General Information: Notes

WARNING: This page is about a different car, the 2003 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

A large number of ECU controlled systems are used in LEXUS ES300. In general, the ECU controlled system is considered to be a very intricate system requiring high level of technical knowledge and expert skill to troubleshoot. The fact is, however, that if you proceed to inspect the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. This information is designed through emphasis of the above standpoint to help service technicians perform an accurate and effective troubleshooting, and is compiled for the following major ECU controlled systems. The troubleshooting procedure and how to make use of it are described on the following information.

GENERAL INFORMATION INDEX

System	Go To
1. SFI System	SYSTEM & COMPONENT TESTING
2. Electronic Modulated Suspension System	ELECTRONIC
3. ABS with EBD System	ANTI-LOCK BRAKE SYSTEM - WITH EBD DIAGNOSIS
4. ABS with EBD & BA & TRAC & VSC System	ANTI-LOCK BRAKE SYSTEM - WITH EBD/BA/TRAC/ VS
5. Electronic Controlled Automatic Transmission [ECT]	AUTOMATIC TRANSAXLE - DIAGNOSIS
6. Air Conditioning System	AIR CONDITIONING SYSTEM - DIAGNOSIS
7. Supplemental Restraint System	AIR BAG RESTRAINT SYSTEMS
8. Lighting System	LIGHTING SYSTEM - DIAGNOSIS
9. Wiper and Washer System	WIPER & WASHER - DIAGNOSIS
10. Audio System	AUDIO SYSTEM - DIAGNOSIS
11. LEXUS Navigation System	LEXUS NAVIGATION SYSTEM - DIAGNOSIS
12. Power Window Control System	POWER WINDOW CONTROL SYSTEM - DIAGNOSTICS
13. Power Mirror Control System	POWER MIRROR CONTROL SYSTEM - DIAGNOSIS
14. Combination Meter	COMBINATION METER - DIAGNOSIS
15. Front Power Seat Control System (with memory)	FRONT POWER SEAT CONTROL SYSTEM (WITH MEMORY)
16. Power Door Lock Control System	POWER DOOR LOCK - DIAGNOSIS
17. Wireless Door Lock Control System	WIRELESS DOOR LOCK - DIAGNOSIS
18. Luggage Comportment Door Opener System	LUGGAGE COMPARTMENT DOOR OPENER SYSTEM - DIAG
19. Key Unlock Warning System	KEY UNLOCK WARNING SYSTEM - DIAGNOSIS
20. Engine Immobiliser System	ENGINE IMMOBILIZER SYSTEM - DIAGNOSIS
21. Theft Deterrent System	THEFT DETERRENT SYSTEM - DIAGNOSIS
22. Multiplex Communication System	MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSIS
23. Cruise Control System	CRUISE CONTROL SYSTEM - DIAGNOSIS