B1657

DTC B1657: Rear Bumper LF Antenna Circuit Short

1. Clear the DTCs with the HDS.
2. Select the TROUBLE CODE MENU from the HDS, then enter the SELF CHECK.
3. Do the SELF CHECK.
4. Check for DTCs with the HDS.

Is DTC B1657 indicated?

YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections at the keyless access control unit and rear bumper LF antenna.

5. Turn the ignition switch OFF.
6. Disconnect keyless access control unit connector B (24P).
7. Disconnect the rear bumper LF antenna 2P connector.




8. Check for continuity between body ground and keyless access control unit connector B (24P) terminals No. 15 and No. 16 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 rear bumper LF antenna 2P connector terminals No. 1 and No. 2.
11. Turn the ignition switch ON (II).
12. Select the FUNCTION TEST MENU from the HDS, and do the TRUNK/TAILGATE/REAR BUMPER ANTENNA L DC OUTPUT.

Is there voltage?

YES - Replace the rear bumper LF antenna.

NO - Replace the keyless access control unit.