Specifications

Data Parameters Engine Parameters

LEFT WOT (FULL LOAD)/DECEL.SHUT-OFF

Range: __________________________________________________________ YES/NO

Used on ME10 systems. This parameter indicates whether or not the ECU has shut off fuel

delivery to the left cylinder bank to reduce emissions on deceleration. Display should read YES

on deceleration following wide-open throttle (WOT) and NO at all other times.

LEVER POSITION ACCELERATE

LEVER POSITION DECELERATE

LEVER POSITION OFF

Range: __________________________________________________________ ON/OFF

Used on ME27 and ME28 systems. These parameters indicate the state of the switches on the

cruise control lever positions.

LH-SFI REF. RESISTOR

Range: __________________________________________________________ YES/NO

Used on LH systems. This parameter indicates the sequential fuel injection (SFI) reference

resistor installed. The resistor changes the fuel injection and ignition maps in the ECU. Up to

seven resistors with different calibrations may be activated by relocating plugs in a housing with

an integral resistance matrix. This allows adapting ignition timing to compensate for different fuel

types (random octane number (RON) 91 or 95).

LOAD

Range: _________________________________________________________ 0 to 100%

Used on DM2 and HFM systems. This is an ECU-calculated engine load displayed as a

percentage. The ECU determines engine load based on RPM, number of cylinders, airflow, and

cylinder air charge. Input sensor readings are compared to a theoretical air charge that occurs at

standard temperature and pressure (volumetric efficiency). The resulting ratio, or engine load, is

expressed as a percentage. On an engine running at idle under a normal load, the reading

should be between 20 to 40%. Load should always be lower than 80%.

LOAD CORRECTION FACTOR

Range: _______________________________________________________ variable Nm

Used on ME10, ME20, ME27 and ME28 systems. This is an ECU-calculated engine torque in

Newton meters (Nm). Readings vary according to engine load. The ME-MOTRONIC system

uses torque-led control, which means it calculates the internal torque produced during

combustion. This is the physical force produced by gas pressure during the compression and

power strokes. The actual net torque of the engine has to account for friction, gas transfer loss

and drive power for the water pump, alternator, and A/C compressor. The ME program contains

optimal specifications for charge density, injection duration and ignition timing for any torque.

This makes it possible to obtain optimal emissions and fuel consumption for any operational

mode. ME27 and ME28 system engines operating at normal warm idle should range from 0.700

to 1.300 Nm.

LOW VOLTAGE

Range: __________________________________________________________ YES/NO

Used on DM2 systems. This parameter indicates whether the battery voltage is low, causing the

ECU to behave erratically.