Section 516 (LEXUS Navigation System - Diagnosis)
WARNING: This page is about a different car, the 2004 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
- Diagnostic Trouble Code Chart
- Parts Location
- Terminals Of Ecu
- Problem Symptoms Table
- Circuit Inspection
- Black screen (Nothing displayed)
- No sound with POWER switch pressed. ("Audio OFF" on audio screen)
- No navigation screen displayed when "MAP", "Menu", or "DEST" switch pressed. (Screen cannot be switched.)
- No corresponding screen displayed when "Audio" or "Information" switch pressed.
- No navigation displayed, "Audio OFF" on audio screen and no audio sound.
- Screen cannot be dimmed in night time.
- Navigation screen is not stabilized (Synchronous error).
- Color on navigation screen is unusual (RGB signal error).
- Black screen appears when "MAP", "Menu" or "DESTINATION" switch pressed.
- Sound of radio, cassette tape or CD only cannot be heard from speaker.
- No sound (radio, cassette tape, DVD) can be heard from driver side door speaker only.
- Map DISC cannot be inserted.
- MAP screen display does not appear. (Disc Caution screen does not change)
- Map is displayed in white or blue screen. (Switches and vehicle position mark is displayed)
- Touch switch does not function. (Navigation screen only)
- Touch switch does not function. (A/C control screen only)
- Panel switch does not function. (Navigation screen only)
- Panel Switch Does Not Function (A/C control only)
- Navigation screen cannot changed to the night mode color.
- Vehicle position is badly deviated from correct point.
- GPS mark does not appear.
- No voice navigation.
- Vehicle position rotates without control. (Map rotates without control)
- Driving direction is opposite to moving direction of vehicle position mark.
- Navigation system cannot be operated with voice recognition.
- Any speaker does not work. (DVD sound only)
- DVD Magazine Cannot Be Inserted
- DVD magazine inserted, but no power.
- Power comes in, but DVD auto changer does not operate.
- Sound jumps (DVD sound only).
- DVD magazine will not be ejected.
- Cellular Phone Registration Failure, Phone Directory Transfer Failure
- The Cellular Phone cannot Send/Receive
- Cannot Call in a Certain Place
- Voice on Phone Cannot be Heard, too Quiet, or Distorted
- 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