Powertrain Management: Description and Operation

ECCS System Diagram:

GENERAL INFORMATION

The Powertrain Management system consists of the sensors which detect the engine condition, the engine control module Engine Control Module (ECM) which controls the engine on the basis of the sensor signals, Automatic Transmission control module which controls the shifting points based on vehicle load and speed, and the actuators which operate under control of the control modules. The ECM controls the fuel injection, idle speed, ignition timing, etc. In addition, the ECM is provided with 2 diagnostic test modes (DTM) to facilitate troubleshooting in case of failure. Alternatively, troubleshooting can be done using the consult scan tool provided by Nissan.

In the event of a component or circuit failure of certain sensors or actuators, the ECM is programed with a Fail-Safe feature. This will allow the vehicle to be driven in a limited capacity.