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Home >> Acura >> 2007 >> MDX >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Immobilizer System >> System Check

System Check

  1. Connect the HDS to the data link connector.
  2. Turn the ignition switch ON (II).
  3. Monitor the System Check in the Immobilizer Info with the HDS.
  4. If the HDS displays the "Immobilizer system is normal", the immobilizer system is OK. If the HDS displays any other messages, check as follows:
    SYSTEM CHECK CHART

    Status Log No. System Check Possible Failures
    A-1 Immobilizer system is not normal
    • This key is not registered in the immobilizer-keyless control unit. Try to register keys by using "KEYS".
    • The communication was not good between the antenna and the immobilizer key by influence of metal such as key chains.
    • The communication was not good between the antenna and the immobilizer key by battery voltage low.
    A-2 Immobilizer system is not normal
    • Intermittent interruption between transponder and immobilizer-keyless control unit.
    • The immobilizer key type is different. It is not for this vehicle but for another one or for other company's one.
    • Key failure (transponder failure)
    • The communication was not good between the antenna and the immobilizer key by influence of metal such as key chains.
    • The communication was not good between the antenna and the immobilizer key by battery voltage low.
    A-3 Immobilizer system is not normal
    • The ignition switch was turned ON (II) with a non-immobilizer key.
    • The immobilizer key type is different. It is not for this vehicle but for another one or for other company's one.
    • Key failure (transponder failure)
    • The communication was not good between the antenna and the immobilizer key by influence of metal such as key chains.
    • The communication was not good between the antenna and the immobilizer key by battery voltage low.
    • Immobilizer-keyless control unit failure
    B-1 Immobilizer system is not normal
    • The PCM was not registered. Try to register the PCM by using "REPLACE PCM".
    • The communication was not good between the PCM and the immobilizer-keyless control unit by battery voltage low.
    • The communication was not good between the immobilizer-keyless control unit and the PCM by influence of some noise.
    B-2 Immobilizer system is not normal
    • The PCM was not registered. Try to register the PCM by using "REPLACE PCM".
    • The communication was not good between the PCM and the immobilizer-keyless control unit by battery voltage low.
    • The communication was not good between the immobilizer-keyless control unit and the PCM by influence of some noise.
    D-1 Immobilizer system is not normal
    • Harness short from the PCM to the immobilizer-keyless control unit. (IMOCD/S-NET line short)
    • The communication was not good between the PCM and the immobilizer-keyless control unit by battery voltage low.
    • The communication was not good between the immobilizer-keyless control unit and the PCM by influence of some noise.
    • Immobilizer-keyless control unit failure
    • PCM failure
    D-2 Immobilizer system is not normal
    • Blown fuse
    • Harness open from the immobilizer control unit-receiver and the imoes unit.
    • The communication was not good between the immobilizer control unit-receiver and the imoes unit by influence of some noise.
    D-3 Immobilizer system is not normal
    • Blown fuse
    • Harness open from the PCM to the immobilizer-keyless control unit.
    • The communication was not good between the PCM and the immobilizer-keyless control unit by battery voltage low.
    • The communication was not good between the immobilizer-keyless control unit and the PCM by influence of some noise.
    • Immobilizer-keyless control unit failure
    • PCM failure
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