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Home >> Isuzu >> 1998 >> Oasis LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Ignition Checks >> Ignition Control Module >> Ignition Control Module Input Test (Oasis & Odyssey 2.3L)
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Ignition Control Module Input Test (Oasis & Odyssey 2.3L)

  1. 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.
  2. 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 .
  3. 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.
  4. 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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