Index: MsgDefs.h
===================================================================
diff -u -re31db63cec48e8143ad11cda8bf672690db7539b -r0f4fe8dad87fbf64a08a3649040840a778e2c278
--- MsgDefs.h	(.../MsgDefs.h)	(revision e31db63cec48e8143ad11cda8bf672690db7539b)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 0f4fe8dad87fbf64a08a3649040840a778e2c278)
@@ -209,8 +209,9 @@
     MSG_ID_HD_RESPONSE_SERVICE_MODE_REQUEST = 0xB1,                     ///< HD response to UI request to go to service mode
     MSG_ID_HD_REQUEST_UI_FINAL_POST_RESULT = 0xB2,                      ///< HD request to UI for final POST result
     MSG_ID_DG_FLOW_SENSORS_DATA = 0xB3,                                 ///< DG flow sensors data publish
-    MSG_ID_DG_RESPONSE_SERVICE_MODE_REQUEST = 0xB4,                     ///< DG response to UI request to go to service mode
+    MSG_ID_DG_RESPONSE_SERVICE_MODE_REQUEST = 0xB4,                     ///< DG response to HD request to go to service mode
     MSG_ID_HD_REQUEST_DG_ALARMS = 0xB5,                                 ///< HD request for DG to re-send trigger messages for each active alarm
+    MSG_ID_HD_REQUEST_DG_SERVICE_MODE = 0xB6,                           ///< HD request for DG to to go to service mode
 
 #ifdef EMC_TEST_BUILD
     MSG_ID_CAN_ERROR_COUNT = 0x999,  // test code in support of EMC testing