DTC B1663: Rear Interior LF Antenna Circuit Short
| DTC Description | DTC |
|---|---|
| B1663 Rear 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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
- 1. Problem verification:
1. Select the KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter the SELF CHECK.
2. Do the SELF CHECK.
3. Check for DTCs with the HDS.
DTC Description DTC B1663 Rear interior LF antenna circuit short Is DTC B1663 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- 2. Shorted wire check (EXT R+, EXT R- lines):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Keyless access control unit connector A (32P) Rear 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
Rear interior LF antenna 2P connector: disconnected
Test point 1 Keyless access control unit connector A (32P) No. 31 Test point 2 Body ground Test point 1 Keyless access control unit connector A (32P) No. 15 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The EXT R+ and EXT R- wires are not shorted. Go to step 3.
- 3. Shorted wire check (EXT R+ line to EXT R- 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
Rear interior LF antenna 2P connector: disconnected
Test point 1 Keyless access control unit connector A (32P) No. 31 Test point 2 Keyless access control unit connector A (32P) No. 15 Is there continuity?
YES
Repair a short in EXT R+ wire to EXT R- wire.
NO
The EXT R+ and EXT R- wires are OK. Go to step 4.
- 4. Keyless access control unit EXT R+, EXT R- line output check:
1. Reconnect the keyless access control unit connector A (32P).
2. Turn the vehicle to the ON mode.
3. Select KEYLESS ACCESS CONTROL from the ONE-PUSH START system select menu with the HDS, and enter FUNCTIONAL TESTS.
4. Connect the voltmeter between test points 1 and 2.
Test point 1 Rear interior LF antenna 2P connector No. 1 Test point 2 Rear interior LF antenna 2P connector No. 2 5. Select REAR INTERIOR ANTENNA L DC OUTPUT with the HDS.
Is there voltage?
YES
Faulty rear interior LF antenna; Replace the rear interior LF antenna - Refer to: Keyless Access LF Antenna (Middle Interior) Removal and InstallationKeyless Access LF Antenna (Front Interior) Removal and InstallationKeyless Access LF Antenna (Rear Interior) Removal and InstallationKeyless Access LF Antenna (Rear Bumper) Removal and Installation .
NO
