DTC B1779: HFT Switch or HFL-Voice Control Switch (HFT TALK/HFT BACK Buttons) Circuit Open/Short NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A. Clear the DTCs with the HDS. Turn the ignition switch OFF, then start the vehicle and turn the steering wheel back and forth several times. Check for DTCs with the HDS. Is DTC B1779 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, the system is OK at this time.■
Turn the ignition switch OFF. Do the HFT-voice control switch test. Is the switch OK?
YES | - | Go to Step 6 .
NO | - | Replace the HFT-voice control switch. ■
Remove the glove box. Disconnect the 22P connector from the hands free telephone control unit. Disconnect the 6P connector from the HFT-voice control switch. Turn the ignition switch ON (II). Check for voltage on HFT-voice control switch connector terminal 5. Is there voltage?
YES | - | Repair short to power on PUR wire.
NO | - | Go to Step 11 .
Check for continuity between the hands free telephone control unit 22P connector terminal No. 2 and HFT-voice control switch 5P connector terminal No. 5. Is there continuity?
YES | - | Go to Step 12 .
NO | - | Repair an open in the RED/BLK wire between the switch, cable reel, and hands free telephone control unit.■