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Problem Symptoms Table

Display function 

PROBLEM SYMPTOMS REFERENCE CHART

Symptom Suspected area See
Pressing power switch does not turn on system. 1. Multi-display power source circuit MULTI-DISPLAY POWER SOURCE CIRCUIT 
2. AVC-LAN circuit AVC-LAN CIRCUIT 
3. Multi-display -
No image appears on multi-display. 1. Proceed to "NO IMAGE APPEARS ON MULTI-DISPLAY " NO IMAGE APPEARS ON MULTI-DISPLAY 
2. Multi-display power source circuit MULTI-DISPLAY POWER SOURCE CIRCUIT 
3. Illumination circuit ILLUMINATION CIRCUIT 
4. AVC-LAN circuit AVC-LAN CIRCUIT 
5. Multi-display -
Illumination for panel switch does not come on with TAIL switch on. 1. Proceed to "ILLUMINATION FOR PANEL SWITCH DOES NOT COME ON WITH TAIL SWITCH ON " ILLUMINATION FOR PANEL SWITCH DOES NOT COME ON WITH TAIL SWITCH ON 
2. Illumination circuit ILLUMINATION CIRCUIT 
3. Multi-display -
Display does not dim when light control switch is turn on. 1. Proceed to "DISPLAY DOES NOT DIM WHEN LIGHT CONTROL SWITCH IS TURN ON " DISPLAY DOES NOT DIM WHEN LIGHT CONTROL SWITCH IS TURN ON 
2. Illumination circuit ILLUMINATION CIRCUIT 
3. Multi-display -
Power does not turn off (The screen remains on). 1. Multi-display power source circuit MULTI-DISPLAY POWER SOURCE CIRCUIT 
2. Multi-display -
Panel switches do not function. 1. Proceed to "PANEL SWITCHES DO NOT FUNCTION " PANEL SWITCHES DO NOT FUNCTION 
2. Steering pad switch circuit STEERING PAD SWITCH CIRCUIT 
3. Multi-display power source circuit MULTI-DISPLAY POWER SOURCE CIRCUIT 
4. Multi-display -
Touch panel switch does not function. 1. Proceed to "TOUCH PANEL SWITCH DOES NOT FUNCTION " TOUCH PANEL SWITCH DOES NOT FUNCTION 
2. Steering pad switch circuit STEERING PAD SWITCH CIRCUIT 
3. Multi-display power source circuit MULTI-DISPLAY POWER SOURCE CIRCUIT 
4. Multi-display -
Navigation screen is not displayed. 1. Display signal circuit between navigation ECU and multi-display DISPLAY SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND MULTI-DISPLAY 
2. Map disc -
3. Navigation ECU -
4. Multi-display -
Navigation screen flicker or color distortion. 1. Proceed to "SCREEN FLICKER OR COLOR DISTORTION " SCREEN FLICKER OR COLOR DISTORTION 
2. Display signal circuit between navigation ECU and multi-display DISPLAY SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND MULTI-DISPLAY 
3. Navigation ECU -
4. Multi-display -
Navigation function switches can be operated while vehicle is running. Vehicle speed signal circuit between multi-display and combination meter VEHICLE SPEED SIGNAL CIRCUIT BETWEEN MULTI-DISPLAY AND COMBINATION METER 

Navigation function 

NAVIGATION FUNCTION CHART

Symptom Suspected area See
Map disc cannot be inserted. 1. Proceed to "MAP DISC CANNOT BE INSERTED " MAP DISC CANNOT BE INSERTED 
2. Navigation ECU power source circuit NAVIGATION ECU POWER SOURCE CIRCUIT 
3. Navigation ECU -
Map disc cannot be ejected. 1. Proceed to "MAP DISC CANNOT BE EJECTED " MAP DISC CANNOT BE EJECTED 
2. Navigation ECU power source circuit NAVIGATION ECU POWER SOURCE CIRCUIT 
3. Navigation ECU -
Vehicle position mark deviates greatly. 1. Proceed to "VEHICLE POSITION MARK DEVIATES GREATLY " VEHICLE POSITION MARK DEVIATES GREATLY 
2. GPS antenna -
3. Navigation ECU -
Cursor or map rotates when vehicle is stopped. 1. Proceed to "CURSOR OR MAP ROTATES WHEN VEHICLE IS STOPPED " CURSOR OR MAP ROTATES WHEN VEHICLE IS STOPPED 
2. Navigation ECU -
Vehicle position mark is not updated. 1. Proceed to "VEHICLE POSITION MARK IS NOT UPDATED " VEHICLE POSITION MARK IS NOT UPDATED 
2. Map disc -
3. Navigation ECU -
Current position display does not appear. 1. Proceed to "CURRENT POSITION DISPLAY DOES NOT APPEAR " CURRENT POSITION DISPLAY DOES NOT APPEAR 
2. Map disc -
3. GPS antenna -
4. Navigation ECU -
GPS mark is not displayed. 1. Proceed to "GPS MARK IS NOT DISPLAYED " GPS MARK IS NOT DISPLAYED 
2. GPS antenna -
3. Navigation ECU -
Voice guidance does not function. 1. Proceed to "VOICE GUIDANCE DOES NOT FUNCTION " VOICE GUIDANCE DOES NOT FUNCTION 
2. Navigation voice speaker circuit NAVIGATION VOICE SPEAKER CIRCUIT 
3. Map disc -
4. Navigation ECU -
5. Stereo component amplifier -
Map display incomplete. 1. Proceed to "MAP DISPLAY INCOMPLETE " MAP DISPLAY INCOMPLETE 
2. Map disc -
3. Navigation ECU -
Route cannot be calculated. 1. Proceed to "ROUTE CANNOT BE CALCULATED " ROUTE CANNOT BE CALCULATED 
2. Map disc -
3. Navigation ECU -
Voice recognition difficulty. 1, Proceed to "VOICE RECOGNITION DIFFICULTY " VOICE RECOGNITION DIFFICULTY 
2. Navigation ECU -
Voice is not recognized. 1. Proceed to "VOICE IS NOT RECOGNIZED " VOICE IS NOT RECOGNIZED 
2. Microphone circuit between overhead J/B and multi-display MICROPHONE CIRCUIT BETWEEN OVERHEAD J/B AND MULTI-DISPLAY 
3. Microphone circuit between multi-display and navigation ECU MICROPHONE CIRCUIT BETWEEN MULTI-DISPLAY AND NAVIGATION ECU 
4. Steering pad switch circuit STEERING PAD SWITCH CIRCUIT 
5. Microphone -
6. Microphone amplifier -
7. Navigation ECU -
Speed signal does not change in the navigation check mode. Vehicle speed signal circuit between navigation ECU and combination meter VEHICLE SPEED SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND COMBINATION METER 
Reverse signal does not change in the navigation check mode. Reverse Signal Circuit REVERSE SIGNAL CIRCUIT 

Steering pad switch function 

STEERING PAD SWITCH FUNCTION CHART

Symptom Suspected area See
The system cannot be operated by the steering pad switch. 1. Steering pad switch circuit STEERING PAD SWITCH CIRCUIT 
2. Radio receiver -
3. Air conditioning amplifier -
Illumination for steering pad switch does not come on with tail switch on. 1. Illumination circuit ILLUMINATION CIRCUIT 
2. Radio receiver -
3. Air conditioning amplifier -
Cellular phone registration failure, phone directory transfer failure. Proceed to "CELLULAR PHONE REGISTRATION FAILURE, PHONE DIRECTORY TRANSFER FAILURE " CELLULAR PHONE REGISTRATION FAILURE, PHONE DIRECTORY TRANSFER FAILURE 
Cellular phone cannot send / receive. 1. Proceed to "CELLULAR PHONE CANNOT SEND / RECEIVE " CELLULAR PHONE CANNOT SEND / RECEIVE 
2. Steering pad switch circuit STEERING PAD SWITCH CIRCUIT 
3. Multi-display -
Cannot call in a certain place. Proceed to "CANNOT CALL IN A CERTAIN PLACE " CANNOT CALL IN A CERTAIN PLACE 
The other caller's voice cannot be heard, is too quiet, or distorted. 1. Proceed to "THE OTHER CALLER'S VOICE CANNOT BE HEARD, IS TOO QUIET, OR DISTORTED " THE OTHER CALLER'S VOICE CANNOT BE HEARD, IS TOO QUIET, OR DISTORTED 
2. Multi-display -
The other caller cannot hear your voice, or your voice is too quiet or distorted. 1. Proceed to "THE OTHER CALLER CANNOT HEAR YOUR VOICE, OR YOUR VOICE IS TOO QUIET OR DISTORTED " THE OTHER CALLER CANNOT HEAR YOUR VOICE, OR YOUR VOICE IS TOO QUIET OR DISTORTED 
2. Microphone circuit between overhead J/B and multi-display MICROPHONE CIRCUIT BETWEEN OVERHEAD J/B AND MULTI-DISPLAY 
3. Microphone -
4. Microphone amplifier -
5. Multi-display -