SL 600 (129.076) V12-6.0L (120.981) (1995)
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LH Control Unit Diagram For Left Cylinder (7-12) Bank
PURPOSE
The two LH Control modules (N3/2 and N3/3) have 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.
Two separate fuel injection systems (one control module per system) are required. One system operates cylinders 1 through 6 and the other
cylinders 7 through 12.
Injection Control
OPERATION
The ECUs contain several programs and functions which are briefly described below.
The ECUs use the following information:
