Specifications

Data Parameters Engine Parameters

INERTIA FUEL SHUTOFF

Range: _________________________________________________ ON/OFF or YES/NO

Used on ME27 and ME28 systems. This parameter indicates if the ECU has temporarily shut off

fuel injection during deceleration to reduce emissions. The display reads ON or YES if the ECU

commands the injectors off during deceleration, and reads OFF or NO at all other times. Certain

conditions must be met to activate: engine coolant temperature must be above 122 °F (50 °C),

engine speed above 2100 RPM, and vehicle speed over 22 mph. The ECU recognizes

deceleration when the throttle valve position is less than that required for a specific engine

speed, or when the throttle idle contacts are closed. Once RPM drops to 1000, the injectors

switch back on and the ignition timing is momentarily retarded to avoid a surge in power.

INJECTION DURATION CORRECTION

Range: _________________________________________________________ 0 to 100%

Used on LH systems. This parameter displays the additional time that the ECU is commanding

the fuel injectors on to compensate for natural flow rate inconsistencies. As injectors open and

close they induce pressure waves in the fuel lines that cause flow rate inconsistencies. An

adaptation factor correlated to engine speed and injector duration is used to compensate. Under

normal conditions the correction should be less than 25%.

INJECTOR

INJECTION DURATION

INJECTION DURATION LEFT

INJECTION DURATION RIGHT

INJECTION TIME

Range: __________________________________________________________ variable

Used on HMF, ME10, ME20 and SIM4 systems. These parameters display the length of time in

milliseconds (ms) that the ECU is commanding the indicated fuel injectors to turn on, or open.

Display varies by engine, speed, and load.

Normal ranges for an HFM system with the engine running at hot idle are: 11 to 17 ms for a 104

engine, and 3 to 5 ms or 14 to 16 ms for a 111 engine. Normal range for ME10, ME20, and SIM4

systems running at hot idle is 2 to 5 ms.

INJECTION TIME ADV. TRAVEL

Range: ______________________________________________________ not available

Used on ERE_EVE_ASF (IFI Diesel). This parameter is the actual injection timing advance in

millimeters (mm). The ECU controls injection timing inside the main injection pump. An actuator

adjusts the injection cam to advance or retard positions.

INJECTION LONG-TERM ADAPTATION

INJECTION SHORT-TERM ADAPTATION

INJECTION SYSTEM

INJECTOR ACTIVATION

Range: __________________________________________________________ YES/NO

Used on DM and DM2 systems. These parameters indicate whether the onboard diagnostic

system has run tests for the injection system. YES indicates that the system has run the test.