Tech Tips
Use the table below to help determine the cause of the problem symptom. 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.
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, power trunk lid system, horn system, engine immobiliser system and entry and start system are operating normally. Check these systems first before troubleshooting the theft deterrent system.
If the suspected areas operate normally, replace the certification ECU.
| Symptom | Suspected Area | See page |
|---|---|---|
| Theft deterrent system cannot be set | Engine hood courtesy switch circuit | |
| Door Courtesy light switch circuit | ||
| Luggage compartment door courtesy switch | ||
| Certification ECU power source circuit | ||
| Security indicator is not blinking when theft deterrent system is set | Security indicator light circuit | |
| Alarm sounding state cannot be canceled when engine switch is turned on (IG) | IG power source circuit | |
| Theft deterent system can be set even when any door is open | Engine hood courtesy switch circuit | |
| Door courtesy light switch circuit | ||
| Luggage compartment door courtesy switch | ||
| Horns (low pitched, high pitched) do not sound while theft deterrent system is in alarm sounding state | Horn circuit | |
| Hazard warning lights do not flash while theft deterrent system is in warning operation | Hazard warning switch circuit | |
| The security horn does not operate when the vehicle is in the alarm sounding state | Security horn circuit | |
| The theft warning siren assembly does not operate due to the battery being disconnected when the vehicle is in the alarm sounding state (w/ Theft Warning Siren) | Theft warning siren circuit | |
| Intrusion sensor cancel switch does not operate | Intrusion sensor cancel switch circuit | |
| The vehicle does not enter the alarm sounding state according to intrusion sensor operation (w/ Intrusion Sensor) | Intrusion sensor cancel switch circuit | |
| Intrusion sensor circuit | ||
| The vehicle does not enter the alarm sounding state according to tilt sensor operation (w/ Tilt Sensor) | Intrusion sensor cancel switch circuit | |
| Tilt sensor circuit |