Ignition Control Module (ICM) Input Test (CR-V)
WARNING: This page is about a different car, the 2000 Honda Prelude, 2000 Honda Civic, and 2000 Honda CR-V. However, it is still accessible from the selected car via links, so may be relevant.
- 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 for open in Black/Yellow wire between ignition switch and ICM. See WIRING DIAGRAMS article.
- Ensure ignition is on. Check for voltage between ground and White/Blue wire. If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. See INTERNAL IGNITION COIL RESISTANCE TEST (ACCORD 2.3L, CIVIC & CR-V) . Replace ignition coil as necessary. If ignition coil is okay, check for open in White/Blue wire between ICM and ignition coil.
- Disconnect PCM 25-pin connector "B". Check for continuity in Yellow/Green wire between ICM and PCM 25-pin harness connector "B" terminal No. 13. If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.
- Check for continuity between ground and PCM 25-pin harness connector "B" terminal No. 13 (Yellow/Green wire). If continuity exists, check for short to ground in Yellow/Green wire. If continuity does not exist and wiring is okay at this time, replace ICM.