Audio unit power switch will not turn on (No information display and no sound) (without navigation)
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- Check the connectors for poor connections or loose terminals.
- Turn the ignition switch to ON (II).
- Press the power button on to see if the audio unit turns on.
Does the audio unit display and 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. B1 (15 A) fuse and the No. B14 (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 -Go to step 6.
NO -Repair poor connections and 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. 3 and No. 24 individually.Fig 1: Measuring Voltage Between Body Ground And Audio Unit Connector A (24P) Terminals No. 3 And 24
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. B1 (15 A) fuse and/or the No. B14(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. 1 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 (see AUDIO UNIT REMOVAL/INSTALLATION ).
NO -Repair an open or high resistance in the wire between the audio unit connector A (24P) terminal No. 1 and body ground (G503) (see DASHBOARD WIRE HARNESS (VIEW OF MIDDLE SECTION) (BD) ).