Added step 6.15: confirm the communication problem is solved. Also added a...

Added step 6.15: confirm the communication problem is solved.  Also added a missing 'exit' that was needed in 6.14.

6-asyn-troubleshooting.md

@@ -252,9 +252,10 @@ When the position is queried manually, the I/O status and severity return to `NO
 
 ### 6.14 Solve the communication problem
 
-IOC's configuration needs to be modified so the change to the input terminator persists across IOC restarts.
+IOC's configuration needs to be modified so the change to the input terminator persists across IOC restarts.  Stop the IOC to get the command prompt back.
 
 ```
+kmp> exit
 $ gedit iocsh/vmc.cmd &
 ```
 
@@ -282,4 +283,14 @@ index 3754207..b39d863 100644
 ```
 </details>
 
+### 6.15 Confirm the communication problem is solved
+
+Restart the IOC:
+
+```
+$ ./softioc/xxx.sh run
+```
+
+Move the motor and confirm there isn't a controller error.
+
 ## [The End](README.md)