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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door Lock >> Key Reminder Warning System >> Problem Symptoms Table

Problem Symptoms Table

Key reminder warning system 

KEY REMINDER WARNING SYSTEM

Symptom Suspected area See
Key reminder buzzer does not sound 1. Front door courtesy light switch (driver side) KEY REMINDER BUZZER DOES NOT SOUND 
2. Unlock warning switch
3. Combination meter
4. Multiplex network door ECU front LH (driver door ECU)
5. Theft warning ECU power source circuit THEFT WARNING ECU POWER SOURCE CIRCUIT
6. Transponder key ECU power source circuit POWER SOURCE CIRCUIT