STEERING LOCK SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Steering wheel cannot unlock (engine cannot start). | Steering lock actuator assembly (Steering lock ECU) | |
| Main body ECU | ||
| Certification ECU (Smart key ECU assembly) | ||
| Entry and start system (for start function) | ||
| Steering lock motor drive power circuit | ||
| Unlock position sensor signal circuit | ||
| Steering wheel cannot unlock (after connecting the intelligent tester to DLC3, starting engine, Data List steering lock system item Lock/Unlock Receive data is read, and steering lock command reception record display is NO). | Main body ECU | |
| Certification ECU (Smart key ECU assembly) | ||
| ID code box (Immobiliser code ECU) | ||
| LIN communication line | ||
| Entry and start system (for start function) | ||
| Steering wheel cannot lock. | Steering lock actuator assembly (Steering lock ECU) | |
| Main body ECU | ||
| Certification ECU (Smart key ECU assembly) | ||
| Entry and start system (for start function) | ||
| Steering lock motor drive power circuit | ||
| Power source circuit | ||
| Steering wheel cannot lock (after connecting the intelligent tester to DLC3, starting engine, Data List steering lock system item Lock/Unlock Receive data is read, and steering lock command reception record display is NO). | Main body ECU | |
| Certification ECU (Smart key ECU assembly) | ||
| ID code box (Immobiliser code ECU) | ||
| LIN communication line | ||
| Entry and start system (for start function) |