Problem Symptoms Table
WARNING: This page is about a different car, the 2012 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
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.
ENGINE IMMOBILIZER SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Unable to register the key. | Door courtesy switch circuit | Refer to Door Courtesy Switch Circuit |
| Wire harness or connector | Refer to ECU Power Source Circuit | |
| Transponder key ECU assembly | - | |
| Engine does not start. | Key | Refer to DATA LIST / ACTIVE TEST |
| ECU power source circuit | Refer to ECU Power Source Circuit | |
| SFI system (for 2AZ-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| SFI system (for 2ZR-FE) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Transponder key ECU assembly | - | |
| Security indicator is always ON. | Transponder key ECU assembly | Refer to Security Indicator Light Circuit |
| Wire harness or connector | - | |
| Telltale light assembly | - | |
| Security indicator is OFF. | Transponder key ECU assembly | Refer to Security Indicator Light Circuit |
| Wire harness or connector | - | |
| Telltale light assembly | - | |
| Security indicator is blinking abnormally. | Transponder key ECU assembly | - |
| Engine immobilizer system DTCs are not output. | Wire harness or connector | Refer to Diagnosis Circuit |
| Transponder key ECU assembly | - |