Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -rfc12876da6930c955864352182aee2076513a1cc -r2b2d7945bca8305ecd7f9577ad7d8457089282f2
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision fc12876da6930c955864352182aee2076513a1cc)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 2b2d7945bca8305ecd7f9577ad7d8457089282f2)
@@ -265,10 +265,34 @@
     msg.payload[ 0 ] = cmd;
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
-    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_NOT_REQUIRED );
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
 
     return result;
-}
+}
+
+/*********************************************************************//**
+ * @brief
+ * The sendUIVersionRequest function constructs a UI version request msg
+ * to the UI and queues the msg for transmit on the appropriate CAN channel.
+ * @details Inputs: none
+ * @details Outputs: UI version request msg constructed and queued.
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendUIVersionRequest( void )
+{
+    BOOL result;
+    MESSAGE_T msg;
+
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_HD_UI_VERSION_INFO_REQUEST;
+    msg.hdr.payloadLen = 0;
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
+
+    return result;
+}
 
 /*********************************************************************//**
  * @brief
@@ -3467,15 +3491,9 @@
     U08 *payloadPtr = msg.payload;
 
     // Get UI version data from this request msg and have it recorded
-    if ( sizeof(UI_VERSIONS_T) == message->hdr.payloadLen )
-    {
-        UI_VERSIONS_T uiVersion;
+    handleUIVersionResponse( message );
 
-        memcpy( &uiVersion, &message->payload[0], sizeof(UI_VERSIONS_T) );
-        signalUIVersion( uiVersion );
-    }
-
-    // Populate payload
+    // Populate payload for response
     payload.major = (U08)HD_VERSION_MAJOR;
     payload.minor = (U08)HD_VERSION_MINOR;
     payload.micro = (U08)HD_VERSION_MICRO;
@@ -3497,6 +3515,27 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleUIVersionResponse function handles a response to request for
+ * UI version information.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle.
+ * @return none
+ *************************************************************************/
+void handleUIVersionResponse( MESSAGE_T *message )
+{
+    // Get UI version data and have it recorded
+    if ( sizeof(UI_VERSIONS_T) == message->hdr.payloadLen )
+    {
+        UI_VERSIONS_T uiVersion;
+
+        memcpy( &uiVersion, &message->payload[0], sizeof(UI_VERSIONS_T) );
+        signalUIVersion( uiVersion );
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleDGVersionResponse function handles a response for DG f/w version.
  * @details Inputs: none
  * @details Outputs: message handled, DG version info recorded.