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 fuses and relays related to this system before inspecting the suspected areas below.
The troubleshooting procedures for the theft deterrent system are based on the premise that the door lock control system, wireless door lock control system, lighting system, horn system, engine immobiliser system and entry and start system (w/ Entry and Start System) are operating normally. Check these systems first before troubleshooting the theft deterrent system.
| Symptom | Suspected Area | See page |
|---|---|---|
| Theft deterrent system cannot be set | Key reminder warning system | |
| ACC signal circuit | ||
| IG signal circuit | ||
| Front door lock assembly LH | ||
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Back door lock assembly | ||
| Door courtesy switch circuit | ||
| Back door courtesy switch circuit | ||
| Engine hood courtesy switch circuit | ||
| Replace main body ECU (multiplex network body ECU) | ||
| Security indicator is not blinking when theft deterrent system is set | Security indicator light circuit | |
| Replace main body ECU (multiplex network body ECU) | ||
| Theft deterrent system can be set even when any door is open | Door courtesy switch circuit | |
| Back door courtesy switch circuit | ||
| Engine hood courtesy switch circuit | ||
| Replace main body ECU (multiplex network body ECU) | ||
| Horns (low pitched, high pitched) do not sound while theft deterrent system is in alarm sounding state | Horn circuit | |
| Replace main body ECU (multiplex network body ECU) | ||
| Security horn does not sound while theft deterrent system is in alarm sounding state | Security horn circuit | |
| Replace main body ECU (multiplex network body ECU) | ||
| Hazard warning lights do not flash while theft deterrent system is in alarm sounding state | Lighting system (EXT) | |
| Replace main body ECU (multiplex network body ECU) |