Tech Tips
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 fuse and relay before investigating the suspected areas shown in the table below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Theft deterrent system cannot be set | Refer to "Security Indicator Light Does not Blink" | |
| ECU power source circuit | ||
| Door courtesy switch circuit | ||
| Luggage compartment door courtesy switch circuit | ||
| Front door lock assembly LH/RH | ||
| Luggage door closer assembly | ||
| Certification ECU (smart key ECU assembly) | - | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Security indicator light does not blink when theft deterrent system is set | Refer to "Security Indicator Light Does not Blink" | |
| Alarm sounding state cannot be canceled when ignition switch is turned on | Entry and start system (for start function) | |
| Certification ECU (smart key ECU assembly) | - | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Theft deterrent system can be set even when a door is open | Door courtesy switch circuit | |
| Luggage compartment door courtesy switch circuit | ||
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Vehicle horn do not sound while theft deterrent system is in warning operation | Horn circuit | |
| Hazard warning lights do not flash while theft deterrent system is in warning operation | Wire harness or connector | - |
| Combination meter assembly | - | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Hazard warning lights flash even when theft deterrent system is not set | Wire harness or connector | - |
| Combination meter assembly | - | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Interior light does not light up while theft deterrent system is in warning operation | Interior light circuit | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - | |
| Interior light comes on even when theft deterrent system is not set | Interior light circuit | |
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (network gateway ECU) | - |