DTC B1640: RF Unit Not Connected

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .

• 1. Problem verification:

  1. Clear the DTCs with the HDS.

  2. Push the door outer handle door lock button to lock the door.

  3. Touch the door outer handle touch sensor to unlock the door.

  4. Check for DTCs with the HDS.

  DTC Description	DTC
  B1640 RF1 antenna not connected or malfunction

  Is DTC B1640 indicated?

  YES 

  Replace the keyless access control unit .

  NO 

  Intermittent failure, the system is OK at this time. Check for loose or poor connections.