B2240

DTC Troubleshooting: B2240

DTC B2240: XM Antenna Error

NOTE: Check the vehicle battery condition first.

1. Connect the HDS to the DLC.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), then turn it ON (II) and wait 30 seconds or more.

4. Check for DTC with the HDS.

Is DTC B2240 indicated?
YES - Go to step 5.

NO - Intermittent failure, the XM antenna is OK at this time. Check for poor connections or loose terminals at the AcuraLink control unit (XM receiver) and the XM antenna.


5. Check the XM antenna lead connection at the AcuraLink control unit (XM receiver) and at the XM antenna.

Is it connected properly?
YES - Go to step 6.

NO - Reconnect the connector, and recheck the DTC.


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

7. Disconnect the AcuraLink control unit (XM receiver) connector C (2P).

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

9. Measure the voltage between the body ground and the AcuraLink control unit (XM receiver) terminal C (2P) terminal No. 1.

Is there about 4.5 V?
YES - Go to step 10.

NO - AcuraLink control unit (XM receiver) is faulty, Update the AcuraLink control unit if it does not have the latest software, then recheck. If the software is the latest, replace the AcuraLink control unit. AcuraLink Control Unit (XM Receiver) Removal/Installation (With AcuraLink (USA With Navigation))






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

11. Disconnect the XM antenna 2P connector.

12. Check for continuity between body ground and the XM antenna 2P connector terminal No. 1.

Is there continuity?
YES - Replace the antenna lead between the AcuraLink control unit (XM receiver) and the XM antenna.

NO - Go to step 13.






13. Check for continuity between the XM antenna 2P connector terminal No. 1 and No. 2 (outside of the lead).

Is there continuity?
YES - Replace the antenna lead between the AcuraLink control unit (XM receiver) and the XM antenna.

NO - Go to step 14.






14. Reconnect the AcuraLink control unit C (2P) connector.

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

16. Measure the voltage between the body ground and the XM antenna 2P connector terminal No. 1.

Is there about 4.5V?
YES - XM antenna is faulty, replace the XM antenna.

NO - Replace the antenna lead between the AcuraLink control unit (XM receiver) and the XM antenna.