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.
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HOMESERVICE MANUALSHONDA2010CIVIC L4-1.8L CNGREPAIR AND DIAGNOSISSTARTING AND CHARGINGPOWER AND GROUND DISTRIBUTIONFUSE BLOCKSERVICE AND REPAIRUNDER-DASH FUSE/RELAY BOX REMOVAL/INSTALLATION
2010 Honda Civic L4-1.8L CNG
Under-dash Fuse/Relay Box Removal/Installation
2010 Honda Civic L4-1.8L CNGSECTION Under-dash Fuse/Relay Box Removal/Installation
Under-dash Fuse/Relay Box Removal and Installation
Special Tools Required
- Relay puller 07AAC-000A1A0
NOTE: SRS components are located in this area. Review the SRS component locations 4-door, Locations 2-door and precautions and procedures Service and Repair before doing repairs or servicing.
Removal
1. Do the battery terminal disconnection procedure. Procedures
2. Remove the driver's dashboard lower cover. Driver's Dashboard Lower Cover Removal/Installation
3. Disconnect the connectors from the fuse side of the under-dash fuse/relay box (A).
4. Remove the mounting bolt (B), and pull the fuse/relay box away from the body.
5. Disconnect the connectors from the back side of the under-dash fuse/relay box, then remove the under-dash fuse/relay box.
6. Carefully remove the relays using the relay puller.
NOTE: Do not use pliers. Pliers will damage the relays, which could cause the engine to stall or not start.
Installation
7. Install the relays and connect the connectors to the under-dash fuse/relay box, then install the under-dash fuse/relay box in the reverse order of removal.
8. Install the removed parts in the reverse order of removal.
9. Do the battery terminal reconnection procedure. Procedures
10. If the under-dash fuse/relay box is replaced, register the immobilizer system with the HDS. Programming and Relearning
NOTE: The imoes unit is built into the MICU which is part of the under-dash fuse/relay box. You must register the imoes unit when replacing the under-dash fuse/relay box, or the vehicle will not start.
11. Confirm that all systems work properly.
RENDER: 1.0x
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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.