No Picture Is Displayed
No picture is displayedNOTE: Always check the connectors for poor connections or loose terminals.
1. Check the No. 7 (7.5 A) fuse and No. 32 (10 A) fuse in the driver's under-dash fuse/relay box, and reinstall the fuse if it is OK.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse and recheck.
2. Turn the ignition switch to ACC (I).
3. Operate the radio and listen to the audio.
Can you hear the audio?
YES - Go to step 4.
NO - Check the ACC circuit.
4. Turn the ignition switch ON (II).
5. Measure the voltage between body ground and navigation unit connector C (8P) terminals No. 1 and No. 2 individually.
Is there battery voltage?
YES - Go to step 6.
NO - If the +B or ACC wire does not have voltage, repair open in the wire between the driver's under-dash fuse/relay box and the navigation unit.
6. Turn the ignition switch OFF.
7. Disconnect the navigation unit connector C (8P).
8. Check for continuity between navigation unit connector C (8P) terminal No. 4 and body ground.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the navigation unit and body ground (G504).
9. Reconnect the navigation unit connector C (8P).
10. Perform the forced starting of the display. Component Tests and General Diagnostics
Is the diagnosis menu of the picture diagnosis displayed?
YES - Go into the Diagnostic mode and use the "Navi System Link" diagnostic to check the links.
NO - Go to step 11.
11. Shield the navigation display from the sun with your hand, and check that the display is back lit (only backlight is ON).
Can you see the back light?
YES - Replace the navigation unit.
NO - Go to step 12.
12. Turn the ignition switch ON (II).
13. Measure the voltage between body ground and navigation display connector A (20P) terminal No. 1 and No. 2 individually.
Is there battery voltage?
YES - Replace the navigation display.
NO - If the +B or ACC wire does not have voltage, repair open in the wire between the driver's under-dash fuse/relay box and the navigation unit.