DTC B1648

DTC B1648  : Passenger's Door LF Antenna Circuit Open

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

DTC (Keyless Access Control Unit)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Select the KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter the SELF CHECK.

   -3. Do the SELF CHECK.

   SELF CHECK

   Check for DTCs with the HDS.

   DTC Description	DTC
   B1648 Passenger's door LF antenna circuit open

   Is DTC B1648 indicated?

   YES 

   Go to step 2.

   NO 

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

2. Open wire check (EXT FR AS+, EXT FR AS- lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Body control module connector C (66P)

   Front passenger's door outer handle 8P connector

   -3. Check for continuity between test points 1 and 2 individually.

   Test condition	Vehicle OFF (LOCK) mode
   	Body control module connector C (66P): disconnected
   	Front passenger's door outer handle 8P connector: disconnected
   Test point 1	Body control module connector C (66P) No. 49
   Test point 2	Front passenger's door outer handle 8P connector (female terminals) No. 2:

   Test point 1	Body control module connector C (66P) No. 65
   Test point 2	Front passenger's door outer handle 8P connector (female terminals) No. 6:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The EXT FR AS+ and EXT FR AS- wires are OK. Go to step 3.

   NO 

   Repair an open or high resistance in the wire.

3. DTC check

   -1. Reconnect the following connector.

   Body control module connector C (66P)

   -2. Connect terminals A and B with a jumper wire.

   Terminal A	Front passenger's door outer handle 8P connector (female terminals) No. 2:
   Terminal B	Front passenger's door outer handle 8P connector (female terminals) No. 6:

   Courtesy of HONDA, U.S.A., INC.

   -3. Remove all the keyless remotes from inside the vehicle.

   -4. Press the engine start/stop switch button at 5 times.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   B1647 Passenger's Door LF Antenna Circuit Short

   Is DTC B1647 indicated?

   YES 

   Faulty LF antenna; replace the front passenger's door outer handle .

   NO 

   Replace the body control module .