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.
2012 Honda Insight BaseFACTORY OEM SERVICE PROCEDURE
Keyless/Power Door Locks/Security System
- Component Location Index
- System Description
- Circuit Diagram
- DTC Troubleshooting
- DTC B1127: Driver's Door Key Cylinder Switch Input Circuit Malfunction (Simultaneous input of lock and unlock signal)
- DTC B1128: Driver's Door Remote Switch Input Circuit Malfunction (Simultaneous input of lock and unlock signal)
- DTC B1129: Driver's Door Lock Knob Switch Input Circuit Malfunction (Simultaneous input of lock and unlock signal)
- Symptom Troubleshooting Index
- Symptom Troubleshooting
- Doors automatically relock 30 seconds after being unlocked with the transmitter even though a door has been opened
- Keyless operation does not work (LOCK, UNLOCK, PANIC)
- Doors will not unlock (or lock) with the transmitter, but will unlock (or lock) with the door lock switch and the door key cylinder switch
- The horn does not sound and/or the headlights do not flash when the PANIC button on the transmitter is pressed
- Security alarm system will not arm
- Hatch latch switch circuit troubleshooting
- Security hood switch circuit troubleshooting
- Driver's door lock knob switch circuit troubleshooting
- Front passenger's door lock knob switch circuit troubleshooting
- Left rear door lock knob switch circuit troubleshooting
- Right rear door lock knob switch circuit troubleshooting
- Driver's door switch circuit troubleshooting
- Front passenger's door switch circuit troubleshooting
- Left rear door switch circuit troubleshooting
- Right rear door switch circuit troubleshooting
- Driver's door key cylinder switch circuit troubleshooting
- MICU Input Test
- Door Lock Actuator Test
- Door Lock Knob Switch Test
- Door Key Cylinder Switch Test
- Driver's Door Lock Switch Test
- Hatch Release Actuator Test
- Security Hood Switch Test
- Hatch Outer Handle Switch Test/Replacement
- Transmitter Test
- Tripped Sensor History
Factory Service Tools
Use the Manual With the Right Hardware
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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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