Some buyer will complain that the gm tech 2 can not work normally after they receive it. It’s very expensive to return the whole gm tech2 package. So we usually recommend them to find out which part has problelm in deed, the VCI or the OBD2 connector or the Candi. Now we will teach you how to do tech 2 scanner candi self-test.
1. Connect main unit and candy by the main cable and obd2 adapter, obd2 main unit connected to the main unit, and the obd2 adapter to the car, candi connected to the obd2 adapter and main unit
2. Turn on the car and power on the main unit, if the connection has no problem, the screen will show Candi Module Attached.
3. Main Menu-F4 Tool Options-F7 CANdi Diagnostics-F1 Self Test-Test Complete-Candi Present Pass-The candi will blink green light-Finsh
During the tech 2 scanner candi self test process, if no candi module attached notice or can not finish the self test, it means the candi has problem and you need to send it back to repair or exchange.