Audio-navigation unit power switch will not turn on (No information display and no sound) (with navigation)

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
Check the connectors for poor connections or loose terminals.
Eject all the audio discs before removing the audio-navigation unit to prevent damaging the CD player's load mechanism.
Remove the PC card before removing the audio-navigation unit.

Turn the ignition switch to ON (II).
Push the power button ON to see if audio-navigation unit turns ON.
Does the audio-navigation unit display operate properly, and does the audio-navigation unit sound normal?

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

NO -go to step 3.
Turn the ignition switch to LOCK (0).
Check the No. 1 (15 A) fuse the No. 14(7.5 A) fuse in the under-dash fuse/relay box.
Are the fuses OK?

YES -go to step 5.

NO -Replace the fuse(s), and recheck.
Remove the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). Check that the audio-navigation unit is properly connected.
NOTE:
- Eject all the audio discs before removing the audio-navigation unit to prevent damaging the CD player's load mechanism.
- Remove the PC card before removing the audio-navigation unit.
Is it connected properly?

YES -go to step 6.

NO -Reconnect the connector(s), and recheck the function.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 14 and No. 24 individually.

Fig 1: Measuring Voltage Between Body Ground And Audio-Navigation Unit Connector A (24P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage on the both terminals?

YES -go to step 8.

NO -Repair an open in the wire(s) between the No. 1 (15 A) fuse and the No. 14 (7.5 A) fuse in the under-dash fuse/relay box and the audio-navigation unit.
Measure the voltage between audio-navigation unit connector A (24P) terminal No. 12 and body ground.

Fig 2: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) Terminal No. 12 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V?

YES -Substitute a known-good audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit.

NO -Repair an open or high resistance in the wire between the audio-navigation unit connector A (24P) terminal No. 12 and body ground (G503) (see DASHBOARD WIRE HARNESS (VIEW OF MIDDLE SECTION) (WITH NAVIGATION) ).