Processor evidence
Bosch's Automotive Electrics and Automotive Electronics, page 199, figure 3, illustrates an M4.4.1 with 80C517A. The Siemens 80C517 manual describes the 80C517 architecture as 8051-compatible. This identifies the illustrated example; confirm the exact processor marking and board revision.
Application scope
A Volvo service bulletin for the 1998 S70 T-5 refers to M4.4.1 control modules. Confirm the part number and local service information.
Identification and scope
Record the Bosch and vehicle-manufacturer ECU part numbers, engine code, market, year, hardware and software identity. Identify the processor from the specific unit before relying on its architecture. No pinout, interchangeability or programming procedure is established by a family designation alone.