DTC 115: Lost Communication with the SH-AWD Control Unit
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.
- Check for SH-AWD system DTCs with the HDS (see
GENERAL TROUBLESHOOTING INFORMATION
).
Are any DTCs indicated?
YES -Troubleshoot the indicated SH-AWD system DTC(s).
NO -Go to step 2.
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Turn the ignition switch to ON (II), then wait for 10 seconds, and press the MAIN switch ON.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
Is DTC 115 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Turn the ignition switch to LOCK (0).
- Disconnect the ACC unit 20P connector.
- Disconnect SH-AWD control unit connector A (20P).
- Check for continuity between ACC unit 20P connector terminal No. 10 and SH-AWD control unit connector A (20P) terminal No. 10.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 9.
NO -Repair an open in the wire between the ACC unit and the branch of the F-CAN A line (F-CAN A H).
- Check for continuity between ACC unit 20P connector terminal No. 20 and SH-AWD control unit connector A (20P) terminal No. 20.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Check for loose or poor connections. If OK, update the ACC unit (see ACC UNIT UPDATE ), then recheck. If the ACC unit was already updated, replace the ACC unit (see ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION ).
NO -Repair an open in the wire between the ACC unit and the branch of the F-CAN A line (F-CAN A L).