In hybrid vehicle, there have been two oil pumps, mechanical and electrical to supply oil pressure for transmission and new trend is to merge into electrical pump to improve fuel efficiency. Purpose of this study is to make standardization of firmware development process for Oil Pump Unit (OPU) and Electric Oil Pump (EOP) which is used for hybrid automatic transmission to supply proper torque. In old-fashioned non-Operating System (OS) firmware, it was convenient to calculate control timing for motor control, however the firmware was deeply dependent to specific MCU. It means that much of efforts and time are needed if new MicroController Unit (MCU) were applied. In this study, new development process for MCU firmware could be built based on AUTomotive Open System ARchitecture (AUTOSAR) platform. It also achieved similar motor control performance compared with non-OS based firmware by not utilizing standard AUTOSAR I/O driver & Real Time Environment (RTE) scheduling but by implementing Complex Device Driver (CDD).