I have a 2005 toyota corolla . i also have a 2003 nissan x trail .i have a LAUNCH OBD11 scanner. when i attach the scanner to the DLC connector of the nissan everything works fine.but when i attach the scanner to the toyota all the scanner say . cannot communicate with the ECU .pin 7 of the DLC connector is the ISO9141 protocol for both nissan and toyota . both connectors have pin 7 .i was looking through the toyota MANUAL AND IT SAY IN THERE THAT TOYOTA PROTOCOL IS ISO9141-2 . NOW PIN 15 ON THE DLC CONNECTOR IS THE ISO9141-2 .BOTH NISSAN AND TOYOTA HAVE NOT GOT PIN 15 . CAN YOU PLEASE TELL WHAT I HAVE TO DO TO BE ABLE TO MAKE THE TOYOTA WORK ? IS THERE A SPECIAL SCANNER FOR THE TOYOTA ? AND WHAT IS THE BEST SCANNER TO BUY THAT SUITS THE TOYOTA