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Home >> Acura >> 1997 >> 2.5TL >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Basic Testing) >> Ignition Checks >> Engine Controls - Basic Testing >> Ignition Control Module Input Test
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Ignition Control Module Input Test

WARNING: This page is about a different car, the 1996 Acura 2.5TL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect 4-pin connector from ignition control module (ICM), mounted on ignition coil. Check for continuity between terminal No. 4 and ground. See Fig 1. If continuity exists, go to next step. If continuity does not exist, repair open Black wire.
    Fig 1: Testing Ignition Control Module Input Circuit
    G95F31174Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Turn ignition on. Check voltage between terminals No. 3 and 4 at ICM harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, check for open Black/Yellow wire between coil and ICM. If Black/Yellow wire is not open, substitute known-good ignition coil.
  3. With ignition on, check for battery voltage between terminal No. 2 and 4 at ICM harness connector. If battery voltage does not exist, check for open Green wire between coil and ICM. Repair as necessary. If Green wire is okay, substitute a known-good ignition coil and recheck.
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