ENGINE IMMOBILISER SYSTEM > SYSTEM DESCRIPTION

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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.


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
  1. B278A
  2. B2790
  1. Ignition Switch
  2. #Codes
  3. Immobilizer when IG=ON
  4. Immobiliser
  5. Master Key
  6. Sub Key
  7. BCC Malfunction
  8. Abnormal Status
  9. Different Encrypt Code
  10. Different Serial Number
  11. Frame Error
  12. Response
  13. Wireless Starter Com ID
  14. Wireless C Code
  15. Engine Start Condition
  16. ID-BOX Sleep Condition
  17. ID-BOX Start Condition
  18. Engine Start Request
  19. 3bit Code Request
  20. S Code Check
  21. L Code Check
  22. Unlock Request Receive
  23. Lock Request Receive
  24. S Code Check (Past)
  25. L Code Check (Past)
  26. EFI Code Receive
  27. EFI communication
  28. R Code Check
Hybrid control system cannot be started*1
ID code box (immobiliser code ECU)
Open or short circuit inside ECU
  1. B2790
  2. B2799
  3. B279A
  1. Immobilizer when IG=ON
  2. Immobiliser
  3. Master Key
  4. Sub Key
  5. BCC Malfunction
  6. Abnormal Status
  7. Different Encrypt Code
  8. Different Serial Number
  9. Frame Error
  10. Response
  11. ID-BOX Sleep Condition
  12. ID-BOX Start Condition
  13. Engine Start Request
  14. 3bit Code Request
  15. S Code Check
  16. L Code Check
  17. S Code Check (Past)
  18. L Code Check (Past)
  19. EFI Code Receive
  20. EFI communication
  21. R Code Check
Power management control ECU
Open or short circuit inside ECU
  1. B2799
  2. B279A
  3. B279C
EFI Code Receive
Hybrid control system
Power management control ECU incompatible with engine immobiliser system installed
B279C
  1. Engine Start Condition
  2. EFI Code Receive
Power source mode cannot be changed*1
Power switch
Open or short circuit inside switch
B278A
  1. Ignition Switch
  2. Unlock Request Receive
  3. Lock Request Receive
Power management control ECU
Open or short circuit inside ECU
  1. B2271
  2. B2274
  1. Ignition Switch
  2. Immobilizer when IG=ON
  3. Immobiliser
  1. *1: Refer to Problem Symptoms Table for Entry and Start System (for Start Function)*2 or Push-button Start System*3.
  2. *2: w/ Entry Function
  3. *3: w/o Entry Function