Fig. 154: Checking For Continuity Between Test Point Right Tweeter 2P Connector No. 1
(GRN) And No. 2 (RED)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : REPLACE THE AUDIO UNIT .
NO : Repair an open in the wire(s) between the audio unit and the tweeter.
POOR AM OR FM RADIO RECEPTION OR INTERFERENCE (WITH NAVIGATION)
Fig. 155: Audio System Symptom Troubleshooting Flowchart - Poor AM Or FM Radio Reception Or
Interference (1 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 156: Audio System Symptom Troubleshooting Flowchart - Poor AM Or FM Radio Reception Or
Interference (2 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
ο¬
ο¬
CHECK THE VEHICLE BATTERY CONDITION FIRST .
Check for aftermarket accessories plugged into the vehicle accessory
power sockets.
ο¬
Check for any radio frequency modulators that are plugged into the FM
antenna lead. These modulators allow customers to play audio from
accessories like CD players or game consoles using the audio system, but
they can create interference issues.
ο¬
Check the radio reception in an open area. Compare it to a known-good
vehicle whenever possible. Poor reception/interference can be caused by
the following:
ο‘
ο‘
ο‘
ο‘
The radio station is far away
Atmospheric conditions are unfavorable
Tall buildings, mountains, or high-voltage power lines are nearby
Electrical loads like the rear window defroster, seat heaters, game
consoles, etc.
ο¬
Check the connectors for poor connections or loose terminals.
1. Problem verification:
ο‘
1. Turn the ignition switch to ON (II).
2. DO THE SEEK STOP TEST IN THE SOUND QUALITY DIAGNOSIS .
ο‘
Is the test vehicle within 10 % of the known-good vehicle?
YES : Multipath interference or weak station. Operation is normal.
NO : The failure is duplicated, go to step 2.
2. Determine possible failure area (charging system and ignition system, others):
ο‘
ο‘
1. Start the engine, and turn on the electrical loads one at a time (defrosters, seat heaters, blower
motor, etc.).
2. Check the reception/interference while the engine is running.
Is there noise (static or whine) only with the engine running?
YES : Check the antenna, the antenna mounting nut, and radio grounds. If OK, check the charging system
and the ignition system.
NO : Go to step 3.
3. Determine possible failure area (AM/FM antenna mast, others):
ο‘
1. Turn the ignition switch to LOCK (0).
ο‘
2. Check the AM/FM antenna mast for cracks or other damage. Verify that the AM/FM antenna
mast is not loose.
NOTE:
Is there any damage?
Do not use any tools to tighten the AM/FM antenna mast.
YES : Replace the AM/FM antenna mast.
NO : Go to step 4.
4. Determine possible failure area (SWD +B line, AM/FM line):
ο‘
1. Disconnect the following connector.
AM/FM antenna 3P connector
ο‘
ο‘
ο‘
2. Turn the ignition switch to ON (II).
3. Turn on the audio system, and select AM or FM.
4. Measure the voltage between test points 1 and 2.
Test condition IG ON (II)
AM/FM antenna 3P connector: disconnected
Test circuit SWD +B
Test point 1 AM/FM antenna 3P connector No. 1
Test point 2 Body ground
Fig. 157: Measuring Voltage Between Test point AM/FM antenna 3P connector No. 1 and
Body ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES : Go to step 5.
NO : Go to step 14.
5. Open wire check (AM/FM line):
ο‘
1. Turn the ignition switch to LOCK (0).
ο‘
2. Disconnect the following connector.
Audio-navigation unit connector D (3P)
3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
ο‘
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit AM/FM
Test point 1 Audio-navigation unit connector D (3P) No. 2
Test point 2 AM/FM antenna 3P connector No. 2
Fig. 158: Checking For Continuity Between Test Point Audio-Navigation Unit Connector D
(3P) No. 2 And AM/FM Antenna 3P Connector No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The AM/FM wire is not open. Go to step 7.
NO : Go to step 6.
6. FM distributor check:
1. Disconnect the following connector.
FM distributor 3P connector
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit AM/FM
Test point 1 FM distributor 3P connector No. 2
Test point 2 AM/FM antenna 3P connector No. 2
Fig. 159: Checking For Continuity Between Test Point FM Distributor 3P Connector No. 2
And AM/FM Antenna 3P Connector No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : REPLACE THE FM DISTRIBUTOR .
NO : Replace the AM/FM antenna lead and/or the sublead.
7. Shorted wire check (AM/FM line):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit AM/FM
Test point 1 Audio-navigation unit connector D (3P) No. 2
Test point 2 Body ground
Fig. 160: Checking For Continuity Between Audio-Navigation Unit Connector D (3P) No. 2
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Go to step 8.
NO : The AM/FM wire is not shorted to ground. Go to step 9.
8. FM distributor check:
ο‘
ο‘
1. Disconnect the following connector.
FM distributor 3P connector
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit AM/FM
Test point 1 FM distributor 3P connector No. 2
Test point 2 Body ground
Fig. 161: Checking For Continuity Between FM Distributor 3P Connector No. 2 And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Replace the AM/FM antenna lead and/or the sublead.
NO : REPLACE THE FM DISTRIBUTOR .
9. Open wire check (SH (AM/FM) line):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit SH (AM/FM)
Test point 1 Audio-navigation unit connector D (3P) No. 3
Test point 2 AM/FM antenna 3P connector No. 3
Fig. 162: Checking For Continuity Between Test Point Audio-Navigation Unit Connector D
(3P) No. 3 And AM/FM Antenna 3P Connector No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The SH (AM/FM) wire is not open. Go to step 11.
NO : Go to step 10.
10. FM distributor check:
ο‘
1. Disconnect the following connector.
FM distributor 3P connector
ο‘
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit SH (AM/FM)
Test point 1 FM distributor 3P connector No. 3
Test point 2 AM/FM antenna 3P connector No. 3
Fig. 163: Checking For Continuity Between Test Point FM Distributor 3P Connector No. 3
And AM/FM Antenna 3P Connector No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : REPLACE THE FM DISTRIBUTOR .
NO : Replace the AM/FM antenna lead and/or the sublead.
11. Shorted wire check (AM/FM line to SH (AM/FM) line):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit AM/FM, SH (AM/FM)
Test point 1 Audio-navigation unit connector D (3P) No. 2
Test point 2 Audio-navigation unit connector D (3P) No. 3
Fig. 164: Checking For Continuity Between Test Point Audio-Navigation Unit Connector D
(3P) No. 2 And No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Go to step 13.
NO : Go to step 12.
12. Audio-navigation unit check:
ο‘
1. SUBSTITUTE A KNOWN-GOOD AM/FM ANTENNA , and recheck.
Does the symptom go away?
YES : Replace the original AM/FM antenna.
NO : REPLACE THE AUDIO-NAVIGATION UNIT .
13. FM distributor check:
ο‘
1. Disconnect the following connector.
FM distributor 3P connector
ο‘
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit AM/FM, SH (AM/FM)
Test point 1 FM distributor 3P connector No. 2
Test point 2 FM distributor 3P connector No. 3
Fig. 165: Checking For Continuity Between Test Point FM Distributor 3P Connector No. 2
And No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Replace the AM/FM antenna lead and/or the sublead.
NO : REPLACE THE FM DISTRIBUTOR .
14. Open wire check (SWD +B line):
ο‘
1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connector.
ο‘
Audio-navigation unit connector D (3P)
3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
ο‘
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit SWD +B
Test point 1 Audio-navigation unit connector D (3P) No. 1
Test point 2 AM/FM antenna 3P connector No. 1
Fig. 166: Checking For Continuity Between Test Point Audio-Navigation Unit Connector D
(3P) No. 1 And AM/FM Antenna 3P Connector No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The SWD +B wire is not open. Go to step 16.
NO : Go to step 15.
15. FM distributor check:
ο‘
1. Disconnect the following connector.
FM distributor 3P connector
ο‘
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit SWD +B
Test point 1 FM distributor 3P connector No. 1
Test point 2 AM/FM antenna 3P connector No. 1
Fig. 167: Checking For Continuity Between Test Point FM Distributor 3P Connector No. 1
And AM/FM Antenna 3P Connector No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : REPLACE THE FM DISTRIBUTOR .
NO : Replace the AM/FM antenna lead and/or the sublead.
16. Shorted wire check (SWD +B line):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
Test circuit SWD +B
Test point 1 Audio-navigation unit connector D (3P) No. 1
Test point 2 Body ground
Fig. 168: Checking For Continuity Between Test Point Audio-Navigation Unit Connector D
(3P) No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there about 7 m ohms resistance?
YES : Go to step 17.
NO : REPLACE THE AUDIO-NAVIGATION UNIT .
17. FM distributor check:
ο‘
ο‘
1. Disconnect the following connector.
FM distributor 3P connector
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
AM/FM antenna 3P connector: disconnected
Audio-navigation unit connector D (3P): disconnected
FM distributor 3P connector: disconnected
Test circuit SWD +B
Test point 1 FM distributor 3P connector No. 1
Test point 2 Body ground
Fig. 169: Checking For Continuity Between Test Point FM Distributor 3P Connector No. 1
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Replace the AM/FM antenna lead and/or the sublead.
NO : REPLACE THE FM DISTRIBUTOR .
POOR AM OR FM RADIO RECEPTION OR INTERFERENCE (WITHOUT NAVIGATION)
Fig. 170: Audio System Symptom Troubleshooting Flowchart - Poor AM Or FM Radio Reception Or
Interference
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
ο¬
ο¬
CHECK THE VEHICLE BATTERY CONDITION FIRST .
Check for aftermarket accessories plugged into the vehicle accessory
power sockets.
ο¬
Check for any radio frequency modulators that are plugged into the FM
antenna lead. These modulators allow customers to play audio from
accessories like CD players or game consoles using the audio system, but
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