Problem Symptoms Table: Others:

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.

OTHERS PROBLEM SYMPTOM

Symptom	Suspect Area	See Section
Navigation system is abnormal	Navigation ECU communication circuit Navigation ECU Multi display ECU Passenger side J/B ECU	NAVIGATION ECU COMMUNICATION CIRCUIT HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Shift point too high or too low.	Pattern select switch circuit Shift lock ECU	PATTERN SELECT SWITCH CIRCUIT HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Rear sunshade is abnormal.	Rear sunshade ECU circuit Passenger side J/B ECU	REAR SUNSHADE RELAY COMMUNICATION CIRCUIT HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Brake pad indicator does not light up.	Combination meter system Brake pad sensor circuit ABS Skid control ECU Problem symptom table on theft deterrent system	ENGINE IMMOBILIZER SYSTEM - DIAGNOSIS BRAKE PAD SENSOR CIRCUIT SELF-DIAGNOSTIC SYSTEM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Rear seat control system does not operate.	Rear seat return switch circuit Rear RH or LH seat ECU Passenger side J/B ECU	REAR SEAT RETURN SWITCH CIRCUIT HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE

HINT:

When the Passenger Side J/B ECU-related devices are to be checked, select the "BODY NO. 3" from the MENU of the LEXUS hand-held tester.