Section 323 (LEXUS Navigation System (Diagnostics))
WARNING: This page is about a different car, the 2003 Lexus GS 430 and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- LEXUS Navigation System 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 "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 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 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 change to the night mode color.
- 20. Vehicle position is deviated from correct point badly.
- 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. Radio reception poor.
- 26. Cassette tape cannot be inserted.
- 27. Cassette tape cannot be eject.
- 28 Any speaker does not work.
- 29. CD Magazine Connot Be Inserted
- 30 CD magazine inserted, but no power.
- 31. Power coming in, but CD auto changer not operating
- 32. Sound jumps
- 33. Sound quality poor (volume faint)
- 34. CD magazine will not be ejected.
- 35. Any speaker does not work
- 36. No power coming in.
- 37. Any speaker does not work.
- 38. No power coming, but woofer amplifier not operating.
- 39. Noise occurs
- 40. Noise produced by vibration or shock while driving
- 41. Noise produced when engine starts
- AVC-LAN (Communication bus) Circuit
- Gateway ECU (AVC-LAN adapter) circuit
- Inspection Procedure