THEFT DETERRENT SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Troubleshooting of the theft deterrent system is based on the premise that the door lock control system, the wireless door lock control system, the lighting system, the horn system, the engine immobiliser system and the 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 | Engine hood courtesy switch circuit | |
| Door courtesy light does not illuminate | - | |
| 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 deterrent system can be set even when any door is open | Engine hood courtesy switch circuit | |
| Door courtesy light does not illuminate | - | |
| 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 warning operation | Turn signal light does not illuminate | - |
| Security horn does not sound while theft deterrent system is set*1 | Security horn circuit | |
| Map light does not illuminate while theft deterrent system is in alarm sounding state | Room light control does not operate | - |
| Theft warning siren does not sound when theft deterrent system is in alarm sounding state*2 | Theft warning siren circuit | |
| Headlights do not flash while theft deterrent system is in alarm sounding state*1 | Headlight signal circuit | |
| Taillights do not flash while theft deterrent system is in alarm sounding state*1 | Taillight circuit | |
| Intrusion sensor cancel switch does not operete*2 | Intrusion sensor cancel switch circuit |
*1: w/ Security Horn
*2: w/ Theft Warning Siren
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If the suspected areas operate normally, replace the certification ECU (smart key ECU assembly).