Audio unit power switch will not turn on (No information display and no sound) (without 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 discs before removing the audio unit to prevent damaging the CD player's load mechanism.

Turn the ignition switch to ON (II).
Push the power button ON to see if audio unit turns ON.
Does the audio unit display operate properly, and does the audio 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 and 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 unit (see AUDIO UNIT REMOVAL/INSTALLATION ). Check that the audio unit is properly connected.
NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.

Is it connected properly?

YES -
- Except DX model: Go to step 6.
- DX model: Go to step 9.
NO -Reconnect the connector(s), and recheck the function.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and audio unit connector A (24P) terminals No. 14 and No. 24 individually.

Fig 1: Measuring Voltage Between Body Ground And Audio 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 unit.
Measure the voltage between audio unit connector A (24P) terminal No. 12 and body ground.

Fig 2: Measuring Voltage Between Audio 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 unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio unit.

NO -Repair an open or high resistance in the wire between the audio unit connector A (24P) terminal No. 12 and body ground (G503) (see DASHBOARD WIRE HARNESS (VIEW OF MIDDLE SECTION) (WITHOUT NAVIGATION) ).
Turn the ignition switch to ON (II).
Measure the voltage between body ground and audio unit connector A (17P) terminals No. 14 and No. 17 individually.

Fig 3: Measuring Voltage Between Body Ground And Audio Unit Connector A (17P) Terminals No. 14 and No. 17
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage on the both terminals?

YES -Go to step 11.

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 unit.
Measure the voltage between audio unit connector A (17P) terminal No. 9 and body ground.

Fig 4: Measuring Voltage Between Audio Unit Connector A (17P) Terminal No. 9 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V?

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

NO -Repair an open or high resistance in the wire between audio unit connector A (17P) terminal No. 9 and body ground (G503).