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.
2006 Honda Civic L4-1.3L HybridFACTORY OEM SERVICE PROCEDURE
Keyless Entry Module: Testing and Inspection
Immobilizer-keyless Control Unit Input Test
NOTE: Before troubleshooting the immobilizer system, troubleshoot the B-CAN System Diagnosis Test Mode A, and check the No. 10 (7.5 A) and No. 38 (30 A) fuses in the under-dash fuse/relay box.
1. Remove the drivers dashboard lower cover.
2. Remove the steering column covers.
3. Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).
4. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 5.
5. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.
6. Reconnect the connectors to the immobilizer-keyless control unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box.
NOTE: Before troubleshooting the immobilizer system, troubleshoot the B-CAN System Diagnosis Test Mode A, and check the No. 10 (7.5 A) and No. 38 (30 A) fuses in the under-dash fuse/relay box.
1. Remove the drivers dashboard lower cover.
2. Remove the steering column covers.
3. Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).
4. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 5.
5. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.
6. Reconnect the connectors to the immobilizer-keyless control unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box.
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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