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
STEERING LOCK SYSTEM PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | Reference |
|---|---|---|
| Steering wheel cannot unlock (engine cannot start). | Steering lock actuator assembly (Steering lock ECU) | TERMINALS OF ECU |
| Main body ECU | TERMINALS OF ECU | |
| Certification ECU (Smart key ECU assembly) | TERMINALS OF ECU | |
| Smart key system (start function) | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering lock motor drive power circuit | STEERING LOCK MOTOR DRIVE POWER CIRCUIT | |
| Unlock position sensor signal circuit | UNLOCK POSITION SENSOR SIGNAL CIRCUIT | |
| Steering wheel cannot unlock (after connecting the Techstream to DLC3, starting engine, Data List steering lock system item Lock/Unlock Receive data is read, and steering lock command reception records display is NO). | Main body ECU | TERMINALS OF ECU |
| Certification ECU (Smart key ECU assembly) | TERMINALS OF ECU | |
| ID code box (Immobilizer code ECU) | TERMINALS OF ECU | |
| LIN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (start function) | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering wheel cannot lock. | Steering lock actuator assembly (Steering lock ECU) | TERMINALS OF ECU |
| Main body ECU | TERMINALS OF ECU | |
| Certification ECU (Smart key ECU assembly) | TERMINALS OF ECU | |
| Smart key system (start function) | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Steering lock motor drive power circuit | STEERING LOCK MOTOR DRIVE POWER CIRCUIT | |
| Power source circuit | POWER SOURCE CIRCUIT | |
| Steering wheel cannot lock (after connecting the Techstream to DLC3, starting engine, Data List steering lock system item Lock/Unlock Receive data is read, and steering lock command reception records display is NO). | Main body ECU | TERMINALS OF ECU |
| Certification ECU (Smart key ECU assembly) | TERMINALS OF ECU | |
| ID code box (Immobilizer code ECU) | TERMINALS OF ECU | |
| LIN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Smart key system (start function) | HOW TO PROCEED WITH TROUBLESHOOTING |