General Information: Notes
A large number of ECU controlled systems are used in the LEXUS LS430. In general, ECU controlled v terns are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU controlled system's circuits one by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform effective troubleshooting, accurate diagnoses and necessary repairs. Detailed information and troubleshooting procedures on major ECU controlled systems in this vehicle are outlined below:
ECU CONTROLLED SYSTEMS TROUBLESHOOTING PROCEDURE
| System | See |
|---|---|
| 1. SFI SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. AIR SUSPENSION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 3. TIRE PRESSURE WARNING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 4. ABS with EBD & BA & TRAC & VSC System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 5. ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION [ECT] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 6. PROGRESSIVE POWER STEERING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 7. POWER TILT & POWER TELESCOPING STEERING COLUMN | HOW TO PROCEED WITH TROUBLESHOOTING |
| 8. STEERING LOCK SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 9. AIR CONDITIONING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 10. SUPPLEMENTAL RESTRAINT SYSTEM | DIAGNOSTICS |
| 11. POWER SHOULDER BELT ANCHORAGE SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 12. SELT BELT WARNING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 13. LIGHTING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 14. WIPER & WASHER SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 15. AUDIO SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 16. LEXUS NAVIGATION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 17. REAR VIEW MONITOR SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 18. COMBINATION METER | HOW TO PROCEED WITH TROUBLESHOOTING |
| 19. POWER WINDOW CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 20. POWER MIRROR CONTROL SYSTEM [W/ MEMORY] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 21. DEFOGGER SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 22. CLEARANCE SONAR SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 23. FRONT POWER SEAT CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 24. REAR POWER SEAT CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 25. CLIMATE CONTROL SEAT SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 26. POWER DOOR LOCK CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 27. WIRELESS DOOR LOCK CONTROL SYSTEM [W/ SMART KEY SYSTEM] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 28. WIRELESS DOOR LOCK CONTROL SYSTEM [W/O SMART KEY SYSTEM] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 29. DOOR CLOSER SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 30. SMART KEY SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 31. LUGGAGE COMPARTMENT DOOR OPENER & CLOSER SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 32. FUEL LID OPENER SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 33. KEY REMINDER WARNING SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 34. ENGINE IMMOBILIZER SYSTEM [W/ SMART KEY SYSTEM] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 35. ENGINE IMMOBILIZER SYSTEM [W/O SMART KEY SYSTEM] | HOW TO PROCEED WITH TROUBLESHOOTING |
| 36. SLIDING ROOF SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 37. LEXUS LINK SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 38. THEFT DETERRENT SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 39. MULTIPLEX COMMUNICATION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 40. CAN COMMUNICATION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 41. CRUISE CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 42. DYNAMIC LASER CRUISE CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |