600SEL (140.057) V12-6.0L (120.980) (1993)
LH Control Unit Location
LOCATION AND I.D.
The control module for the right cylinder (1-6) bank (N3/3) is located in the module box in engine compartment, passenger side firewall. The
control module connector is color coded dark green/light green.
The control module for the left cylinder (7-12) bank (N3/3) is located in the module box in engine compartment, passenger side firewall. The
control module connector is color coded dark blue/light blue.
Injection Control
OPERATION
The ECUs contain several programs and functions which are briefly described below.
The ECUs use the following information:
^ Voltage supply (+)
^ Starter circuit
^ Engine temperature from coolant temperature sensors (B11/9 or B11/10)
^ Intake air temperature from intake manifold temperature sensors (B17/5 or B17/6)
^ Intake air mass from air mass sensors (B2/3 or B2/4)
^ Various information from the controller area network (CAN)
^ Air/fuel mixture from oxygen sensors (G3/3 or G3/4)
CONTROL FUNCTIONS
Injection Base Quantity (Normal Driving) Function
During normal driving, the ECUs use the input devices to regulate injection frequency and timing. The two most influencing components are:
^
Air mass sensor with hot-wire (B2/3 or B2/4)
^
Engine RPM signal (TN)
Start And Warm-up Function
The start control provides for longer injection duration to enrich the mixture. The final air/fuel mixture is dependent on the engine coolant
temperature. Mixture enrichment stops when the engine is at operating temperature.
Full Load And Acceleration Function
During full load or acceleration, a richer air/fuel mixture is provided to achieve maximum engine power. This will also keep combustion heat and
catalytic converter temperature at an acceptable level.
Deceleration Shut-off Chart