ENGINE IMMOBILISER SYSTEM SYSTEM DESCRIPTION


  1. ENGINE IMMOBILISER SYSTEM DESCRIPTION


    1. The engine immobiliser system determines whether or not to enable starting of the hybrid control system based on a comparison of the key ID code and the vehicle pre-registered code. The engine immobiliser system compares the vehicle certification ECU (smart key ECU assembly) pre-registered ID code with the key-embedded transponder chip ID code. If the ID codes do not match, the engine immobiliser system activates and the hybrid control system cannot be started. The certification ECU (smart key ECU assembly) manages communication with the hybrid control system, power management control ECU, transmission control ECU assembly and ID code box (immobiliser code ECU). When the ID codes of the transponder chip and certification ECU (smart key ECU assembly) match, the certification ECU (smart key ECU assembly) authorizes the starting of the hybrid control system.

  2. START FUNCTION PROBLEM SYMPTOMS

    Symptom Suspected Area Component Malfunction Possible Output DTC Related Data List Item
    Hybrid control system cannot be started*1 Certification ECU (smart key ECU assembly) Open or short circuit inside ECU

    • B278A

    • B2790

    • Ignition Switch

    • #Codes

    • Immobilizer when IG=ON

    • Immobiliser

    • Master Key

    • Sub Key

    • BCC Malfunction

    • Abnormal Status

    • Different Encrypt Code

    • Different Serial Number

    • Frame Error

    • Response

    • Wireless Starter Com ID

    • Wireless C Code

    • Engine Start Condition

    • ID-BOX Sleep Condition

    • ID-BOX Start Condition

    • Engine Start Request

    • 3bit Code Request

    • S Code Check

    • L Code Check

    • Unlock Request Receive

    • Lock Request Receive

    • S Code Check (Past)

    • L Code Check (Past)

    • EFI Code Receive

    • EFI communication

    • R Code Check
    Hybrid control system cannot be started*1 ID code box (immobiliser code ECU) Open or short circuit inside ECU

    • B2790

    • B2799

    • B279A

    • Immobilizer when IG=ON

    • Immobiliser

    • Master Key

    • Sub Key

    • BCC Malfunction

    • Abnormal Status

    • Different Encrypt Code

    • Different Serial Number

    • Frame Error

    • Response

    • ID-BOX Sleep Condition

    • ID-BOX Start Condition

    • Engine Start Request

    • 3bit Code Request

    • S Code Check

    • L Code Check

    • S Code Check (Past)

    • L Code Check (Past)

    • EFI Code Receive

    • EFI communication

    • R Code Check
    Power management control ECU Open or short circuit inside ECU

    • B2799

    • B279A

    • B279C

    		 EFI Code Receive
    Hybrid control system Power management control ECU incompatible with engine immobiliser system installed B279C

    • Engine Start Condition

    • EFI Code Receive
    Power source mode cannot be changed*1 Power switch Open or short circuit inside switch B278A

    • Ignition Switch

    • Unlock Request Receive

    • Lock Request Receive
    Power management control ECU Open or short circuit inside ECU

    • B2271

    • B2274

    • Ignition Switch

    • Immobilizer when IG=ON

    • Immobiliser

    • *1: Refer to Problem Symptoms Table for Entry and Start System (for Start Function)*2 or Push-button Start System*3.

    • *2: w/ Entry Function

    • *3: w/o Entry Function