System Overview, Motronic 5.2

The Motronic engine management system mainly controls ignition and fuel injection.

The Motronic 5.2 supersedes the Motronic 2.8.1 system on model year 1996 and later U.S. specification Saab 9000 cars equipped with the B308 engine.





Starting with M96, OBD II is scheduled for introduction in the US market. This entails the following component changes as compared with the Motronic 2.8.1:
^ Control module with 88-pin connector
^ Oxygen sensors after the three way catalytic converters
^ A number of sensors are fitted with different connectors and/or gold-plated pins
^ The oxygen sensors are grounded directly to the control module by a separate lead.

In other respects, the engine management system is similar to the Motronic 2.8.1 fitted to Saab 9000 cars equipped with the B308 engine.