Power Switch Will Not Turn ON (No Information Display and No Sound) (With Navigation)

Power switch will not turn ON (No information display and no sound) (with navigation)

1. With the ignition switch ON (II), push the power switch ON to see if the navigation unit turns ON.

Does the navigation unit display operate properly, and does the audio sound normal?

YES - Intermittent failure, the system is OK at this time.

NO - Go to step 2.

2. Turn the ignition switch OFF.

3. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 35 (7.5 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 4.

NO - Replace the fuse(s), and recheck.

4. Remove the navigation unit. Check that the navigation unit is properly connected.

Is it connected properly?

YES - Go to step 5.

NO - Reconnect the connector, and recheck the function.

5. Disconnect the navigation unit connector A (17P).
6. Turn the ignition switch ON (II).




7. Measure the voltage between navigation unit connector A (17P) terminal No. 14 and body ground, and between terminal No. 17 and body ground.

Is there battery voltage on both terminals?

YES - Go to step 8.

NO - Repair open in the wire(s) between the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 35 (7.5 A) in the under-dash fuse/relay box and the audio unit.

8. Reconnect navigation unit connector A (17P).




9. Measure the voltage between navigation unit connector A (17P) No.9 terminal and body ground, and navigation unit connector B (22P) No. 15 terminal and body ground.

Is there less than 0.1 V on both terminals?

YES - Replace the navigation unit.

NO - Repair open in the wire between navigation unit connector A (17P) No. 19 terminal or navigation unit connector B (22P) No. 15 terminal and body ground (G505).