DTC B1668

DTC B1668  : Rear Shelf 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
   B1668 Rear shelf LF antenna circuit open

   Is DTC B1668 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 M+, EXT M- lines)

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

   -2. Disconnect the following connector.

   Body control module connector C (66P)

   Rear shelf LF antenna 2P 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
   	Rear shelf LF antenna 2P connector: disconnected
   Test point 1	Body control module connector C (66P) No. 34
   Test point 2	Rear shelf LF antenna 2P connector (female terminals) No. 1:

   Test point 1	Body control module connector C (66P) No. 18
   Test point 2	Rear shelf LF antenna 2P connector (female terminals) No. 2:

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

   Is there continuity?

   YES 

   The EXT M+ and EXT M- 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	Rear shelf LF antenna 2P connector (female terminals) No. 1:
   Terminal B	Rear shelf LF antenna 2P connector (female terminals) No. 2:

   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
   B1667 Rear Shelf LF Antenna Circuit Short

   Is DTC B1667 indicated?

   YES 

   Replace the rear shelf LF antenna .

   NO 

   Replace the body control module .