FixVault
Home › Lexus › 2005 › LX 470 › Repair and Diagnosis › Body & Frame › Door Locks › Engine Immobilizer System - Diagnostics › Problem Symptoms Table

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE - ENGINE IMMOBILIZER SYSTEM

Symptom Suspect Area
Immobiliser is not set. (Engine starts with key codes other than the registered key code.)
  1. Transponder key ECU
Engine does not start.
  1. Key ((1))
  2. Wire harness
  3. Transponder key amplifier with coil
  4. Transponder key ECU
  5. ECM
Security indicator is always ON.
  1. Multi display (security indicator) ((2))
  2. Wire harness
  3. Transponder key ECU
Security indicator is always ON. (Although code has been registered in the automatic registration mode, indicator is not OFF.)
  1. Wire harness
  2. Transponder key amplifier with coil
  3. Transponder key ECU
Security indicator is OFF. (When DTC of immobiliser is output)
  1. Cecurity Indicator light circuit
  2. Transponder key amplifier with coil
  3. Transponder key ECU
Security indicator is OFF. (When DTC of immobiliser is not output)
  1. Cecurity Indicator light circuit
  2. Multi display (security indicator)
  3. Diagnosis circuit
  4. Transponder key ECU
Security indicator is abnormally blinking.
  1. Cecurity Indicator light circuit
  2. Transponder key ECU
No code is output.
  1. Power source circuit
  2. Transponder key ECU
(1) Check that the key which did not start the engine has been registered and that it is possible to start the engine with other already registered key.

(2) Finish the automatic registration mode because the mode might being remain.
About FixVault