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Home >> Lexus >> 2001 >> IS 300 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft Systems >> Trouble Shooting

Trouble Shooting

NOTE: For anti-theft system trouble shooting, see SYMPTOM DIAGNOSIS  table.
SYMPTOM DIAGNOSIS

Problem (1) Inspect
System Cannot Be Set Anti-Theft Indicator Circuit
ECU Power Source Circuit
Key Unlock Warning Switch Circuit
Luggage Compartment Door Key Lock & Unlock Switch Circuit
Luggage Compartment Door Courtesy Switch Circuit
Door Key Lock & Unlock Switch Circuit
Door Courtesy Switch Circuit
Door Unlock Detection Switch Circuit
Engine Hood Courtesy Switch Circuit
Indicator Does Not Flash When System Is Set Anti-Theft Indicator Circuit
With System Set, System Does Not Operate
When Rear Door Is Unlocked Door Unlock Detection Switch Circuit
When Luggage Compartment Door Is Opened By Other Than Key Luggage Compartment Door Courtesy Switch Circuit
When Engine Hood Is Opened Engine Hood Courtesy Switch Circuit
While System Is In Warning Operation
Standard Horns Do Not Sound Horn Relay Circuit
Anti-Theft Horn Does Not Sound Anti-Theft Horn Circuit
Headlights Do Not Flash Headlight Control Relay Circuit
Taillights Do Not Flash Taillight Relay Circuit
Hazard Lights Do Not Flash Hazard Switch Circuit
Door Lock Is Not Locked Door Unlock Detection Switch Circuit
Standard Horns Sound When System Is Not Set Horn Relay Circuit
Anti-Theft Horn Sounds When System Is Not Set Anti-Theft Horn Circuit
Headlights Flash When System Is Not Set Headlight Relay Circuit
Taillights Flash When System Is Not Set Taillight Relay Circuit
(1) Perform appropriate circuit test under CIRCUIT TESTS . If more than one test is listed, perform tests in order listed.