Ignition Control Module Input Test (Oasis & Odyssey 2.3L)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1999 Isuzu Oasis, 1998 Isuzu Oasis, 1998 Honda Prelude, 1998 Honda Odyssey, and 1998 Honda Civic. 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 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.