The communication from the programmer is not reaching the target.
This occurs when the ACK slot is not set for the CAN frame of command data sent from the programmer, and transmission after retries also fails.
<Causes and Solutions for the Error>
・There is a problem with the wiring or termination resistor
→ Check for open wires and ensure that the termination resistor is correctly positioned.
・The ECU being programmed is not functioning correctly.
・The ECU is not starting up correctly, or an error has occurred on the bootloader.
・The necessary applications or boot programs have not been programmed
to the ECU's flash memory.
*If you have never been able to program successfully, please also check
the programmer's settings (whether you are using the correct definition file and
Micom Pack for the target ECU, whether the communication baud rate setting matches
the target ECU, etc.).