Navigation System Symptom Troubleshooting - Picture has lines, rolls, or is blurry

Picture has lines, rolls, or is blurry

NOTE:

	Check the vehicle battery condition first.
	Always compare the screen image to a known-good vehicle. If the screen looks the same, inform the customer that it is a characteristic of the system.
	Check the navigation screen settings for brightness, contrast, black level, and check the color screen for map color and menu color.
	Check the connectors for poor connections or loose terminals.

Determine possible failure area (accessories, others):

Determine possible failure area (accessories, others)

?1.	Check for any electronic aftermarket accessories (possibly hidden) mounted near the audio-navigation unit.

Are there any electronic accessories?

Remove the accessories, and recheck.?

Go to step 2.

Problem verification:

Problem verification

?1.	Start the engine.

?2.	Check the navigation screen.

Is the picture scrolling horizontally (left to right or right to left), have lines across the screen, or is blurry?

The failure is duplicated, go to step 3.

Intermittent failure, the system is OK at this time.?

Determine possible failure area (charging system and ignition system, others):

Determine possible failure area (charging system and ignition system, others)

?1.	Press the engine start/stop button to select the OFF mode and then select the ON mode, and observe the navigation picture.

Did the image improve?

Check for sources of electrical noise, such as charging system or ignition system.?

Go to step 4.

Multi-information display unit check (substitution):

Multi-information display unit check (substitution)

?1.	Substitute a known-good multi-information display unit, and recheck.

Does the symptom go away?

Replace the original multi-information display unit.?