DTC B1660

DTC B1660  : Front Interior LF Antenna circuit open

DTC (Keyless Access Control Unit)

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 Checks .

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.

   One-Push - KEYLESS ACCESS CONTROL UNIT - SELF CHECK

   Do the SELF CHECK.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1660 Front Interior LF Antenna circuit open

   Is DTC B1660 indicated?

   YES 

   Go to step 2.

   NO 

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

2. Keyless access/TPMS control unit FR INT LF+, FR INT LF- line output check

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

   -2. Disconnect the following connector.

   Front interior LF antenna 2P connector

   -3. Turn the vehicle to the ON mode.

   -4. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter FUNCTIONAL TESTS.

   One-Push - KEYLESS ACCESS CONTROL UNIT - FUNCTIONAL TESTS

   Connect the voltmeter to test points 1 and 2.

   Test condition	Vehicle ON mode Front interior LF antenna 2P connector: disconnected
   Test point 1	Front interior LF antenna 2P connector No. 2
   Test point 2	Front interior LF antenna 2P connector No. 1

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

   -6. Select CABIN FRONT ANTENNA L DC OUTPUT with the HDS.

   Is there voltage?

   YES 

   Faulty front interior LF antenna; replace the front interior LF antenna - Refer to: Keyless Access LF Antenna/Initiator (Left-Front) Removal and Installation or Keyless Access LF Antenna (Front Interior) Removal and Installation .

   NO 

   Go to step 3.

3. Open wire check (FR INT LF+, FR INT LF- lines)

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

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

   Terminal A	Front interior LF antenna 2P connector No. 2
   Terminal B	Front interior LF antenna 2P connector No. 1

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

   -3. Disconnect the following connector.

   Keyless access/TPMS control unit connector A (32P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Keyless access/TPMS control unit connector A (32P): disconnected Front interior LF antenna 2P connector: disconnected
   Test point 1	Keyless access/TPMS control unit connector A (32P) No. 14 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023) or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
   Test point 2	Keyless access/TPMS control unit connector A (32P) No. 30 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023) or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs

   Is there continuity?

   YES 

   The FR INT LF+ and FR INT LF- wires are OK. Replace the keyless access/TPMS control unit .

   NO 

   Repair an open or high resistance in the wire.