Poor RDS-TMC Reception Or Interference

Navigation System Symptom Troubleshooting - Poor RDS-TMC reception or interference

Poor RDS-TMC reception or interference

NOTE:
* Check the vehicle battery condition first Battery Test.
* Check for aftermarket accessories including cell phones and chargers plugged into the vehicle accessory power sockets.
* Check the RDS-TMC reception in an open area. Poor reception/interference can be caused by the following;
- The RDS-TMC station is too far away
- Atmospheric condition are unfavorable
- Tall buildings, mountains, or high-voltage power lines are nearby
- Aftermarket metallic window tinting

* Check any official Honda service website for more service information about the navigation system.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Check if the TMC information is displayed on the navigation map screen.

Is the TMC information displayed?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 2.

2. Determine possible failure area (multipath interference, others):

Determine possible failure area (multipath interference, others)
-1. Check if the RDS-TMC reception/interference is the same as the known-good vehicle in several locations.

Is the reception/interference the same?
-YES- Multipath interference or weak station. Operation is normal.
-NO- Go to step 3.

3. Determine possible failure area (charging system, others):

Determine possible failure area (charging system, others)
-1. Start the engine.

-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 and radio grounds. If OK, check the charging system and the ignition system.
-NO- Go to step 4.

4. Determine possible failure area (window antenna, others):

Determine possible failure area (window antenna, others)
-1. Turn the ignition switch to LOCK (0).

-2. Remove the left quarter pillar trim.

-3. With the help of an assistant inside the vehicle, have the assistant shine a strong flashlight (A) along each antenna wire (B). Check from the outside of the vehicle for any breaks or openings in the antenna wires (the light shines through any breaks or cuts).
NOTE: It is easier to see the breaks if you do this test in a dark or shaded area.





Are there any breaks or cuts in the antenna?
-YES- Repair the window antenna Procedures, or replace the rear window Rear Window Removal and Installation (2-door) if the damaged section is too long.
-NO- Go to step 5.

5. Audio-navigation unit check:

Audio-navigation unit check
-1. Substitute a known-good RDS-TMC antenna lead and sublead, and recheck.

Does the symptom go away?
-YES- Replace the original RDS-TMC antenna lead and sublead.
-NO- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.