B1648

DTC Troubleshooting: B1648

DTC B1648:

Front Passenger Door Antenna Circuit Open

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

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

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

4. Check for DTCs with the HDS.

Is DTC B1648 indicated?

YES -

Go to step 5.

NO -

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

5. Turn the ignition switch to LOCK (0).

6. Disconnect keyless access control unit connector C (17P).

7. Disconnect the front passenger's door LF antenna 8P connector.

8. Connect front passenger's door LF antenna 8P connector terminals No. 3 and No. 7 to body ground with jumper wires.






9. Check for continuity between body ground and keyless access control unit connector C (17P) terminals No. 6 and No. 12 individually.





Is there continuity?

YES -

Go to step 10.

NO -

Repair an open or high resistance in the wire.�

10. Reconnect keyless access control unit connector C (17P).

11. Connect the voltmeter between front passenger's door LF antenna 8P connector terminals No. 3 and No. 7.





12. Turn the ignition switch to ON (II).

13. Select FUNCTION TEST from the HDS, and do PASSENGER'S ANTENNA DC OUTPUT.

Is there voltage?

YES -

Faulty the front passenger's door LF antenna, replace the front passenger's door outer handle Service and Repair.�

NO -

Replace the keyless access control unit Keyless Access Control Unit Input Test/Replacement.�