DTC B1645: Driver's Door LF Antenna Circuit Short
| DTC Description | DTC |
|---|---|
| B1645 Driver's door 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. 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.
4. Check for DTCs with the HDS.
DTC Description DTC B1645 Driver's door LF antenna circuit short Is DTC B1645 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 FR DR+, EXT FR DR- lines):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Keyless access control unit connector A (32P) Driver's door outer handle 8P connector 3. Check for continuity between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode Keyless access control unit connector A (36P): disconnected
Driver's door outer handle 8P connector: disconnected
Test point 1 Keyless access control unit connector A (32P) No. 13 Test point 2 Body ground Test point 1 Keyless access control unit connector A (32P) No. 29 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The EXT FR DR+ and EXT FR DR- wires are not shorted. Go to step 3.
- 3. Shorted wire check (EXT FR DR+ line to EXT FR DR- 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
Driver's door outer handle 8P connector: disconnected
Test point 1 Keyless access control unit connector A (32P) No. 13 Test point 2 Keyless access control unit connector A (32P) No. 29 Is there continuity?
YES
Repair a short in EXT FR DR+ wire to EXT FR DR- wire.
NO
The EXT FR DR+ and EXT FR DR- wires are OK. Go to step 4.
- 4. Keyless access EXT FR DR+, EXT FR DR- line output check:
1. Reconnect the following connector.
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 Driver's door outer handle 8P connector No. 2 Test point 2 Driver's door outer handle 8P connector No. 6 5. Select DRIVER'S DOOR ANTENNA with the HDS.
Is there voltage?
YES
Faulty driver's door LF antenna; replace the driver's door outer handle .
NO
