YES : Repair a short to power in the wire between the No. B19 (7.5 A) fuse in the under-dash fuse/relay
box and the audio unit.
NO : REPLACE THE AUDIO UNIT .
4. Audio unit check:
ο‘
1. SUBSTITUTE A KNOWN-GOOD AUDIO SWITCH PANEL , and recheck.
Does the symptom go away?
YES : Replace the original audio switch panel.
NO : REPLACE THE AUDIO UNIT .
AUDIO UNIT POWER SWITCH WILL NOT TURN ON (NO INFORMATION DISPLAY AND NO
SOUND)
Fig. 82: Audio System Symptom Troubleshooting Flowchart - Audio Unit Power Switch Will Not Turn
On (No Information Display And No Sound)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
ο¬
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CHECK THE VEHICLE BATTERY CONDITION FIRST .
Check the connectors for poor connections or loose terminals.
1. Problem verification:
ο‘
1. Turn the ignition switch to ON (II).
2. Press the POWER button on to see if the audio unit turns on.
ο‘
Does the audio system operate properly, and does the audio sound normal?
YES : Intermittent failure, the system is OK at this time.
NO : The failure is duplicated, go to step 2.
2. Fuse check:
ο‘
1. Turn the ignition switch to LOCK (0).
2. Check the following fuses.
ο‘
Fuse No. B19 (7.5 A)
Location Under-dash fuse/relay box
Fuse No. B25 (10 A)
Location Under-dash fuse/relay box
Are the fuses OK?
YES : Go to step 3.
NO : Replace the fuse(s), and recheck. If the fuse(s) blows again, check for a short in the No. B19 (7.5 A)
fuse and/or the No. B25 (10 A) fuse circuit(s).
3. Open wire check (+B AUDIO line, ACC line):
ο‘
1. Turn the ignition switch to ON (II).
ο‘
2. Measure the voltage between test points 1 and 2.
Test condition IG ON (II)
Test circuit +B AUDIO
Test point 1 Audio unit connector A (24P) No. 3 (RED)
Test point 2 Body ground
Test circuit ACC
Test point 1 Audio unit connector A (24P) No. 24 (PUR)
Test point 2 Body ground
Fig. 83: Measuring Voltage Between Test Point Audio Unit Connector A (24P) No. 24 (PUR)
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES : The +B AUDIO and the ACC wires are OK. Go to step 4.
NO : Repair an open or high resistance in the wire(s) between the No. B19 (7.5 A) fuse in the under-dash
fuse/relay box and/or the No. B25 (10 A) fuse in the under-dash fuse/relay box and the audio unit.
4. Open wire check (GND line):
ο‘
1. Measure the voltage between test points 1 and 2.
Test condition IG ON (II)
Test circuit GND
Test point 1 Audio unit connector A (24P) No. 1 (BLK)
Test point 2 Body ground
Fig. 84: Measuring Voltage Between Test Point Audio Unit Connector A (24P) No. 1 (BLK)
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?
YES : The GND wire is OK. Go to step 5.
NO : Repair an open or high resistance in the wire between the audio unit and body ground (G503).
5. Audio unit check:
ο‘
ο‘
1. Turn the ignition switch to LOCK (0).
2. SUBSTITUTE A KNOWN-GOOD AUDIO SWITCH PANEL , and recheck.
Does the symptom go away?
YES : Replace the original audio switch panel.
NO : REPLACE THE AUDIO UNIT .
AUDIO-NAVIGATION UNIT BUTTON ILLUMINATION DOES NOT WORK
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