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HOMESERVICE MANUALSTOYOTA2004SIENNA XLE LIMITED, AWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSTHEFT DETERRENT SYSTEM - DIAGNOSISPROBLEM SYMPTOMS TABLE
2004 Toyota Sienna XLE Limited, AWD

Problem Symptoms Table

2004 Toyota Sienna XLE Limited, AWDSECTION Problem Symptoms Table

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

NOTE: 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.
PROBLEM SYMPTOMS TABLE - THEFT DETERRENT SYSTEM

Symptom Suspected Area
Theft deterrent system cannot be set
  1. Security indicator circuit
  2. ECU power source circuit
  3. Un-lock warning switch circuit
  4. Door key lock and unlock switch
  5. Door courtesy switch circuit
  6. Backdoor courtesy switch circuit
  7. Engine hood courtesy switch circuit
Security indicator does not blink when theft deterrent system is set
  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. Un-lock warning switch circuit
Theft deterrent system can be set even when a door is open
  1. Door courtesy switch circuit
Horns (low pitched, high pitched) do not sound while theft deterrent system is in warning operation
  1. Horn (low pitched, high pitched) circuit
Headlamps do not flash while theft deterrent system is in warning operation
  1. Headlamp circuit
Taillamps do not flash while theft deterrent system is in warning operation
  1. Taillamp circuit
Hazard warning lamps do not flash while theft deterrent system is in warning operation
  1. Hazard warning circuit
Room lamp does not blink while theft deterrent system is in warning operation
  1. Room lamp circuit
Theft deterrent horn does not sound while theft deterrent system is in warning operation
  1. Theft deterrent horn circuit
Headlamps flash even when theft deterrent system is not set
  1. Headlamp circuit
Taillamps flash even when theft deterrent system is not set
  1. Taillamp circuit
Hazard warning lamps flash even when theft deterrent system is not set
  1. Hazard warning switch circuit
Room lamp flashes even when theft deterrent system is not set
  1. Room lamp circuit
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.