Problem Symptoms Table

HINT:

Before performing verification listed in the table below, check the fuse and relay.
Methods used to verify the cause of the problem are listed in order of probability in the verification column.

Display function

PROBLEM SYMPTOMS TABLE - DISPLAY FUNCTION

Symptom	Verification
Black screen (No image appears on navigation/audio screen).	"BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION AND AUDIO SCREEN)" Illumination circuit Power source circuit (multi-display) Replace multi-display
Illumination for panel switch does not come on with TAIL switch on.	"ILLUMINATION FOR PANEL SWITCH DOES NOT COME ON WITH TAIL SWITCH ON" Illumination circuit Replace multi-display
Display does not dim (Night Screen) with TAIL switch on.	"DISPLAY DOES NOT DIM (NIGHT SCREEN) WITH TAIL SWITCH ON" Illumination circuit Replace multi-display
Power does not turn off (The screen remains on).	Power source circuit (multi-display) Replace multi-display
Panel switch does not function.	"PANEL SWITCH DOES NOT FUNCTION" Steering pad switch circuit Power source circuit (multi-display) Replace multi-display
Touch panel switch does not function.	"TOUCH PANEL SWITCH DOES NOT FUNCTION" Steering pad switch circuit Power source circuit (multi-display) Replace multi-display
Screen is distorted.	Display signal circuit (navigation ECU - multi-display) Replace navigation ECU Replace multi-display
Screen flicker or color distortion.	"SCREEN FLICKER OR COLOR DISTORTION" Display signal circuit (navigation ECU - multi-display) Replace navigation ECU Replace multi-display
No switches function while vehicle is running	Speed signal circuit (multi-display - combination meter assy)

Navigation function

PROBLEM SYMPTOMS TABLE - NAVIGATION FUNCTION

Symptom	Verification
Map disc cannot be inserted.	"MAP DISC CANNOT BE INSERTED" Power source circuit (navigation ECU) Replace navigation ECU
Map disc cannot be ejected.	Power source circuit (navigation ECU) Replace navigation ECU
Vehicle position mark deviates greatly.	"VEHICLE POSITION MARK DEVIATES GREATLY" Replace GPS antenna assy Replace navigation ECU
Cursor or map rotates when vehicle is stopped.	"CURSOR OR MAP ROTATES WHEN VEHICLE IS STOPPED" Replace navigation ECU
Vehicle position mark is not updated.	"VEHICLE POSITION MARK IS NOT UPDATED" Replace map disc Replace navigation ECU
Current position display does not appear.	"CURRENT POSITION DISPLAY DOES NOT APPEAR" Replace map disc Replace navigation ECU
GPS mark is not displayed.	"GPS MARK IS NOT DISPLAYED" Replace GPS antenna assy Replace navigation ECU
Voice guidance does not function.	"VOICE GUIDANCE DOES NOT FUNCTION" Mute signal circuit (stereo component amplifier assy -navigation ECU) Speaker circuit (navigation voice) Replace map disc Replace stereo component amplifier assy Replace navigation ECU
Map display incomplete	"MAP DISPLAY INCOMPLETE" Replace map disc Replace navigation ECU
Route cannot be calculated.	"ROUTE CANNOT BE CALCULATED" Replace map disc Replace navigation ECU
Voice recognition difficulty	"VOICE RECOGNITION DIFFICULTY" Replace navigation ECU
Voice is not recognized.	"VOICE IS NOT RECOGNIZED" Microphone circuit (overhead J/B-multi-display) Microphone circuit (multi-display-navigation ECU) Replace microphone Replace microphone amplifier Replace navigation ECU Replace multi-display

Steering pad function

PROBLEM SYMPTOMS TABLE - STEERING PAD FUNCTION

Symptom	Verification
Voice navigation cannot be operated with steering pad switch.	Steering pad switch circuit Replace steering pad switch LH RH Replace navigation ECU

Bluetooth function

PROBLEM SYMPTOMS TABLE - BLUETOOTH FUNCTION

Symptom	Verification
Cellular phone registration failure, phone directory transfer failure	"CELLULAR PHONE REGISTRATION FAILURE, PHONE DIRECTORY TRANSFER FAILURE"
The cellular phone cannot send/receive.	"THE CELLULAR PHONE CANNOT SEND/RECEIVE" "OWN VOICE CANNOT BE HEARD, TOO QUIET OR DISTORTED" Cellular phone voice circuit (multi-display - navigation ECU) Replace navigation ECU Replace multi-display
Cannot call in a certain place.	"CANNOT CALL IN A CERTAIN PLACE"
Voice on phone cannot be heard, too quiet, or distorted.	"VOICE ON PHONE CANNOT BE HEARD, TOO QUIET OR DISTORTED" Cellular phone voice circuit (multi-display - navigation ECU) Replace navigation ECU Replace multi-display
Own voice cannot be heard, too quiet or distorted.	"OWN VOICE CANNOT BE HEARD, TOO QUIET OR DISTORTED"