LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation System - Diagnostics >> Problem Symptoms Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table

NAVIGATION SYSTEM PROBLEM SYMPTOMS

Flow Chart No./Symptom See
1 When Pressing "PWR/VOL" Switch, Screen Remains Black. WHEN PRESSING "PWR/VOL" SWITCH, SCREEN REMAINS BLACK 
2 Panel Switch Does Not Function. PANEL SWITCH DOES NOT FUNCTION 
3 Sound Quality Is Bad In All Modes, (Sound Is Low) SOUND QUALITY IS BAD IN ALL MODES (SOUND IS LOW) 
4 Map Disc Cannot Be Inserted. MAP DISC CANNOT BE INSERTED 
5 Current Position Screen Is Not Displayed, (Disc Caution Screen Does Not Change) CURRENT POSITION SCREEN IS NOT DISPLAYED (DISC CAUTION SCREEN DOES NOT CHANGE) 
6 Screen Cannot Be Dimmed When Light Control Switch Is Turned To "TAIL" Position. SCREEN CANNOT BE DIMMED WHEN LIGHT CONTROL SWITCH IS TURNED TO "TAIL" POSITION 
7 Driving Directions Opposite To Moving Direction Of Vehicle Position Mark. DRIVING DIRECTIONS OPPOSITE TO MOVING DIRECTION OF VEHICLE POSITION MARK 
8 Vehicle Icon Considerably Deviates. VEHICLE ICON CONSIDERABLY DEVIATES 
9 Gps Mark Is Not Displayed. GPS MARK IS NOT DISPLAYED 
10 Voice Navigation Cannot Be Heard/Voice Navigation Is Low. VOICE NAVIGATION CANNOT BE HEARD/VOICE NAVIGATION IS LOW 
11 Vehicle Icon Rotates Arbitrarily/Map Rotates Arbitrarily. VEHICLE ICON ROTATES ARBITRARILY/MAP ROTATES ARBITRARILY 
12 CD Cannot Be Inserted/CD Is Soon Ejected. CD CANNOT BE INSERTED/CD IS SOON EJECTED 
13 CD Cannot Be Ejected. CD CANNOT BE EJECTED 
14 Only CD Has Bad Sound, (Sound Is Low) ONLY CD HAS BAD SOUND (SOUND IS LOW) 
15 CD Sound Skips. CD SOUND SKIPS 
16 Radio Cannot Receive, (Receiving Condition Is Bad) RADIO CANNOT RECEIVE (RECEIVING CONDITION IS BAD) 
17 Noise Occurs. NOISE OCCURS 
18 Disc Player Changer Screen Is Not Displayed, (Both Sound And Screen Are Not Switched) DISC PLAYER CHANGER SCREEN IS NOT DISPLAYED (BOTH SOUND AND SCREEN ARE NOT SWITCHED) 
19 Only Disc Player Changer Has Bad Sound, (Sound Is Low) ONLY DISC PLAYER CHANGER HAS BAD SOUND (SOUND IS LOW) 
20 The Sound Of Only Disc Player Changer Is Not Heard From Speaker. THE SOUND OF ONLY DISC PLAYER CHANGER IS NOT HEARD FROM SPEAKER 

EXAMPLES OF MISUNDERSTANDING SYMPTOMS AS MALFUNCTIONS 

NAVIGATION SYSTEM MISUNDERSTANDING SYMPTOMS AS MALFUNCTION

Condition Cause Procedure To Recover
The Screen Is Too Dark Or Too Bright, When The Screen Is Changed Between Navigation And Audio The Contrast Set Up Of The Screen Between Navigation And Audio Is Different. The Contrast Needs To Be Set Up For Each Of The Navigation And Audio Screen. *Navigation: Press "DIDPLAY" And Adjust By "BRIGHTNESS" Switch. *AUDIO: Press "DISPLAY" And Adjust By "CONTRAST" Switch.
Pressing "NAVI" Switch Or "MAP" Switch Does Not Display The Navigation Screen. While The Audio Power Is Off, Switches Except Power Switch Cannot Be Used. Press "PWR/VOL" Switch To Use The Navigation System.