Symptom Troubleshooting

Symptom Troubleshooting: Communication with the connected device is interrupted or it changes

Communication with connected device is interrupted or it changes

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

- Check if the audio system functions normally.

- Do not put the Bluetooth phone in the trunk or in a metal briefcase as it may not function properly.

1. Turn on the audio unit, and check for sound in each mode (AM, FM, XM, and CD).

Does the symptom occur?
YES - Substitute a known-good audio unit, Audio Unit Removal/Installation and recheck. If the symptom/indication goes away, replace the original audio unit. Audio Unit Removal/Installation

NO - Go to step 2.


2. Duplicate the symptom with the Bluetooth phone.

Does the symptom occur in a specific place or under an specific condition?
YES - Operation is normal: Bluetooth audio is OK at this time. Influence or electric wave interference.

NO - Go to step 3.


3. Check the Bluetooth phone by either pairing the client's phone in a known-good vehicle, or pair a known-good phone to the client's vehicle.

Can you pair the Bluetooth phone?
YES - Go to step 4.

NO - Defective Bluetooth phone.


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

Are the connections and terminals connected properly?
YES - Go to step 5.

NO - Repair the connection, and recheck.


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

6. Disconnect the HandsFreeLink control unit 28P connector and audio unit connector C (14P).

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





Is there continuity?
YES - Repair short in the wire(s) between the HandsFreeLink control unit 28P connector and body ground.

NO - Go to step 8.






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





Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire between the audio unit and the HandsFreeLink control unit.






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





Is there continuity?
YES - There is a short in the wire(s) between the audio unit and the HandsFreeLink control unit. Replace the affected shield 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