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 (ICM) INPUT TEST (PRELUDE 2.2L)
1998 Honda Civic DX, 2D Coupe, Automatic
Ignition Control Module (ICM) Input Test (Prelude 2.2L)
1998 Honda Civic DX, 2D Coupe, AutomaticSECTION Ignition Control Module (ICM) Input Test (Prelude 2.2L)
- Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. See Fig 8. Turn ignition on. Check for voltage between ground and ICM Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for an open in Black/Yellow wire between ignition switch and ICM.
- Turn ignition on. Check for voltage between ground and ICM Green wire (White/Black wire on Accord F22B1 engine). See Fig 8. 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 Green wire (White/Black wire on Accord F22B1 engine) between ICM and ignition coil.
- Turn ignition switch off. Disconnect PCM 32-pin "A" connector. Check for continuity in Yellow/Green wire between PCM 32-pin connector terminal A20 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 does not exist, go to next step. If continuity exists, repair short to ground in Yellow/Green wire.
- Reconnect PCM 32-pin connector "A" to PCM. Disconnect instrument cluster 22-pin (16-pin on Prelude) connector. Check for continuity in Blue wire between ICM and tachometer. If continuity exists, go to next step. If continuity does not exist, repair open in Blue wire.
- Check for continuity between ground and Blue wire. If continuity exists, repair short to ground in Blue wire. If continuity does not exist, wiring is okay. Reconnect instrument cluster connector. 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.