DTC B2240: XM Antenna line failure

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Connect the HDS to the DTC (see General Troubleshooting Information .
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0), and then back to ON (II), and wait 30 seconds or more.
Check for DTCs 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.
Check the XM antenna lead connection at the AcuraLink control unit (XM receiver) and at the XM antenna.
Is it connected properly?

YES -Substitute a known-good XM antenna (see AM/FM ANTENNA AMPLIFIER REPLACEMENT ), and recheck. If the symptom/indication goes away, replace the original XM antenna (see AM/FM ANTENNA AMPLIFIER REPLACEMENT ). If the symptom/indication is still present, update the AcuraLink control unit (see AcuraLink Control Unit Update ) if it does not have the latest software, and recheck. If the software is the latest, replace the AcuraLink control unit (XM receiver) (see ACURALINK CONTROL UNIT (XM RECEIVER) REMOVAL/INSTALLATION ).

NO -Reconnect the connector, and recheck the DTC.