Monitor Check: HFL
This diagnosis checks first whether the HandsFreeLink control unit is connected to the audio-navigation unit via the GA-Net. If the HFL and GA-NET shows NG, go to HandsFreeLink control unit Input Test (see CONTROL UNIT INPUT TEST/REPLACEMENT ). Then checking the HandsFreeLink control unit status. If the HFL shows B1792, go to HFL DTC B1792 troubleshooting (see DTC B1792: HANDSFREELINK CONTROL UNIT MODULE ERROR (WITH NAVIGATION) ).