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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 842 (ENGINE IMMOBILIZER SYSTEM - DIAGNOSIS)PROBLEM SYMPTOMS TABLE
2004 Toyota Matrix XR, FWD, Standard

Problem Symptoms Table

2004 Toyota Matrix XR, FWD, StandardSECTION Problem Symptoms Table
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS

Symptom Suspect Area See Section
Engine immobiliser system is not set. (Engine starts with key codes except the registered key code)
  1. Power source circuit
  2. Transponder key ECU
  1. DTC 02799 Engine Immobilizer System 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Engine does not start.
  1. Key
  2. Wire harness
  3. Transponder key amplifier circuit (w/ Coil)
  4. Transponder key ECU
  1. (1)
  2. -
  3. DTC B2796 No Communication in Immobiliser system 
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Security indicator is always ON.
  1. Security indicator
  2. Wire harness
  3. Theft deterrent ECU (3)
  4. Transponder key ECU
  1. (2)
  2. -
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Security indicator is always OFF. (Although code has been registered in the automatic registration mode, indicator is not OFF)
  1. Wire harness
  2. Theft deterrent ECU (3)
  3. Transponder key ECU
  1. -
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
(1) Check whether or not the key which did not start the engine has been registered and that it is possible to start with other already registered keys.
(2) Finish the automatic registration mode because the mode might still remain.
(3) The security indicator gives blinking signals of the immobiliser when the Transponder Key ECU sends a command through BEAN to the Theft Deterrent ECU to activate the security indicator.
RENDER: 1.0x

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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.