Problem Symptoms Table
If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting.
ENGINE IMMOBILIZER SYSTEM
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area | See |
|---|---|---|
| Hybrid control system does not start. | 1. ECU power source circuit | ECU POWER SOURCE CIRCUIT |
| 2. Unlock warning switch assembly | DTC B2780 Push Switch / Key Unlock Warning Switch Malfunction | |
| 3. Key | - | |
| 4. Transponder key amplifier | DTC B2796 No Communication in Immobilizer System; DTC B2798 Communication Malfunction No. 2 | |
| 5. Transponder key ECU assembly | - | |
| 6. Hybrid vehicle control ECU | REMOVAL | |
| Security indicator is always ON. | 1. Transponder key ECU assembly | - |
| 2. Security indicator light assembly | - | |
| Security indicator is always ON (Although a code has been registered in the automatic registration mode, indicator does not go off). | 1. Transponder key amplifier | DTC B2796 No Communication in Immobilizer System; DTC B2798 Communication Malfunction No. 2 |
| 2. Transponder key ECU assembly | - | |
| Security indicator is always OFF. | 1. Security indicator light assembly | SECURITY INDICATOR LIGHT CIRCUIT |
| 2. Transponder key ECU assembly | - | |
| Security indicator is abnormally blinking. | 1. Transponder key ECU assembly | - |
| Immobilizer is not set (Hybrid control system starts with a key code other than the registered key code). | 1. Door courtesy switch circuit | DOOR COURTESY SWITCH CIRCUIT |
| 2. Transponder key ECU assembly | - | |
| No code is output. | 1. ECU Power source circuit | ECU POWER SOURCE CIRCUIT |
| 2. Diagnosis circuit | DIAGNOSIS CIRCUIT | |
| 3. Transponder key ECU assembly | - |
HINT:
- If the hybrid vehicle control system does not start, check that the key which did not start the hybrid control system has been registered, and that it is possible to start with another registered key.
- If the security indicator is always ON, finish the automatic registration mode in case the mode still operates.