Ignition Control Module (ICM) Input Test
WARNING: This page is about a different variant/trim than selected.
- Turn ignition off. Remove distributor cap, rotor and leak cover. Disconnect wires from ICM. See Fig 1 . Turn ignition on. Check for voltage between ground and ICM Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil. Replace coil as necessary. If ignition coil is okay, check for an open in Yellow wire between ICM and ignition coil. See the WIRING DIAGRAMS - 2.7L article.
- Check for voltage between ground and ICM Green wire. If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil. Replace coil as necessary. If ignition coil is okay, check for an open in Green wire between ICM and ignition coil. See the WIRING DIAGRAMS - 2.7L article.
- Check Yellow/Green wire between PCM 26-pin connector "A" terminal A11 and ICM. Repair open or short in Yellow/Green wire as necessary. If wire is okay, replace ICM.