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Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent >> Theft Deterrent System >> Problem Symptoms Table

Problem Symptoms Table

HINT:

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 area in the order they are listed. Replace parts as necessary.

PROBLEM SYMPTOMS TABLE

Symptom Suspected area
Theft deterrent system cannot be set SECURITY INDICATOR LIGHT CIRCUIT 
Unlock warning switch circuit 
Door courtesy switch circuit
Door unlock detection switch circuit
Engine hood courtesy switch circuit 
Power source circuit 
Theft warning ECU assembly
Security indicator is not blinking when theft deterrent system is set SECURITY INDICATOR LIGHT CIRCUIT 
Theft warning ECU assembly
Theft deterrent system cannot be unset even if ignition switch is ON Unlock warning switch assembly
Power source circuit 
Theft warning ECU assembly
During warning condition, horn does not operate SECURITY HORN CIRCUIT 
Theft warning ECU assembly