DTC B1660: Front Interior LF Antenna Circuit Open

DTC (Keyless Access Control Unit)

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   - 2. Select the MODE MENU from the HDS, then enter the SELF CHECK.

   One-Push - KEYLESS ACCESS CONTROL UNIT - SELF CHECK

   - 3. Do the SELF CHECK.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1660 FRONT INTERIOR ANTENNA CIRCUIT OPEN OR SHORT

   Is DTC B1660 indicated?

   YES 

   Go to step 2 below.

   NO 

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

2. Keyless access control unit EXT F+, EXT F- line output check

   - 1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Front interior LF antenna 2P connector - Refer to: Keyless Access LF Antenna (Front Interior) Removal and Installation

   - 3. Press the engine start/stop button to select the ON mode.

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

   One-Push - KEYLESS ACCESS CONTROL UNIT - FUNCTIONAL TESTS

   - 5. Connect the voltmeter to test points 1 and 2.

   Test point 1	Front interior LF antenna 2P connector No. 2 (GRN)
   Test point 2	Front interior LF antenna 2P connector No. 1 (BRN)

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

   - 6. Select CABIN FRONT ANTENNA with the HDS.

   Is there voltage?

   YES 

   Replace the front interior LF antenna. - Refer to: Keyless Access LF Antenna (Front Interior) Removal and Installation .

   NO 

   Go to step 3 below.

3. Open wire check (EXT F+, EXT F- lines)

   - 1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Keyless access control unit connector A (32P)

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

   Test condition	OFF mode
   	Keyless access control unit connector A (32P): disconnected
   	Front interior LF antenna 2P connector: disconnected
   Test circuit	EXT F+
   Test point 1	Keyless access control unit connector A (32P) No. 32 (GRN)
   Test point 2	Front interior LF antenna 2P connector No. 2 (GRN)

   Test circuit	EXT FR F-
   Test point 1	Keyless access control unit connector A (32P) No. 16 (BRN)
   Test point 2	Front interior LF antenna 2P connector No. 1 (BRN)

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

   Is there continuity?

   YES 

   Replace the keyless access control unit .

   NO 

   Repair an open or high resistance in the wire.