Display Day/Night Mode Does Not Work Or Does Not Work Properly

Navigation System Symptom Troubleshooting - Display day/night mode does not work or does not work properly

Display day/night mode does not work or does not work properly

NOTE:
* Check the vehicle battery condition first Battery Test.
* Full brightness on the dashlights brightness control with the head lights turned on causes the system to stay in the day mode, even when the lights are on.
* Check any official Honda service website for more service information about the navigation system.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Turn the combination lighting switch to the parking light position.

Does the display change to day and night modes when turning the headlights on and off?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 2.

2. Determine possible failure area (audio-navigation unit, others):

Determine possible failure area (audio-navigation unit, others)
-1. Turn the combination lighting switch to the off position.

-2. Go into the System Diagnostic Mode, and use the Car Status diagnosis to check the ILL signal Navigation System Diagnostic Mode.

-3. Turn the combination lighting switch to the parking light position.

Does the ILL signal change from [0] to [1] when the combination lighting switch is changed to the parking light position?
-YES- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.
-NO- Go to step 3.

3. Multiplex integrated control system DTC check:

Multiplex integrated control system DTC check
-1. Turn the combination lighting switch to the off position.

-2. Turn the ignition switch to LOCK (0).

-3. Connect the HDS to the DLC.

-4. Turn the ignition switch to ON (II).

-5. Clear the DTCs with the HDS.

-6. Turn the ignition switch to LOCK (0) and then back to ON (II).

-7. Check for DTCs with the HDS.

Are any DTCs indicated?
-YES- Go to indicated DTC's troubleshooting.
-NO- Go to step 4.

4. Open wire check (B_CAN-H line, B_CAN-L line):

Open wire check (B_CAN-H line, B_CAN-L line)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connectors.





-3. Check for continuity between test points 1 and 2.














Is there continuity?
-YES- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.
-NO- Repair an open in the wire(s) between the audio-navigation unit and the gauge control module (tach).