Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
STEERING LOCK SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Steering wheel cannot unlock (engine cannot start). | Steering lock actuator assembly (Steering lock ECU) | Refer to TERMINALS OF ECU |
| Main body ECU | Refer to TERMINALS OF ECU | |
| ECU aggregation box assembly (certification ECU) | Refer to TERMINALS OF ECU | |
| Smart key system (for 2GR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (for 2AR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering lock motor drive power circuit | Refer to Steering Lock Motor Drive Power Circuit | |
| Unlock position sensor signal circuit | Refer to Unlock Position Sensor Signal Circuit | |
| Steering wheel cannot unlock (after connecting the Techstream to DLC3 and starting engine, Data List steering lock system item Lock/Unlock Receive data is read and display of steering lock command reception record is NO). | Main body ECU | Refer to TERMINALS OF ECU |
| ECU aggregation box assembly (certification ECU) | Refer to TERMINALS OF ECU | |
| ID code box | Refer to TERMINALS OF ECU | |
| LIN communication line | Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN | |
| Smart key system (for 2GR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (for 2AR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering wheel cannot lock. | Steering lock actuator assembly (Steering lock ECU) | Refer to TERMINALS OF ECU |
| Main body ECU | Refer to TERMINALS OF ECU | |
| ECU aggregation box assembly (certification ECU) | Refer to TERMINALS OF ECU | |
| Smart key system (for 2GR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (for 2AR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering lock motor drive power circuit | Refer to Steering Lock Motor Drive Power Circuit | |
| Power source circuit | Refer to Power Source Circuit | |
| Steering wheel cannot lock (after connecting the Techstream to DLC3 and starting engine, Data List steering lock system item Lock/Unlock Receive data is read and display of steering lock command reception record is NO). | Main body ECU | Refer to TERMINALS OF ECU |
| ECU aggregation box assembly (certification ECU) | Refer to TERMINALS OF ECU | |
| ID code box | Refer to TERMINALS OF ECU | |
| LIN communication line | Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN | |
| Smart key system (for 2GR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (for 2AR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |