Section 858 (LEXUS Navigation System - Diagnosis)
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.
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Pre-Check
- Diagnostic Trouble Code Chart
- Parts Location
- Terminals Of Ecu
- Problem Symptoms Table
- Circuit Inspection
- 1. Black screen (Nothing displayed)
- 2. No sound with POWER switch pressed. ("Audio OFF" on audio screen)
- 3. No navigation screen displayed when "MAP", "MENU", or "DESTINATION" switch pressed. (Screen cannot be switched.)
- 4. No corresponding screen displayed when "AUDIO" or "A/C" switch pressed.
- 5. No navigation displayed, "Audio OFF" on audio screen and no audio sound.
- 6. Screen cannot be dimmed in night time.
- 7. Navigation screen not stabilized (Synchronous error).
- 8. Color on navigation screen is unusual (RGB signal error).
- 9. Black screen appears when "MAP", "MENU" or "DESTINATION" switch pressed.
- 10. Sound of radio, cassette tape or CD only cannot be heard from speaker.
- 11. No sound (radio, cassette tape, CD) can be heard from driver side door speaker only.
- 12. Map DISC cannot be inserted.
- 13. MAP screen display does not appear. (Disc Caution screen does not change.)
- 14. Map is displayed in white or blue screen. (Switches and vehicle position mark are displayed.)
- 15. Navigation screen cannot change to night mode color.
- 16. Touch switch does not function. (Navigation screen only)
- 17. Vehicle position is deviated from correct point badly.
- 18. GPS mark does not appear.
- 19. No voice navigation.
- 20. Vehicle position mark rotates without control. (Map rotates without control)
- 21. Driving direction is opposite to moving direction of vehicle position mark.
- 22. Radio broadcast cannot be received. (Bad reception)
- 23. Cassette tape cannot be inserted.
- 24. Cassette tape cannot be ejected.
- 25. CD can not be inserted.
- 26. CD cannot be ejected.
- 27. No AM, FM or CD screen is displayed.
- 28. Audio screen is not displayed.
- 29. Panel switches do not function.
- 30. Touch SW on air conditioner screen does not function.
- 31. Turning Light Control switch to "TAIL" does not light up panel switches.
- 32. Turning Light Control switch to "TAIL" does not light up radio receiver switches.
- 33. Audio system cannot be operated with Steering PAD switch. (It can be operated with Panel / Touch switches.)
- 34. Audio system cannot be operated with air conditioner switches on the Rear Controller. (It can be operated with Panel / Touch switches.)
- 35. Navigation system cannot be operated with voice recognition.
- 36. Cellular mobile telephone screen is not displayed on multi display. (Navigation system screen is displayed.)
- 37. Cellular mobile phone is in abnormal operation. (Navigation system can be operated with the voice recognition.)
- 38. Cellular phone cannot be operated with Steering pad switch. (It can be operated with Panel/Tough switches.)
- 39. Pressing the "Call" or "HOOK" switch does not activate voice recognition.
- AVC-LAN (Communication bus) Circuit