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Home >> Lexus >> 2005 >> RX 330 FWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Theft Deterrent System - Diagnostics >> Problem Symptoms Table

Problem Symptoms Table

Proceed to the reference shown in the table below for each malfunction symptom and troubleshoot each circuit.

HINT:

Troubleshooting of the theft deterrent system is based on the premise that the door lock control system and the wireless door lock control system are operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the door lock control system and the wireless door lock control system are operating normally.

SYMPTOM SUSPECTED AREA

Symptom Suspected Area Refer To
Theft deterrent system cannot be set
  1. Security indicator circuit
  2. ECU power source circuit
  3. Unlock warning switch circuit
  4. Door key lock and unlock switch
  5. Door courtesy switch circuit
  6. Back door courtesy switch circuit
  7. Engine hood courtesy switch circuit
  1. SECURITY INDICATOR CIRCUIT 
  2. ECU POWER SOURCE CIRCUIT 
  3. KEY REMINDER BUZZER DOES NOT SOUND
  4. INSPECTION
  5. TERMINALS OF ECU 
  6. TERMINALS OF ECU 
  7. ENGINE HOOD COURTESY SWITCH CIRCUIT 
Security indicator does not blink when theft deterrent system is set
  1. Security indicator circuit
  1. SECURITY INDICATOR CIRCUIT 
Alarm sounding state can not be canceled when ignition switch is turned ON-OFF 10 times within 15 seconds
  1. Ignition switch circuit
  2. Unlock warning switch circuit
  1. IGNITION SWITCH CIRCUIT 
  2. KEY REMINDER BUZZER DOES NOT SOUND
Theft deterrent system can be set even when a door is open
  1. Door courtesy switch circuit
  1. TERMINALS OF ECU 
Vehicle horns (low pitched, high pitched) do not sound while theft deterrent system is in warning operation
  1. Vehicle horn (low pitched, high pitched) circuit
  1. -
Headlamps do not flash while theft deterrent system is in warning operation
  1. Headlamp circuit
  1. HEADLIGHT RELAY CIRCUIT
Taillamps do not flash while theft deterrent system is in warning operation
  1. Taillamp circuit
  1. TAIL RELAY CIRCUIT
Hazard warning lamps do not flash while theft deterrent system is in warning operation
  1. Hazard warning circuit
  1. INSPECTION
Room lamp does not light up while theft deterrent system is in warning operation
  1. Room lamp circuit
  1. ILLUMINATION CIRCUIT
Security horn does not sound while theft deterrent system is in warning operation
  1. Security horn circuit
  1. SECURITY HORN CIRCUIT 
Headlamps flash even when theft deterrent system is not set
  1. Headlamp circuit
  1. HEADLIGHT RELAY CIRCUIT
Taillamps flash even when theft deterrent system is not set
  1. Taillamp circuit
  1. TAIL RELAY CIRCUIT
Hazard warning lamps flash even when theft deterrent system is not set
  1. Hazard warning switch circuit
  1. INSPECTION
Room lamp lights even when theft deterrent system is not set
  1. Room lamp circuit
  1. ILLUMINATION CIRCUIT
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