Specifications
59
Data Parameters Engine Parameters
INJECTION TIME, LEFT BANK
INJECTION TIME, RIGHT BANK
INJECTION TIME, CYLINDER 1 to 3
INJECTION TIME, CYLINDER 4 to 6
INJECTION TIME, CYLINDER 10 to 12
Range: __________________________________________________________ variable
Used on ME27 and ME28 systems. These parameters display the injector on time in
milliseconds (ms) for either bank or cylinder groups. Display varies by engine, speed, and load.
Typical range for normal hot idle readings are 2 to 5 ms.
INJECTION SHUT-OFF CYLINDER 1 to 12
Range: __________________________________________________________ YES/NO
Used on ME27 and ME28 systems. The “1 to 12" in the parameter name represents twelve
separate parameters, one for each cylinder. These parameters indicate whether the fuel injection
has been shut-off or not to the various cylinders. The ECU may shut down fuel to individual
cylinders when misfire thresholds are reached. This protects the catalytic converter, limits
excessive emissions, and prevents engine damage. Specific cylinders may also be shut down
during cruise condition fuel economy and low emission operating mode. YES indicates that fuel
injection to a particular cylinder has been shut off.
INTAKE AIR TEMPERATURE
Range: _________________________________________ –60 to 65 °C or –76 to 150 °F
Used on DC12, DM, DM2, EDS, ERE/EVE/ASF (IFI Diesel)), EZ, HFM, LH, ME10, ME20, ME27,
ME28, and SIM4 systems. This parameter displays the temperature of air coming into intake
manifold in °C or °F. Reading is based on the input signal of the intake air temperature (IAT)
sensor. On Diesel system ERE/EVE/ASF (IFI Diesel)), this parameter is used for fuel metering
control, which limits smoke emissions, for controlling EGR, and for intake pressure control. The
measurement units can be changed from degrees Celsius (°C) to degrees Fahrenheit (°F). The
preset measurement is °C.
INTAKE MANIFOLD
INTAKE MANIFOLD SW.-OVER VALVE
Range: __________________________________________________________ ON/OFF
Used on DM2 and HFM and ME20 systems. These parameters display the state of the
resonance flap used in the air induction system. When the display reads OFF, the flap is closed
with the engine running at low speeds. When the display reads ON, the flap is open with the
engine running at high speeds. The pneumatically controlled resonance flap is located on intake
manifold, and effectively creates two different intake manifold lengths. The resonance flap is
connected to the intake manifold switchover valve, which is controlled by the ECU. At low engine
speeds, with the resonance flap closed, air is directed into the longer intake runners. This
increases low-end torque by using the ram air effect. At high engine speeds, with the resonance
flap open, intake air is fed into the short intake runners. This increases the volume of air to meet
the higher demands of the engine.
INTAKE MANIFOLD ABS. PRESSURE
Range: ___________________________________________0 to 1000 mbar, ±100 mbar
Used on DM2 and ERE/EVE/ASF (IFI Diesel)) systems. This parameter, which displays a
manifold absolute pressure reading in millibars (mbar) is used by the ECU for making camshaft
timing adjustments and for detecting EGR flow on EGR-equipped vehicles. On ERE/EVE/ASF
(IFI Diesel)) systems, the pressure sensor is also used for full load metering limiting, EGR, and
intake pressure control to regulate boost.