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Problem Symptoms Table

HINT:

If any malfunction still exists even after checking and confirming that all the circuits are normal, replace the ECU.

PROBLEM SYMPTOMS TABLE

Problem Symptom Suspected Area Go To
Immobiliser is not set
(Engine starts with key codes other than the registered key code)
  1. Door courtesy switch circuit
  2. Transponder key ECU assy
  1. DOOR COURTESY SWITCH CIRCUIT 
  2. -
Engine does not start
  1. Key
  2. Key unlock warning switch
  3. Transponder key amplifier circuit
  4. Transponder Key ECU assy
  5. ECM
  1. (1)
  2. DTC B2780: PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION 
  3. DTC B2796, B2798: NO COMMUNICATION IN IMMOBILIZER SYSTEM & COMMUNICATION MALFUNCTION NO. 2 
  4. -
  5. ECM (2GR-FE)
Security indicator is always ON
  1. Security indicator light
  2. Transponder key ECU assy
  1. (2)
  2. -
Security indicator is always ON
(Although code has been registered in the automatic registration mode, indicator does not go off)
  1. Tranponder key amplifier circuit
  2. Transponder key ECU assy
  1. DTC B2796, B2798: NO COMMUNICATION IN IMMOBILIZER SYSTEM & COMMUNICATION MALFUNCTION NO. 2 
  2. -
Security indicator is always OFF
  1. Security indicator light circuit
  2. Transponder key ECU assy
  1. SECURITY INDICATOR LIGHT CIRCUIT 
  2. -
Security indicator is abnormally blinking Transponder key ECU assy -
No code is output
  1. ECU power source circuit
  2. Diagnosis circuit
  3. Transponder key ECU assy
  1. ECU POWER SOURCE CIRCUIT 
  2. DIAGNOSIS CIRCUIT 
  3. -
(1) Check that the key which did not start the engine has been registered, and that it is possible to start with other registered key.
(2) Finish the automatic registration mode because the mode might still remain.
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