Bosch AL952 - SH725xx

Bosch AL952 - SH725xx | Errors & Solutions

Errors

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Further Information on Bosch AL952 - SH725xx

About the Control Unit

The Bosch AL952 is a modern Engine Control Unit (ECU) that utilizes a powerful Renesas SH725xx series microcontroller. These ECUs are part of the broader Bosch MDG1 family, renowned for their advanced processing capabilities and sophisticated security measures. They are commonly found in recent petrol and diesel vehicles from leading European manufacturers, managing complex engine parameters to ensure optimal performance, fuel efficiency, and emissions compliance. Communication with these units is typically performed via Bench mode due to enhanced security protocols.

Common Car Models

BMW 3 Series (G20)
Audi A6 (C8)
Volkswagen Golf (Mk8)
Mercedes-Benz C-Class (W206)
Porsche 911 (992)
Seat Leon (Mk4)
Skoda Octavia (Mk4)

Technical Concepts Explained

SH725xx Microcontroller: A family of 32-bit microcontrollers from Renesas, known for their high performance and features tailored for automotive powertrain applications. They are the 'brain' of the ECU, executing all the complex software.
Bench Mode: A method of reading and writing to an ECU without opening the unit. It involves making direct connections to specific pins on the ECU's connector, allowing for a stable and comprehensive data transfer, bypassing some of the vehicle's security systems like the SGW (Security Gateway).
CVN (Calibration Verification Number): A checksum calculated from the calibration data within the ECU software. It is used by manufacturers and regulatory bodies to verify that the software has not been tampered with. After a modification, the CVN will change unless corrected by the tuning tool.