LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2002 >> 4Runner Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 344 (Engine Immobilizer System - Diagnostics) >> Problem Symptoms Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table

WARNING: This page is about a different car, the 2002 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
Problem Symptoms

Symptom/Suspect Area Go To
Immobilizer is not set (Engine starts with key codes other than the registered key code.)
ECM (1)
Engine does not start.
Key (2)
Wire harness (1)
Transponder key coil (3)
Amplifier (4)
ECM (1)
Security indicator is always ON.
Security indicator (5)
Wire harness (1)
ECM (1)
Security indicator is always ON (Although code has been registered in the automatic registration mode, indicator is not OFF.)
Wire Harness (1)
Transponder key coil (3)
Amplifier (4)
ECM (1)
Security indicator is OFF. (When DTC of immobilizer is output)
Wire Harness (1)
Transponder key coil (3)
Amplifier (4)
ECM (1)
Security indicator is OFF. (When DTC of immobilizer is not output)
Wire Harness (1)
ECM (1)
Security indicator is abnormally blinking
Wire Harness (1)
ECM (1)
(1) See Introduction .
(2) Check that the key which did not start the engine has been registered and that it is possible to start with other already registered key codes.
(3) For Transponder key coil inspection, see TRANSPONDER KEY COIL .
(4) Testing is not available from manufacturer
(5) Finish the automatic registration mode because the mode might still remain.