTC Index
WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
Immobilizer-Keyless Control Unit
IMMOBILIZER-KEYLESS CONTROL UNIT DTC TROUBLESHOOTING TABLE
| DTC | Description | DTC type |
|---|---|---|
| B1900 | Communication bus line error (BUS-OFF) | Loss of communication |
| B1905 | Immobilizer-keyless control unit lost communication with MICU (DRLOCKSW message) | Loss of communication |
| B1906 | Immobilizer-keyless control unit lost communication with gauge control module (A/T message) | Loss of communication |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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