NO.8 DISPLAY SCREEN DOES NOT CHANGE TO THE NIGHT MODE. (FRONT AND REAR COMBINATION LIGHTS OPERATE NORMALLY.)

id0903e8802400

8

Display screen does not change to the night mode. (Front and rear combination lights operate normally.)

POSSIBLE CAUSE

• Improper setting of NAVI map indication
• Open or short circuit in TNS signal wiring harness (TNS signal related)
• LCD unit malfunction
• Poor connection of the LCD unit connector, terminal damage
• car-navigation unit malfunction
Note
• The car-navigation control switch is inoperatiove if the following circuit is malfunctioning:
- LCD unit connector (24-pin) I (SI01) -car-navigation unit (24-pin) N (SI01)
- LCD unit connector (24-pin) K (SI02) -car-navigation unit (24-pin) P (SI02)
• When the ignition switch is turned OFF, then ACC position, display screen changes to black.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Turn the ignition switch to the ON position.
• Does the display screen change to the night mode when the light switch is turned to the TNS position, and t the dimmer cancel switch is turned to OFF?
Yes
The system is normal.
No
Go to the next step.
2
• Press the "MENU" button.
• Select "Navigation Setup".
• Select "User settings".
• Input "MAP Mode".
• Is the "Map Mode" set to "Auto"?.
Yes
Go to the next step.
No
The system is normal.
Set the "Map Mode" to "Auto".
3
• Diagnostic function is started.
• Turn the light switch to TNS position.
• Inspect the "TNS" on the diagnosis check screen.
• Does the "TNS" indicate "ON"?
Yes
Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
4
• Turn the ignition switch to the LOCK position.
• Remove the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)
• Inspect the connection of the LCD unit connector (24-pin).
• Is the connector securely connected?
Yes
Go to the next step.
No
Securely connect the LCD connector.
5
• Disconnect the LCD unit connector (24-pin).
• Inspect both the LCD unit and wiring harness-side connector terminal V for poor connection (such as damaged/pulled-out pins, corrosion).
• Are all the pins normal?
Yes
Go to the next step.
No
If the LCD unit side connector is wrong
Replace the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)
If the wiring harness-side connector is wrong
Repair or replace the pins and/or the connector.
6
• Inspect the voltage of the LCD unit wiring harness-side connector (24-pin) terminal V (TNS signal)
• Is voltage B+ when the light switch is turned to the TNS position?
Yes
Replace the LCD unit (See LCD UNIT REMOVAL/INSTALLATION.), then go to the next step.
No
Inspect for TNS signal circuit.
Repair or replace if necessary.
8
• Does the system operate properlyr?
Yes
Troubleshooting is completed
No
Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)