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Home › Oldsmobile › 1998 › Achieva 2.4 T, 4T40E/MN4 › Repair and Diagnosis (Single Page) › Engine Performance › Remove, Overhaul & Install › Engine Controls - Remove/Install/Overhaul - 2.4L › Ignition System › Ignition Control Module (IDI) › Removal

Ignition Control Module (IDI): Removal

  1. Disconnect negative battery cable. Disconnect 11-pin harness connector. Remove 4 IDI cover assembly-to-camshaft housing bolts. Remove ignition system assembly from engine.
  2. Remove 4 coil housing-to-cover screws. Remove housing cover. Remove coil harness connector from module. Remove module-to-cover screws. Remove module from cover.
NOTE: DO NOT wipe grease from module or coil if module is not being replaced. If installing a NEW module, spread silicone grease on metal face of module and on cover where module seats. Grease is included with NEW module and is necessary for module cooling purposes.
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