DTC Troubleshooting: B1659

DTC B1659: Front interior LF antenna circuit short

DTC Description	DTC
B1659 Front interior LF antenna circuit short

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

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTCs with the HDS.

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

?4.	Do the SELF CHECK.

?5.

Check for DTCs with the HDS.

DTC Description	DTC
B1659 Front interior LF antenna circuit short

Is DTC B1659 indicated?


	YES

Go to step 2.


	NO

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

Shorted wire check (EXT F+, EXT F- lines):

Shorted wire check (EXT F+, EXT F- lines)

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

?2.

Disconnect the following connectors.

Keyless access control unit connector A (32P)
Front interior LF antenna 2P connector

?3.

Check for continuity between test points 1 and 2 individually.

Test condition	Vehicle OFF (LOCK) mode Keyless access control unit connector A (32P): disconnected Front interior LF antenna 2P connector: disconnected
Test point 1	Keyless access control unit connector A (32P) No. 14
Test point 2	Body ground

Test point 1	Keyless access control unit connector A (32P) No. 30
Test point 2	Body ground

Is there continuity?


	YES

Repair a short to ground in the wire.?


	NO

The EXT F+ and EXT F- wires are not shorted. Go to step 3.

Shorted wire check (EXT F+ line to EXT F- line):

Shorted wire check (EXT F+ line to EXT F- line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode Keyless access control unit connector A (32P): disconnected Front interior LF antenna 2P connector: disconnected
Test point 1	Keyless access control unit connector A (32P) No. 14
Test point 2	Keyless access control unit connector A (32P) No. 30

Is there continuity?


	YES

Repair a short in EXT F+ wire to EXT F- wire.?


	NO

The EXT F+ and EXT F- wires are OK. Go to step 4.

EXT F+, EXT F- line output check:

EXT F+, EXT F- line output check

?1.

Reconnect the following connector.

Keyless access control unit connector A (32P)

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between 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. 1
Test point 2	Front interior LF antenna 2P connector No. 2

Is there voltage?


	YES

Replace the front interior LF antenna.?


	NO

Replace the keyless access control unit.?