diff --git a/java_console/io/src/test/java/com/rusefi/binaryprotocol/test/Elm327Sandbox.java b/java_console/io/src/test/java/com/rusefi/binaryprotocol/test/Elm327Sandbox.java
index 50acab54d9..7821816025 100644
--- a/java_console/io/src/test/java/com/rusefi/binaryprotocol/test/Elm327Sandbox.java
+++ b/java_console/io/src/test/java/com/rusefi/binaryprotocol/test/Elm327Sandbox.java
@@ -3,13 +3,10 @@ package com.rusefi.binaryprotocol.test;
 import com.rusefi.binaryprotocol.BinaryProtocol;
 import com.rusefi.binaryprotocol.IncomingDataBuffer;
 import com.rusefi.config.generated.Fields;
-import com.rusefi.io.ConnectionStateListener;
 import com.rusefi.io.IoStream;
-import com.rusefi.io.LinkManager;
 import com.rusefi.io.can.Elm327Connector;
 import com.rusefi.io.serial.BaudRateHolder;
 import com.rusefi.io.serial.SerialIoStream;
-import com.rusefi.io.serial.StreamConnector;
 
 import java.io.IOException;
 
@@ -30,17 +27,18 @@ public class Elm327Sandbox {
         IncomingDataBuffer dataBuffer = tsStream.getDataBuffer();
         System.out.println("Hello new ELM327 connection, pending=" + dataBuffer.getPendingCount());
 
+        /*
         runFcommand("First time", tsStream);
         Elm327Connector.whyDoWeNeedToSleepBetweenCommands();
 
         runFcommand("Second time", tsStream);
         Elm327Connector.whyDoWeNeedToSleepBetweenCommands();
-
+*/
         {
             String signature = BinaryProtocol.getSignature(tsStream);
             System.out.println("Got " + signature + " signature via CAN/ELM327");
-            if (signature == null)
-                return;
+            if (signature == null || !signature.startsWith(Fields.PROTOCOL_SIGNATURE_PREFIX))
+                throw new IllegalStateException("Unexpected S " + signature);
         }
 
         Elm327Connector.whyDoWeNeedToSleepBetweenCommands();
@@ -48,8 +46,8 @@ public class Elm327Sandbox {
         {
             String signature = BinaryProtocol.getSignature(tsStream);
             System.out.println("Let's do it again! Got " + signature + " signature via CAN/ELM327");
-            if (signature == null)
-                return;
+            if (signature == null || !signature.startsWith(Fields.PROTOCOL_SIGNATURE_PREFIX))
+                throw new IllegalStateException("Unexpected S " + signature);
         }
 
         Elm327Connector.whyDoWeNeedToSleepBetweenCommands();
@@ -61,10 +59,18 @@ public class Elm327Sandbox {
                 return;
             String signature = new String(response, 1, response.length - 1);
             System.out.println(Fields.TS_HELLO_COMMAND + " returned " + signature);
+
+            if (!signature.startsWith(Fields.PROTOCOL_SIGNATURE_PREFIX))
+                throw new IllegalStateException("Unexpected S " + signature);
         }
 
         Elm327Connector.whyDoWeNeedToSleepBetweenCommands();
+        System.out.println("***********************************");
+        System.out.println("*****  LOOKS GREAT     ************");
+        System.out.println("***********************************");
+        System.exit(-1);
 
+        /*
         {
             tsStream.sendPacket(BinaryProtocol.createCrcCommand(1000));
             byte[] fResponse = new byte[3];
@@ -87,7 +93,7 @@ public class Elm327Sandbox {
                 System.out.println("onConnectionFailed");
             }
         });
-
+*/
     }
 
     private static void runFcommand(String prefix, IoStream tsStream) throws IOException {