B1792

DTC Troubleshooting: B1792

DTC B1792:

HandsFreeLink control module error

NOTE: Check the vehicle battery condition first Testing and Inspection.

1. Connect the HDS to the DLC.

2. Clear the DTCs with the HDS.

3. Turn the ignition switch to LOCK (0), and then back to ON (II).

4. Check for DTCs with the HDS.

Is DTC B1792 indicated?

YES -

Go to step 5.

NO -

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

5. Measure the voltage between body ground and HandsFreeLink control unit 28P connector terminals No. 15 and No. 16 individually.





Is there battery voltage?

YES -

Go to step 6.

NO -

If the +B wire does not have voltage, repair an open in the wire between the No. 23 (10 A) fuse in the under-hood fuse/relay box and the HandsFreeLink control unit. If the ACC wire does not have voltage, repair an open in the wire between the No. 35 (10 A) fuse in the under-dash fuse/ relay box and the HandsFreeLink control unit.�

6. Measure the voltage between HandsFreeLink control unit 28P connector terminal No. 1 and body ground.





Is there less than 0.2 V?

YES -

Replace the HandsFreeLink control unit Service and Repair.�

NO -

Repair an open or high resistance in the wire between the HandsFreeLink control unit and body ground (G403).�