Honda HR-V: Poor AM Or FM Radio Reception Or Interference (Without Navigation)
NOTE:
- Check the vehicle 12 volt battery condition first.
- Check for aftermarket accessories plugged into the vehicle accessory
power sockets.
- 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:
- The radio station is far away
- Atmospheric conditions are unfavorable
- Tall buildings, mountains, or high-voltage power lines are nearby
- Aftermarket metallic window tinting or electronic accessories
- Check the connectors for poor connections or loose terminals.
1. Problem verification:
- Turn the vehicle to the ON mode.
- Do the Seek Stop Test in the Sound Quality Diagnosis - Refer to: Audio
System Sound Quality Diagnosis, or Audio System Diagnostic Mode (Without
Navigation,
Display Audio Type (7-inch Screen) ), or Audio System Diagnostic Mode
(Without Navigation, Color Audio Type (5-inch Screen) ).
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):
- Start the engine, and turn on the electrical loads one at a time
(defrosters, blower motor, etc.).
- Check the reception/interference while the engine is running.
Is there noise (static or whine) only with the engine running?
YES
Check the antenna and radio grounds. If OK, check the charging system and the
ignition system.
NO
Go to step 3.
3. Determine possible failure area (SWD +B line, AM/FM line):
- Disconnect the following connector.
Roof antenna 3P connector
- Turn the vehicle to the ON mode, and turn on the audio system.
- Measure the voltage between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 25(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 26(21).png)
Is there battery voltage?
YES
The SWD +B wire is OK. Go to step 4.
NO
Go to step 9.
4. Open wire check (AM/FM line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Audio unit connector E (3P)
- Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 27(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 28(21).png)
Is there continuity?
YES
The AM/FM wire is not open. Go to step 5.
NO
Replace the AM/FM antenna lead and/or the sublead.
5. Shorted wire check (AM/FM line).
Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 29(21).png)
Is there continuity?
YES
Replace the AM/FM antenna lead and/or the sublead.
NO
The AM/FM wire is not shorted. Go to step 6.
6. Shorted wire check (AM/FM line to SH (AM/FM) line).
Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 30(21).png)
Is there continuity?
YES
Replace the AM/FM antenna lead and/or the sublead.
NO
The AM/FM wire is OK. Go to step 7.
7. Open wire check (SH (AM/FM) line).
Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 31(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 32(21).png)
Is there continuity?
YES
The SH (AM/FM) wire is OK. Go to step 8.
NO
Replace the AM/FM antenna lead and/or the sublead.
8. Roof antenna check (substitution):
- Substitute a known-good roof antenna.
- Reconnect all the connectors, and recheck.
Does the symptom go away?
YES
Replace the original roof antenna.
NO
Replace the audio unit - Refer to: Audio Unit Removal and Installation
(Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation
(Color Audio Type (5-inch Screen) ).
9. Open wire check (SWD +B line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Audio unit connector E (3P)
- Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 33(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 34(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 35(21).png)
Is there continuity?
YES
The SWD +B wire is not open. Go to step 10.
NO
Repair an open in the wire between the audio unit and the roof antenna.
10. Shorted wire check (SWD +B line).
Check for continuity between test points 1 and 2.
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 36(21).png)
![Audio Visual Systems - Testing & Troubleshooting](images/books/1097/index 37(21).png)
Is there continuity?
YES
Repair a short to body ground in the wire between the audio unit and the roof
antenna.
NO
Replace the audio unit - Refer to: Audio Unit Removal and Installation
(Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation
(Color Audio Type (5-inch Screen) ).
READ NEXT:
NOTE:
Check the vehicle 12 volt battery condition first.
Check the radio reception in an open area. Poor reception/interference
can be caused by tall buildings, mountains, or high-voltage power l
NOTE:
Check the vehicle 12 volt battery condition first.
You can select three different rearview camera angles for backing up. If
there is no camera image on the display, go to Audio System Sympt
NOTE:
Check the vehicle 12 volt battery condition first.
Check the connectors for poor connections or loose terminals.
1. Problem verification:
Turn the vehicle to the ON mode.
Shift the transm
SEE MORE:
MULTIPURPOSE CAMERA AIMING
Special Tools Required
Honda Diagnostic
System (HDS)
MVCI unit with
the latest control
module (CM)
update software
installed
Alignment Set
07AAJ-STKA210
Target Set
07AAK-
5K0A100
Target Adjuster
07AAK-
5K0A110
Stand Pole
(Aluminum)
07AAK-
5K0A120
Stand 07AAJTK8A100
Special Tools Required
SRS Inflator Simulator 07SAZ-TB4011A
SRS Simulator Lead J 070AZ-SNAA100
NOTE:
Before doing this troubleshooting procedure, find out if the vehicle was
in a collision. If so, verify that all the required components were replaced
with new components of the correct part