Tech 1A. ®. , Mastertech ® is a registered trademark of Vetronix Corp. When using this manual to diagnose a vehicle, take the time to determine the type Operator's Manual. Vetronix Corporation. Tech 1. ®. , Tech 1A When using the Asian Imports Software and a TECH 1A on OBD II compliant controllers,tech 1A. Operator's Manual tech 1A. Vetrenix/. TRBL. OLTAGELOW. CODE 22. EXIT. ENTE . Vetronix Corp. Diagnostics for Vehicle Electronics VETRONIX TECH 1 OR TECH 1A ISUZU 87-95 SYSTEMS CARTRIDGE PN3000129 loading Tech 1 TK06032A Vetronix Chevrolet 90-92 EEPROM Data 2.0 Cartridge w/ manual.