USA Models

Navigation System DTC Troubleshooting: 2705

DTC 2705:

HFL Diag

USA Models

NOTE:

- Check the vehicle battery condition first Battery Test.
- This navigation DTC sets when a problem is detected in the COMM BUS (open or short) or in the HandsFreeLink control unit.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information How To Troubleshoot The Navigation System.

1. Clear the hard error code.

2. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then back to ON (II), or press the engine start/stop button to select the ON mode.

3. Go into the System Diagnostic Mode, and select the Self-Diagnosis Mode.

4. Select the XM (HIP), then check the XM (HIP) System Link.

Are the XM (HIP). ECU and Navi icons red?

YES -

Do the DTC 2704 troubleshooting 2704.�

NO -

Go to step 5.

5. Check the XM (HIP) System Link.

Is the HFL icon red?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time.�

6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Connect the HDS to the DLC.

8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

9. Check for DTCs with the HDS.

Are any HFL DTCs indicated?

YES -

Do the HFL DTC troubleshooting.�

NO -

Go to step 10.

10. Do the B-CAN Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A, and check the communication with the HandsFreeLink control unit.

Does the HandsFreeLink control unit communicate with the HDS?

YES -

Go to step 11.

NO -

Go to HandsFreeLink control unit troubleshooting.�

11. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

12. Disconnect the HandsFreeLink control unit 28P connector and AcuraLink control unit (XM receiver) connector A (32P).

13. 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 AcuraLink control unit (XM receiver) and the HandsFreeLink control unit. Replace the affected shielded harness.�

NO -

Go to step 14.

14. 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 HandsFreeLink control unit and the AcuraLink control unit (XM receiver). Replace the affected shielded harness.�

NO -

Go to step 15.

15. Check for continuity between the HandsFreeLink control unit 28P connector and AcuraLink control unit (XM receiver) connector A (32P) according to the table.













Is there continuity?

YES -

Replace the HandsFreeLink control unit Service and Repair.�

NO -

There is an open in the wire(s) between the AcuraLink control unit (XM receiver) and the HandsFreeLink control unit. Replace the affected shielded harness.�