Section 21 (LEXUS Navigation System - Diagnostics)
WARNING: This page is about a different car, the 2005 Lexus LX 470. 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
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnostic Trouble Code Chart
- Parts Location
- 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 "DEST" switch pressed. (Screen cannot be switched.)
- 4. No corresponding screen displayed when "Audio" or "Information" 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 is 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, DVD) 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 is displayed)
- 15. Touch switch does not function. (Navigation screen only)
- 16. Touch switch does not function. (A/C control screen only)
- 17. Panel switch does not function. (Navigation screen only)
- 18. Panel Switch Does Not Function (A/C control only)
- 19. Navigation screen cannot changed to the night mode color.
- 20. Vehicle position is badly deviated from correct point.
- 21. GPS mark does not appear.
- 22. No voice navigation.
- 23. Vehicle position rotates without control. (Map rotates without control)
- 24. Driving direction is opposite to moving direction of vehicle position mark.
- 25. Navigation system cannot be operated with voice recognition.
- 26. Any speaker does not work. (DVD sound only)
- 27. DVD Magazine Cannot Be Inserted
- 28. DVD magazine inserted, but no power.
- 29. Power comes in, but DVD auto changer does not operate.
- 30. Sound jumps (DVD sound only).
- 31. DVD magazine will not be ejected.
- 32. Cellular Phone Registration Failure, Phone Directory Transfer Failure
- 33. The Cellular Phone cannot Send/Receive
- 34. Cannot Call in a Certain Place
- 35. Voice on Phone Cannot be Heard, too Quiet, or Distorted
- 36. Own Voice Cannot be Heard, Quiet or Distorted
- Power Source Circuit (Navigation ECU)
- Power Source Circuit (Multi-Display Assembly)
- Power Source Circuit (Network Gateway ECU)
- Reverse Signal Circuit
- Speaker Circuit
- Display Signal Circuit
- AVC-LAN (Communication bus) Circuit