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HOMESERVICE MANUALSHONDA2009ODYSSEY EX-LREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSIMMOBILIZER SYSTEMSYSTEM CHECK
2009 Honda Odyssey EX-L

System Check

2009 Honda Odyssey EX-LSECTION System Check
  1. Connect the HDS to the data link connector.
  2. Turn the ignition switch to 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 The key is not registered
    • This key is not registered in the immobilizer control unit-receiver. Try to register keys using the HDS.
    • Poor communication between the antenna and the immobilizer key because of interference caused by items such as key chains.
    • Poor communication between the antenna and the immobilizer key because of low battery voltage
    A-2 Communication error between the key and immobilizer control unit-receiver
    • Intermittent interruption between transponder and immobilizer control unit-receiver.
    • 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.
    • Poor communication between the antenna and the immobilizer key because of low battery voltage.
    A-3 No communication between the key and immobilizer control unit-receiver
    • The ignition switch was turned on 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)
    • Poor communication between the antenna and the immobilizer key because of interference caused by items such as key chains.
    • Poor communication between the antenna and the immobilizer key because of low battery voltage.
    • Immobilizer control unit-receiver failure
    B-1 The PCM is not registered
    • The PCM was not registered. Try to register the PCM using the HDS. .
    • Poor communication between the ECM/PCM and the immobilizer control unit-receiver because of low battery voltage.
    • Poor communication between the immobilizer control unit-receiver and the PCM because of interference.
    B-2 Error of communication format in PCM
    • The PCM was not registered. Try to register the PCM using the HDS.
    • Poor communication between the PCM and the immobilizer control unit-receiver because of low battery voltage.
    • Poor communication between the immobilizer control unit receiver and the PCM because of interference.
    C-1 IMOES unit is not registered The IMOES unit was not registered correctly. Try to register the IMOES unit using the HDS .
    C-2 Error of communication format IMOES unit and immobilizer control unit-receiver
    • IMOES unit was not registered correctly. Try to register the /IMOES unit using the HDS.
    • Poor communication between the PCM and the immobilizer control unit-receiver because of low battery voltage.
    • Poor communication between the immobilizer control unit-receiver and the PCM by influence of some noise.
    D-1 S- NET line short
    • Harness short from the PCM to the immobilizer control unit-receiver. (S-net line short)
    • Poor communication between the PCM and the immobilizer control unit-receiver because of low battery voltage.
    • Poor communication between the immobilizer control unit-receiver and the PCM because of electrical interference.
    • Immobilizer control unit-receiver failure
    • PCM failure
    D-2 No communication between IMOES unit and immobilizer control unit-receiver
    • Blown fuse
    • Harness open from the IMOES unit to the immobilizer control unit-receiver.
    • Poor communication between the IMOES unit and the immobilizer control unit-receiver because of low battery voltage.
    • immobilizer control unit-receiver failure. IMOES unit failure
    • Poor communication between the immobilizer control unit-receiver and the IMOES unit because of electrical interference.
    • PCM failure
    D-3 No communication between PCM and immobilizer control unit-receiver
    • Blown fuse
    • Harness open from the PCM to the immobilizer control unit-receiver.
    • Poor communication between the PCM and the immobilizer control unit-receiver because of low battery voltage.
    • Poor communication between the immobilizer control unit-receiver and the PCM because of interference.
    • Immobilizer control unit-receiver failure
    • PCM failure
    E-1 Initial registration of immobilizer control unit-receiver is not completed The immobilizer control unit-receiver is not registered. Try to register the immobilizer control unit-receiver using the HDS.
    E-2
    E-3
    E-4
    E-5
    F-1 Special Mode Turn the ignition switch to ON (II) and to LOCK (0) with the registered key.
    F-2
    F-3
    F-4
    F-5
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.