diff --git a/src/com/romraider/io/j2534/api/J2534.java b/src/com/romraider/io/j2534/api/J2534.java
index 26ceee7a..7679b412 100644
--- a/src/com/romraider/io/j2534/api/J2534.java
+++ b/src/com/romraider/io/j2534/api/J2534.java
@@ -17,7 +17,6 @@ public interface J2534 {
 
     void writeMsg(int channelId, byte[] data);
 
-    // FIX - Needs to return msg type, etc. Create Response object.
     byte[] readMsg(int channelId);
 
     void stopMsgFilter(int channelId, int msgId);
diff --git a/src/com/romraider/io/j2534/api/TestJ2534.java b/src/com/romraider/io/j2534/api/TestJ2534.java
index 416ef0ce..46ab08a1 100644
--- a/src/com/romraider/io/j2534/api/TestJ2534.java
+++ b/src/com/romraider/io/j2534/api/TestJ2534.java
@@ -6,6 +6,7 @@ import static com.romraider.io.j2534.op20.OpenPort20.CONFIG_P3_MIN;
 import static com.romraider.io.j2534.op20.OpenPort20.CONFIG_P4_MIN;
 import static com.romraider.io.j2534.op20.OpenPort20.FLAG_NONE;
 import static com.romraider.io.j2534.op20.OpenPort20.PROTOCOL_ISO9141;
+import com.romraider.util.HexUtil;
 
 public final class TestJ2534 {
     private static final J2534 api = new J2534OpenPort20(PROTOCOL_ISO9141);
@@ -26,7 +27,12 @@ public final class TestJ2534 {
                 try {
 
                     byte[] ecuInit = {(byte) 0x80, (byte) 0x10, (byte) 0xF0, (byte) 0x01, (byte) 0xBF};
+
                     api.writeMsg(channelId, ecuInit);
+                    byte[] response = api.readMsg(channelId);
+
+                    System.out.println("Request  = " + HexUtil.asHex(ecuInit));
+                    System.out.println("Response = " + HexUtil.asHex(response));
 
                 } finally {
                     api.stopMsgFilter(channelId, msgId);
diff --git a/src/com/romraider/io/j2534/op20/J2534OpenPort20.java b/src/com/romraider/io/j2534/op20/J2534OpenPort20.java
index 465eab70..4b57b77e 100644
--- a/src/com/romraider/io/j2534/op20/J2534OpenPort20.java
+++ b/src/com/romraider/io/j2534/op20/J2534OpenPort20.java
@@ -88,6 +88,7 @@ public final class J2534OpenPort20 implements J2534 {
         if (status != STATUS_NOERROR) handleError(status);
     }
 
+    // FIX - Needs to check msg type and retry until msg received
     public byte[] readMsg(int channelId) {
         PassThruMessage msg = passThruMessage();
         int[] pNumMsgs = {1};