Note
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
Tech Tips
Troubleshooting of the theft deterrent system is based on the premise that the power door lock control system and the wireless door lock control system are operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the power door lock control system and the wireless door lock control system are operating normally.
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Theft deterrent system cannot be set | Refer to "security indicator light does not blink" | |
| Refer to "door courtesy switch circuit" | ||
| Refer to "luggage compartment door courtesy switch circuit" | ||
| Front door lock with motor assembly | ||
| Luggage compartment door lock assembly | ||
| Refer to "engine hood courtesy switch circuit" | ||
| 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 engine switch is turned on (IG) | Refer to "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 (multiplex network body ECU) | ||
| Theft deterrent system can be set even when door is open | Refer to "door courtesy switch circuit" | |
| Refer to "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 (multiplex network body ECU) | ||
| Theft deterrent system can be set even when engine hood is open | Refer to "engine hood courtesy switch circuit" | |
| Vehicle horns do not sound while theft deterrent system is in alarm sounding state | Refer to "horn circuit" | |
| Hazard warning lights do not flash while theft deterrent system is in alarm sounding state | Combination meter assembly | - |
| If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) | ||
| Security horn does not sound while theft deterrent system is in alarm sounding state*1 | Refer to "security horn circuit" | |
| Theft warning siren does not sound while theft deterrent system is in warning operation*2 | Refer to "theft warning siren circuit" | |
| Hazard warning lights flash even when theft deterrent system is not set | Combination meter assembly | - |
| If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) | ||
| The vehicle does not enter the alarm sounding state according to intrusion sensor operation*3 | Refer to "intrusion sensor circuit" | |
| Refer to "intrusion sensor cancel switch circuit" | ||
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) | ||
| Intrusion sensor cancel switch does not operate*3 | Refer to "intrusion sensor cancel switch circuit" | |
| If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) | ||
| The vehicle does not enter the alarm sounding state according to tilt sensor operation*4 | Refer to "tilt sensor circuit" | |
| Refer to "intrusion sensor cancel switch circuit" | ||
| If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) | ||
| Glass breakage sensor does not operate*3 | Refer to "glass breakage sensor circuit" |
*1: w/ Security Horn Assembly
*2: w/o Security Horn Assembly
*3: w/ Intrusion Sensor Cancel Switch
*4: w/ Tilt Sensor