As the automotive world moves to encrypted CAN FD and Ethernet diagnostics, tools like Opcom with v1.99 will fade into history. But for now, they remain the most powerful $30 investment a GM/Opel DIY mechanic can make.
The chip uses a bootloader to accept new hex files. If the firmware matches the hardware capabilities, the device functions correctly. If it does not, the device becomes unresponsive (bricked). The Reality of Firmware Version 1.99 Opcom Firmware 1.99 Hex File
This indicates a driver mismatch or a complete lack of power to the PIC chip. Re-verify your FTDI USB drivers and ensure the vehicle ignition is turned to the "ON" position to energize the OBD port. As the automotive world moves to encrypted CAN
: Open the plastic casing of your tool. If the main processor chip does not say "PIC18F458", do not attempt to flash it with any hex file. If the firmware matches the hardware capabilities, the
Flashing firmware carries a risk of "bricking" your device if the power is interrupted or the wrong hex file is used. Proceed with caution. Prerequisites: An OP-COM Clone Interface (with PIC18F458 chip). A PIC programmer (e.g., PICkit3 or USB Programmer). The Opcom Firmware 1.99 Hex File .
+-------------------------------------------------------------+ | OP-COM DIAGNOSTIC INTERFACE | | | | +--------------------+ +--------------------+ | | | FTDI CHIP | | MICROCONTROLLER | | | | (e.g., FT232RL) |<-------->| (PIC18F458) | | | | Handles USB to COM | | Holds Flash Hex | | | +--------------------+ +--------------------+ | +-------------------------------------------------------------+ 1. The Microcontroller (MCU)