SL 500 (129.067) V8-5.0L (119.972) (1994)
Engine Control Module: Description and Operation
Injection Control
Purpose and Location
LH Control Unit Diagram
PURPOSE
The LH Control module (N3/1) has a microprocessor that receives signals from various input devices regarding engine operating conditions. This
information is evaluated in relation to pre-programmed values and calculates the correct injector frequency (opening duration and injection timing)
to provide optimum performance, economy, and the least emissions output.
Injection Control
OPERATION
The ECM contains several programs and functions which are briefly described below.