Circuit Inspection: Notes

Black screen (Nothing displayed)
Inspection Procedure
1. Check the ECU-IG fuse.
  NG: Replace the fuse.
  
  OK: Go to Next Step
2. Check multi display.
  Preparation:
  
  Disconnect the multi display connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness or connector.
  
  OK: Replace the multi display.
No sound with POWER switch pressed. ("Audio OFF" on audio screen)
Inspection Procedure
1. Service check mode. (Check radio receiver assembly)
  NG: Troubleshoot for each diagnosis.
  
  OK: Go to Next Step
2. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness or connector.
  
  OK: Replace the radio receiver assembly.
No navigation screen displayed when "MAP", "Menu", or "DEST" switch pressed. (Screen cannot be switched.)
Inspection Procedure
1. Service check mode. (Check the navigation ECU)
  NG: Troubleshoot for each diagnosis.
  
  OK: Go to step 6 .
  
  Ncon: Go to Next Step
2. Check the navigation ECU.
  Preparation:
  
  Disconnect the navigation ECU connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness or connector.
  
  OK: Go to Next Step
3. Check the navigation ECU.
  Check:
  
  Check terminal R, G and B.
  
  OK: R, G, B: See "Naavigation ECU" of "TERMINAL OF ECU".
  
  NG: Replace the navigation ECU.
  
  OK: Go to Next Step
4. Check the multi display.
  Preparation:
  
  Disconnect the multi display connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness or connector.
  
  OK: Go to Next Step
5. Check the multi display.
  Check:
  
  Check terminal R, G and B.
  
  OK: R, G, B: See "multi display" of "TERMINAL OF ECU".
  
  NG: Replace the multi display.
  
  OK: Replace the multi display
6. All of the switches (MAP, Menu, DEST etc.) does not function.
  NO: Replace the center cluster module control.
  
  YES: Go to Next Step
7. Check each switch (A/C switch e.t.c.) of the center cluster module control does not function.
  NO: Replace the center cluster module control.
  
  YES: Replace the multi display.
No corresponding screen displayed when "Audio" or "Information" switch pressed.
Inspection procedure
1. Check "AVC-LAN communication circuit" (See AVC-LAN (Communication bus) Circuit ).
  NG: Replace or repair AVC-LAN circuit.
  
  OK: Go to Next Step
2. "Audio" and "Information" switch does not function.
  NG: Replace the center cluster mudule control.
  
  OK: Go to Next Step
3. Check each switch (A/C switch e.t.c.) of the center cluster module control does not function.
  NG: Replace the center cluster mudule control.
  
  OK: Replace the multi display.
No navigation displayed, "Audio OFF" on audio screen and no audio sound.
Inspection procedure
1. Service check mode.
  NG: Troubleshoot for each diagnosis.
  
  OK: Go to Next Step
2. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Go to Next Step
3. Check "AVC-LAN communication circuit" (See AVC-LAN (Communication bus) Circuit ).
  NG: Replace the AVC-LAN circuit or radio receiver assembly.
  
  OK: Replace the multi display
4. Screen cannot be dimmed in night time.
  Inspection procedure
  1. Check if the screen is dimmed at night. (With the light control switch ON), do all screens except the navigation screen appear in Night Mode?)
    NG: Check the light control switch.
    
    OK: Go to Next Step
  2. Check the multi display.
    Check:
    
    Check terminal TAIL.
    
    OK: TAIL: See "Multi display" of "TERMINAL OF ECU".
    
    NG: Replace or repair wire harness.
    
    OK: Go to Next Step
  3. Check the multi display.
    Preparation:
    
    Disconnect the multi display connector.
    
    Check:
    
    Check voltage terminals +B.
    
    OK: +B: 10 - 14 V
    
    Check:
    
    Check voltage terminal ACC when turn ignition switch ACC or ON position.
    
    OK: ACC: 10 - 14 V
    
    Check:
    
    Check continuity terminal GND.
    
    OK: GND: Continuity
    
    NG: Replace or repair wire harness.
  OK: Replace the multi display.
Navigation screen not stabilized (Synchronous error).
Inspection procedure
1. Check the navigation ECU.
  Check:
  
  Check terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check terminal SYNC, VR or VG.
  
  OK: SYNC, VR, VG: See "Navigation ECU" of "TERMINAL OF ECU"
  
  NG: Replace the wire harness when all terminals are faulty. Replace the wire harness when the SYNC terminal is faulty.
  
  OK: Replace the multi display.
Color on navigation screen is unusual (RGB signal error).
Inspection procedure
1. Display check mode (Color bar check).
  NG: Replace the multi display.
2. Navigation check mode (Color bar check).
  NG: Go to step 4 .
  
  OK: Go to Next Step
3. Check the screen setting. (Day or Night mode)
  OK: Normal.
  
  NG: Go to Next Step
4. Check the navigation ECU.
  Check:
  
  Check terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check terminal R, G, B, VR or VG.
  
  OK: R, G, B, VR or VG: See "Navigation ECU" of "TERMINAL OF ECU"
  
  NG: Replace the wire harness when all terminals are faulty. Replace the wire harness when SYNC terminal is faulty.
  
  OK: Replace the multi display.
Black screen appears when "Present Location", "Menu" or "Set Designation" switch pressed.
Inspection procedure
1. Check the navigation ECU.
  Check:
  
  Check terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check terminal R, G, B, VR or VG.
  
  OK: R, G, B, VR or VG: See "Navigation ECU" of "TERMINAL OF ECU"
  
  NG: Replace the wire harness when all terminals are faulty. Replace the wire harness when SYNC terminal is faulty.
  
  OK: Replace the multi display.
Sound of radio, cassette tape or CD only cannot be heard from speaker.
Inspection procedure
1. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness or connector.
  
  OK: Replace the radio receiver assembly.
No sound (radio, cassette tape, CD) can be heard from driver side door speaker only.
Inspection procedure
1. Service check mode.
  NG: Troubleshoot for each diagnosis.
  
  OK: Go to Next Step
2. Check wire harness (between navigation ECU and radio receiver assembly).
  Preparation:
  
  Disconnect the navigation ECU and radio receiver assembly connector.
  
  Check:
  1. Check continuity between terminal AUI+ of navigation ECU connector and terminal FL+ of radio receiver assembly.
  2. Check continuity between terminal AUI- of navigation ECU connector and terminal FL- of radio receiver assembly.
  OK: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Go to Next Step
3. Check the navigation system voice.
  OK: Go to step 6 .
  
  NG: Go to Next Step
4. Check wire harness (between navigation ECU and driver side door speaker).
  Preparation:
  
  Disconnect the navigation ECU and driver side door speaker connector.
  
  Check:
  1. Check continuity between terminal AUO+ of navigation ECU connector and terminal 1 of driver side door speaker.
  2. Check continuity between terminal AUO- of navigation ECU connector and terminal 2 of driver side door speaker.
  OK: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Go to Next Step
5. Check the driver side door speaker.
  NG: Replace the speaker.
  
  OK: Replace the navigation ECU.
6. Check the navigation ECU.
  Check:
  
  Check terminal AUO+, AUO-, AUI+ and AUI-.
  
  OK: AUO+, AUO-, AUI+ and AUI-: See "Navigation ECU" of "TERMINAL OF ECU".
  
  NG: Replace the navigation ECU.
  
  OK: Replace the radio receiver assembly.
Map DISC cannot be inserted.
Inspection procedure
1. Check the MAP DISC.
  NG: Replace the MAP DISC.
  
  OK: Go to Next Step
2. Insert a MAP DISC without tilt.
  OK: Normal.
  
  NG: Go to Next Step
3. Check the navigation ECU.
  Preparation:
  
  Disconnect the navigation ECU connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Replace the navigation ECU

MAP screen display does not appear. (Disc Caution screen does not change)

Inspection procedure

Take appropriate measures according to the caution screen.
OK: Normal.

NG: Go to Next Step

Check map DISC.

NG: Replace the disc.

OK: Replace the navigation ECU.

CAUTION SCREEN

CAUTION MESSAGE

CAUSE

CORRECTIVE ACTION

Cover is open. Close it.

The cover of the map disk slot is open.

Close the cover,

No disc is set. Set a map disc.

No map disk is inserted.

Insert a proper map disc.

Data cannot be read properly. Check it for scratches or dirt.

Data cannot be read because the map disc is dirty or scratched.

Wipe off dirt on the both disc surface with soft cloth.

Data cannot be read. Check the correct map disc is set.

Something other than map disc is inserted.

Insert a correct map disc.

Due to high temperature of the player, data cannot be read.

Pick-up part of the player is heated to a high temperature.

Stop the vehicle at a shaded cool place and turn the ignition switch OFF. When confirming that the temperature of the navigation ECU has been lowered, turn the ignition switch ON.

Data cannot be read. Contact your sales dealer.

The player cannot read data from the map disc temporarily.

Turn the ignition switch OFF and ON.⁽¹⁾

⁽¹⁾	If the same caution screen appears again after turning the ignition switch ON, replace the navigation ECU.

Map is displayed in white or blue screen. (Switches and vehicle position mark is displayed)
Inspection procedure
1. Set the map scale to the max.
  OK: Normal.
  
  NOTE: Correct the current position and check it again.
  
  NG: Go to Next Step
2. Wipe the disc with a soft cloth, insert it again, and turn the ignition switch ON from OFF.
  NG: Replace the disc.
  
  OK: Normal.
  
  NOTE: If the trouble still occurs, replace the navigation ECU.
Navigation screen cannot change to the night mode color.
Inspection procedure
1. Check the setting. (Is it set to Day Mode in screen adjustment?)
  YES: Normal.
  
  NO: Go to Next Step
2. Check if the screen is dimmed at night. (With the light control switch ON, do all screens except the navigation screen appear in Night Mode?)
  NG: Go to step 5 .
  
  OK: Go to Next Step
3. Does the beep sound by operating switches on the navigation screen?
  OK: Replace the navigation ECU.
  
  NG: Go to Next Step
4. Check "AVC-LAN communication circuit" (See AVC-LAN (Communication bus) Circuit ).
  NG: Replace or repair AVC-LAN circuit.
  
  OK: Replace the navigation ECU.
5. Check the multi display.
  Check:
  
  Check terminal TAIL.
  
  OK: TAIL: See "Multi Display" of "TERMINAL OF ECU".
  
  OK: Replace the multi display.
  
  NG: Replace or repair wire harness.
Touch switch does not function. (Navigation screen only)
Inspection procedure
1. Display check mode (Touch switch, Touch point screen).
  NG: Replace the multi display.
  
  OK: Go to Next Step
2. Check "AVC-LAN communication circuit" (See AVC-LAN (Communication bus) Circuit ).
  NG: Replace or repair AVC-LAN circuit.
  
  OK: Replace the navigation ECU.
Vehicle position is deviated from correct point badly.
Inspection procedure
1. Check the mark display. (At a place with a fine view, is GPS mark displayed or not?)
  NO: Go to step 7 .
  
  OK: Go to Next Step
2. Does the trouble occur in the specific area or not?
  YES: Normal. (If the vehicle is positioned in the place where it is difficult to be identified, the current vehicle position may be incorrectly displayed.)
  
  NO: Go to Next Step
3. Check the setting (Color of the automatic calibration button on the calibration screen).
  1. Green: Normal. (Drive the vehicle (10 km or more) until calibration is completed.
  2. Blue: Go to Next Step
4. Service check mode. (Is "58-43" displayed in the unit check mode of the navigation ECU?)
  YES: Troubleshoot for each diagnosis.
  
  NO: Go to Next Step
5. Navigation check mode (vehicle signal check mode: SPD).
  NG: Replace or repair speed sensor wire harness.
  
  OK: Go to Next Step
6. Recurrence Test (Confirm the phenomenon) (Correct the current position and drive the vehicle for a while with the GPS mark displayed).
  OK: Normal.
  
  NG: Replace the navigation ECU.
7. Check if the harness is caught or sharply bent or not.
  NG: Navigation antenna is surely connected.
  
  OK: Go to Next Step
8. Check optional components. (Does it become if the optionals such as the theft deterrent system is removed?)
  YES: Remove or change the position of the components.
  
  NOTE: Some optionals receive radio signals, and if this happens, GPS reception may be affected.
  
  NO: Go to Next Step
9. Is there anything such as a film stuck to the window?
  YES: Reception may be affected by a screen such as a film.
  
  NO: Go to Next Step
10. Service check mode. (Is "80-40, 41" is displayed in the unit check mode of the navigation ECU?)
  YES: Troubleshoot for each diagnosis.
  
  NO: Replace the navigation antenna.
  
  NOTE: If the trouble still occurs, replace the navigation ECU.
GPS mark does not appear.
Inspection procedure
1. Check the mark display. (At a place with a fine view, is GPS mark displayed or not?)
  YES: Normal.
  
  NO: Go to Next Step
2. Check if the harness is caught or sharply bent or not.
  NG: Navigation antenna is surely connected.
  
  OK: Go to Next Step
3. Check optional components. (Does it become normal if the optionals such as the theft deterrent system is removed?)
  YES: Remove or change the position of the components.
  
  NOTE: Some optionals receive radio signals, and if this happens, GPS reception may be affected.
  
  NO: Go to Next Step
4. Is there anything such as a film stuck to the window?
  YES: Reception may be affected by a screen such as a film.
  
  NO: Go to Next Step
5. Service check mode. (Is "80-40, 41" is displayed in the unit check mode of the navigation ECU?)
  YES: Troubleshoot for each diagnosis.
  
  NO: Replace the navigation antenna.
  
  NOTE: If the trouble still occurs, replace the navigation ECU.
No voice navigation.
Inspection procedure
1. Set the volume to the max in the menu screen.
  OK: Normal. (Voice navigation is not available. No destination is set, or the vehicle is running off the route.)
  
  NG: Go to Next Step
2. Check wire harness (navigation ECU and driver side door speaker).
  Preparation:
  
  Disconnect the navigation ECU connector and driver side door speaker connector.
  
  Check:
  1. Check continuity between terminal AUO+ of navigation ECU connector and terminal 1 of driver side door speaker.
  2. Check continuity between terminal AUO- of navigation ECU connector and terminal 2 of driver side door speaker.
  OK:
  
  Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Go to Next Step
3. Check the sound. (Check if the radio sound can be heard from the driver side door speaker.)
  OK: Replace the navigation ECU.
  
  NG: Replace the speaker.
Vehicle position rotates without control. (Map rotates without control)
Inspection procedure
1. Recheck. (While not rotating the vehicle, turn the ignition switch ON from OFF again.)
  OK: Normal. (While the vehicle was turning, the ignition switch was turned ON.)
  
  NG: Go to Next Step
2. System check mode. (Is "58-10" is displayed in the unit check mode of the navigation ECU?)
  YES: Replace the navigation ECU.
  
  NO: Go to Next Step
3. System check mode. (Is "58-43" is displayed in the unit check mode of the navigation ECU?)
  YES: Replace and repair SPD terminal wire harness.
  
  NO: Go to Next Step
4. Navigation check mode (vehicle signal check mode: SPD and gyro).
  OK: Replace the navigation ECU.
  
  NG: Replace or repair wire harness
Driving direction is opposite to moving direction of vehicle position mark.
Inspection procedure
1. Navigation check mode (vehicle signal check mode REV).
  OK: Replace the navigation ECU.
  
  NG: Go to Next Step
2. Check the navigation ECU.
  Check:
  
  Check terminal REV.
  
  OK: REV: See "Navigation ECU" of "TERMINAL OF ECU".
  
  OK: Replace the navigation ECU.
  
  NG: Replace or repair wire harness.
Radio reception poor.
Inspection procedure
1. Check the reception. (Select an AM or FM station band which signals are strong)
  YES: An electric wave environment is bad.
  
  NO: Go to Next Step
2. Are there any additional installation parts? (Telephone antenna, etc.)
  YES: Does the condition get better if removing them? Influence of additional installation parts.
  
  NO: Go to Next Step
3. Is the contact of the plug jack of the radio OK?
  NG: Take a measure for contact.
  
  OK: Is the antenna cord caught or broken?
Cassette tape cannot be inserted.
Inspection procedure
1. Is there a foreign object inside tape player?
  YES: Remove foreign object.
  
  NO: Go to Next Step
2. Is auto search button radio operating normally?
  NG: Radio assembly faulty.
  
  OK: Go to Next Step
3. Check the cassette tape for deformation or peeling-off of the label.
  NG: Replace cassette.
  
  OK: Go to Next Step
4. Is the tape slack?
  NG: Remove slack before using.
  
  OK: Replace the radio receiver assembly.
Cassette tape cannot be eject.
Inspection procedure
1. Check if ACC or DOME fuse is OK?
  NG: Replace fuse.
  
  OK: Go to Next Step
2. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness.
  
  NOTE: When sending it for repair, leave as it is without attempting to take it out by force.
  
  OK: Replace the radio receiver assembly.
CD cannot be inserted.
Inspection procedure
1. Check that a proper CD is inserted. (Is it a music CD and free from scratches or dirt?)
  NG: Replace the CD.
  
  OK: Go to Next Step
2. Check that the CD is not set upside down.
  NG: Use a proper CD.
  
  OK: Replace the radio receiver assembly.
  
  NOTE: When sending it for repair, leave as it is without attempting to take it out by force.
CD cannot be ejected.
Inspection procedure
1. Check if ACC or DOME fuse is OK?
  NG: Replace fuse.
  
  OK: Go to Next Step
2. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Replace the radio receiver assembly.
  
  NOTE: When sending it for repair, leave as it is without attempting to take it out by force.
No AM, FM or CD screen is displayed.
Inspection procedure
1. Check the sound. (Check if the sound of the radio, cassette or CD can be heard.)
  OK: System check mode. (Check radio receiver assembly)
  
  NG: Go to Next Step
2. Check the radio receiver assembly.
  Preparation:
  
  Disconnect the radio receiver assembly connector.
  
  Check:
  
  Check voltage terminals +B.
  
  OK: +B: 10 - 14 V
  
  Check:
  
  Check voltage terminal ACC when turn ignition switch ACC or ON position.
  
  OK: ACC: 10 - 14 V
  
  Check:
  
  Check continuity terminal GND.
  
  OK: GND: Continuity
  
  NG: Replace or repair wire harness.
  
  OK: Go to next step.
Check "AVC-LAN communication circuit" (See AVC-LAN (COMMUNICATION BUS) CIRCUIT ).
NG: Replace or repair AVC-LAN circuit.

OK: Replace the radio receiver assembly.