No Picture is Displayed
No picture is displayedDiagnostic Test: Self-Diagnosis Mode
Diagnostic Test: Self-Diagnosis Mode:
1. Check the No. 15 (10 A) fuse in the under-hood fuse/relay box and No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box, and reinstall the fuses if they are OK.
Are the fuses OK?
YES - Go to step 2.
NO - Replace the fuse and recheck.
2. Turn the ignition switch to ACCESSORY (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 or refer to the audio system troubleshooting. Index, Symptom Troubleshooting
4. Turn the ignition switch to ON (II).
5. Measure the voltage between body ground and navigation unit connector A (8P) terminals No. 1 and No. 2 individually.
Is there battery voltage?
YES - Go to step 6.
NO - If the +B wire does not have voltage, repair an open in the wire between the under-hood fuse relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit.
6. Turn the ignition switch to LOCK (0).
7. Disconnect navigation unit connector A (8P).
8. Check for continuity between navigation unit connector A (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 (G651).
9. Reconnect navigation unit connector A (8P).
10. Do the forced starting of the display.
Is the diagnosis menu of the picture diagnosis displayed?
YES - Go into Self-Diagnosis mode to check the links.
NO - Go to step 11.
11. Shield the display unit from the sun with your hand, and check that the display is back lit (only back light is ON.)
Can you see the back light?
YES - Replace the navigation unit and retest. If the problem is still present, replace the navigation display unit.
NO - Go to step 12.
12. Turn the ignition switch to ON (II).
13. Measure the voltage between body ground and navigation display unit 28P connector terminals No. 1 and No. 2 individually.
Is there battery voltage?
YES - Go to step 14.
NO - If the +B wire does not have voltage, repair open in the wire between the under-hood fuse/relay box and the navigation display unit 28P connector. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation display unit 28P connector.
14. Measure the voltage between the navigation display unit 28P connector terminal No. 10 and body ground.
Is there less than 0.2 V?
YES - Replace the navigation display unit.
NO - Repair open or poor connections between the navigation display and body ground (G401).