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    1988 BMW 325IC 2.5L FI 6cyl

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    Honda - Accord Prelude 1996 2000

    Ignition Module

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    The Ignition Control Module (ICM) on the Accord and Prelude is located in the distributor housing near the ignition coil. To access the module, remove the distributor cap, rotor, and if equipped, the dust cover.

    TESTING



    Make sure to note the position of the ignition wires on the distributor cap. Use a piece of paper and note the wire locations and connections, or carefully mark the wires before removing them. Failure to reinstall the wires correctly could cause expensive component failure.

    2.2L and 2.3L Engines


    Click image to see an enlarged view

    Fig. Exploded view of the Ignition Control Module (ICM) and related system components

    To test the Ignition Control Module (ICM) on the 2.2L and 2.3L engines, proceed as follows:

    1. Remove the distributor cap, as outlined in Section 1.
    2.  
    3. Remove the black/yellow, blue (1), yellow/green, and the blue (2) wires from the ICM
    4.  
    5. Remove the wires from the ICM
    6.  
    7. With the ignition switch ON , check for battery voltage between the black/yellow and ground. If voltage is present, proceed with testing. If no voltage is present, check for an open circuit between the wire and the ignition switch.
    8.  
    9. With the ignition switch ON , check for battery voltage between the green (white/black on the F22B1 engine) ground. If voltage is present, go to the next step. If no voltage is present, check the ignition coil and the green or white/black wire between the ICM and the coil.
    10.  
    11. Detach the electrical multi-connector from the Powertrain Control Module PCM and check for continuity on the yellow/green wire between the multi-connector and the yellow/green wire at the ICM. There should be continuity. If there is no continuity, check for an open circuit in the yellow/green wire circuit. Check for continuity between the yellow/green wire and ground. There should be no continuity. If there is continuity to ground, locate where the yellow/green wire is shorted to ground, and repair. Reconnect the PCM multi-connector.
    12.  
    13. Detach the connector from the gauge assembly and check for continuity on the blue wire between the ICM and the tachometer. There should be continuity here.
    14.  
    15. If all the test conditions passed, replace the ICM.
    16.  

    2.7L Engine
    1. Loosen the fasteners securing the distributor cap to the distributor housing, then remove the cap with the wires attached and place safely aside.
    2.  
    3. Remove the distributor cap seal from the distributor body.
    4.  
    5. Locate the fastener that secures the ignition rotor to the distributor shaft, note the position of the rotor for reinstallation, then remove the fastener and the rotor. If equipped, the protective cover.
    6.  
    7. Locate the Ignition Control Module (ICM), which is near the ignition coil and mounted onto the distributor housing plate. To test the ICM, proceed as follows:
    8.  
    9. Remove the wires from the ICM
    10.  
    11. With the ignition switch ON , check for battery voltage between the yellow wire and ground. If voltage is present, proceed with testing. If no voltage is present check for an open circuit between the wire and the ignition switch.
    12.  



    Click image to see an enlarged view

    Fig. Testing the Ignition Control Module (ICM)-2.7L engine

    1. With the ignition switch ON , check for battery voltage between the green wire and the body ground. If voltage is present, go to the next step. If no voltage is present, check the ignition coil and the green wire between the ICM and the coil.
    2.  
    3. Detach the electrical multi-connector from the Powertrain Control Module PCM and check for continuity on the yellow/green wire between the multi-connector and the yellow/green wire at the ICM. There should be continuity. If there is no continuity, check for an open circuit in the yellow/green wire circuit. Check for continuity between the yellow/green wire and ground. There should be no continuity. If there is continuity to ground, locate where the yellow/green wire is shorted to ground, and repair. Reconnect the PCM multi-connector.
    4.  
    5. If all the test conditions passed, replace the ICM.
    6.  

    3.0L Engine
    1. Unplug the 3-prong connector from the distributor.
    2.  
    3. With the ignition switch ON , check for voltage between the No. 2 terminal and the body ground. If there is not any battery voltage, check the ignition coil and the BLK/YEL wire between the ICM and the ignition coil.
    4.  



    Click image to see an enlarged view

    Fig. Ignition Control Module (ICM) terminal identification-3.0L engine

    1. Turn the ignition switch ON . Check for voltage between the No. 3 terminal and body ground. If no voltage is detected, check the ignition coil and the BLU wire between the ICM and the ignition coil
    2.  
    3. Detach the weather pack connector from the Powertrain Control Module (PCM). Check continuity at the No. 1 terminal between the ICM connector terminal No. 1 and the PCM connector terminal B13. Continuity should be detected here.
    4.  
    5. Check continuity between the No. 1 terminal and a body ground. No continuity should be detected here. If there is, the ICM is most likely damaged.
    6.  
    7. Attach all detached connectors.
    8.  
    9. If all of the above tests are normal, replace the ICM.
    10.  

    REMOVAL & INSTALLATION





    Click image to see an enlarged view

    Fig. Exploded view of a typical Ignition Control Module (ICM)

    1. Disconnect the negative battery cable.
    2.  
    3. Remove the distributor cap, ignition rotor, and protective leak cover.
    4.  
    5. Detach the wires from the Ignition Control Module (ICM), then remove the ICM.
    6.  
    7. Installation is the reverse of the removal procedure.
    8.  

    The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about five minutes with all accessories OFF and with the transmission in Park or Neutral.

     
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