Symptom Troubleshooting

HandsFreeLink System Symptom Troubleshooting - The communication with cell phone is interrupted or changes

The communication with cell phone is interrupted or changes (with navigation)

NOTE:

- Before doing this troubleshooting, refer to General Troubleshooting Information Initial Inspection and Diagnostic Overview to make sure the phone is compatible and configured correctly. You can also check online at www.acura.com/handsfreelink, or call the HFL support desk at 888-528-7876.
- The connected device may not function properly when it is in the trunk or in a metallic case.

1. Turn the ignition switch to ON (II).

2. Check that the audio system is operating normally from different audio sources (AM, FM, XM, CD, Navigation, etc.). Also make sure the front speakers operate normally.

Does the audio system work normally and is the audio output from the speakers normal when playing various audio sources?

YES -

Go to step 3.

NO -

Do the audio system troubleshooting.�

3. Duplicate the symptom with the Bluetooth phone.

Does the symptom occur in a specific place or under a specific condition?

YES -

Operation is normal: Bluetooth audio is OK at this time. Influence or electric wave interference.�

NO -

Go to step 4.

4. If you have the client's phone, go to step 5. Otherwise, pair a known-good cell phone to the client's vehicle.

Can you pair the Bluetooth phone, and does it operate normally?

YES -

The client's Bluetooth phone is defective or not compatible.�

NO -

Go to step 6.

5. Pair the client's phone to a known-good vehicle.

Can you pair the Bluetooth phone, and does it operate normally?

YES -

Go to step 6.

NO -

The client's Bluetooth phone is defective or not compatible.�

6. Check the connections at the HandsFreeLink control unit 28P connector terminals.

Are the connections and terminals connected properly?

YES -

Go to step 7.

NO -

Repair the connection, and recheck.�

7. Turn the ignition switch to LOCK (0).

8. Disconnect the HandsFreeLink control unit 28P connector, and audio-navigation unit connector D (14P).

9. Check for continuity between body ground and the HandsFreeLink control unit 28P connector according to the table.









Is there continuity?

YES -

There is a short to body ground in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.�

NO -

Go to step 10.

10. Check for continuity between audio-navigation unit connector C (14P) and the HandsFreeLink control unit 28P connector according to the table.









Is there continuity?

YES -

Go to step 11.

NO -

There is an open in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.�

11. Check for continuity between the terminals of the HandsFreeLink control unit 28P connector according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.�

NO -

Substitute a known-good HandsFreeLink control unit Service and Repair, and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit Service and Repair.�