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 MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 177 (MULTIPLEX INTEGRATED CONTROL SYSTEM)RELAY CONTROL MODULE INPUT TEST
2002 Honda Civic Si
Relay Control Module Input Test
2002 Honda Civic SiSECTION Relay Control Module Input Test
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the under-hood fuse/relay box under cover (see UNDER-HOOD FUSE/RELAY BOX ).
- Disconnect the under-hood fuse/relay box connector K (10P).
- 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 4.
- Reconnect the connector to the under-hood fuse/relay box, 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 relay control module must be faulty, replace the under-hood fuse/relay box.
POSSIBLE CAUSECavity Wire Test condition Test: Desired result Possible cause if result is not obtained K10 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. - Poor ground (G202)
- An open in the wire
K2 YEL Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. - Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
K8 BLU Under all conditions Check for continuity between K8 terminal and the driver's under-dash fuse/relay box connector D (17P) No. 11 terminal:
There should be continuity.An open in the wire
RENDER: 1.0x
NO RELATED
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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.