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.
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system, wireless door lock control system, lighting system, horn system and engine immobiliser 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 | IMB fuse | - |
| ECU power source | ||
| Key reminder warning system | ||
| Engine hood courtesy switch circuit | ||
| Security indicator light circuit | ||
| Door courtesy switch circuit | ||
| Harness or connector | - | |
| Main body ECU (cowl side junction block assembly LH) | - | |
| Security indicator is not blinking when theft deterrent system is set | Security indicator light circuit | |
| Alarm sounding state cannot be canceled when ignition switch is turned to ON | IGN fuse | - |
| IG power source | ||
| Harness or connector | - | |
| Main body ECU (cowl side junction block assembly LH) | - | |
| Theft deterrent system can be set even when any door is open | Engine hood courtesy switch circuit | |
| Door courtesy switch circuit | ||
| Horns (low pitched, high pitched) do not sound while theft deterrent system is in alarm sounding state | Horn system | |
| Hazard warning lights do not flash while theft deterrent system is in alarm sounding state | Hazard warning switch circuit | |
| Security horn does not sound while theft deterrent system is in alarm sounding state | Security horn circuit |
If no problems are found in the suspected areas, replace the main body ECU.