Symptom Troubleshooting - No picture is shown on the display

No picture is shown on the display


NOTE: Always check the connectors for poor connections or loose terminals.

1.Check the No. 7 (10A) fuse and No. 32 (7.5A) fuse in the under-dash fuse relay box, and reinstall the fuse if it is OK.

Is the fuse OK?


YES - Go to 2.


NO - Replace the fuse and recheck.n


2.Turn the ignition switch to ACC (I).

3.Operate the radio and listen to the audio.

Can audio be heard?


YES - Go to 4.


NO - Check the ACC circuit.n


4.Turn the ignition switch ON (II).

5.Measure the voltage between body ground and navigation unit connector B (12P) terminals No. 1 and No. 2 individually.

Is there battery voltage?


YES - Go to 6.


NO - If the +B wire does not have voltage, repair open in the wire between the under-dash 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.n


6.Turn the ignition switch OFF.

7.Disconnect the navigation unit connector B (12P).

8.Check for continuity between navigation unit connector B (12P) terminal No. 4 and body ground.

Is there continuity?


YES - Go to 9.


NO - Repair open in the wire between the navigation unit and body ground (G603).n


9.Reconnect the navigation unit connector B (12P).

10.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 with a known good unit.n

  • If the symptom is gone, replace the original unit.
  • If the display does not show any back light, substitute a known-good display unit, and recheck. If the symptom is gone, replace the original display unit.


NO - Replace the display unit, refer to audio-HVAC display module removal.n