B1645

DTC Troubleshooting: B1645

DTC B1645:

Driver Door Antenna Circuit Short

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 B1645 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 B (24P).

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

8. Check for continuity between body ground and keyless access control unit connector B (24P) terminals No. 13 and No. 14 individually.





Is there continuity?

YES -

Repair a short to ground in the wire.

NO -

Go to step 9.

9. Reconnect keyless access control unit connector B (24P).

10. Connect the voltmeter between driver's door LF antenna 8P connector terminals No. 3 and No. 7.





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

12. Select FUNCTIONAL TESTS from the TEST MODE menu with the HDS, and do DRIVER'S ANTENNA DC OUTPUT.

Is there voltage?

YES -

Faulty the driver's door LF antenna, replace the driver's door outer handle Service and Repair.

NO -

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