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 MANUALSHONDA1998CIVIC DX, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESIGNITION CHECKSIGNITION CONTROL MODULEIGNITION CONTROL MODULE INPUT TEST (OASIS & ODYSSEY 2.3L)
1998 Honda Civic DX, 2D Coupe, Automatic
Ignition Control Module Input Test (Oasis & Odyssey 2.3L)
1998 Honda Civic DX, 2D Coupe, AutomaticSECTION Ignition Control Module Input Test (Oasis & Odyssey 2.3L)
- Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. See Figure. Turn ignition on. Check for voltage between ground and Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check Black/Yellow wire between ignition switch and ICM. See WIRING DIAGRAMS . Repair wire as necessary.
- Turn ignition on. Check for voltage between ground and White/Black wire. If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil. See IGNITION COIL RESISTANCE TEST . Replace coil as necessary. If ignition coil is okay, check for an open in White/Black wire between ICM and ignition coil. See WIRING DIAGRAMS .
- Turn ignition switch off. Disconnect PCM 25-pin "B" connector. Check for continuity in Yellow/Green wire between PCM 25-pin connector terminal B13 and ICM. See WIRING DIAGRAMS . If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
- Check for continuity between ground and Yellow/Green wire. If continuity exists, repair short to ground in Yellow/Green wire. If continuity does not exist and all other tests are okay, replace ICM.
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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.