Engine Management System BOSCH MOTRONIC M5.2.1 System Overview

 Engine Management System  BOSCH MOTRONIC M5.2.1 System Overview

This is quite a sophisticated Petrol Engine management system which is manufactured by Bosch.

This ECU was one of the first Flash memory based ECU’s with a huge memory the entire code

that controls it’s operationally and functionality including its self diagnostic capability. It has

capability to incorporate and control many additional sub systems such as evaporative control

used in LEV (Low Emission Vehicle) applications and Secondary Air injection, although not

fitted in all markets. 

Although used extensively in quite a variety of BMW models and having

many other mentions, the system was also fitted as a replacement of the previous Lucas Sagem

Gems engine management into the petrol versions of the P38 Range Rover after the 1999 model

Re vamp and stayed in service to the end of production. It was also utilized In the V8 variant of

the Discovery Series II. Having CAN bus communication capability, the system co exists with a

new auto box control system giving much smoother drivability.

The ECU support the limited degree of information and fault codes provided for by enforced

OBDII compliance, but of course there many more fault codes, functions and features that this

module gives access to beyond simple OBDII compatibility, including security link learning and

re synchronization. The Module also gives access to the diagnostic capabilities provided in the

sub systems that are not fitted in all markets.