Perkins 1104D NH1 Systems Operation Testing And Adjusting page 41

RENR7967
Engine Speed/Timing Sensor – An engine
speed/timing sensor is a Hall effect sensor. The
ECM interprets this signal as the crankshaft position
and the engine speed. Two sensors are used to
provide the speed and timing signals to the ECM.
The primary sensor is associated with the crankshaft
and the secondary sensor is associated with the fuel
injection pump camshaft.
Estimated Dynamic Timing – Estimated dynamic
timing is the estimate of the actual injection timing
that is calculated by the ECM.
Ether Relay – The ether relay is used to actuate the
ether injection system. The ECM controls the relay.
Event Code – An event code may be activated
in order to indicate an abnormal engine operating
condition. These codes usually indicate a mechanical
problem instead of an electrical system problem.
Failure Mode Identifier (FMI) – This identifier
indicates the type of failure that is associated with
the component. The FMI has been adopted from the
SAE practice of J1587 diagnostics. The FMI follows
the parameter identifier (PID) in the descriptions of
the fault code. The descriptions of the FMIs are in
the following list.
0 – The data is valid but the data is above the normal
operational range.
1 – The data is valid but the data is below the normal
operational range.
2 – The data is erratic, intermittent, or incorrect.
3 – The voltage is above normal or the voltage is
shorted high.
4 – The voltage is below normal or the voltage is
shorted low.
5 – The current is below normal or the circuit is open.
6 – The current is above normal or the circuit is
grounded.
7 – The mechanical system is not responding
properly.
8 – There is an abnormal frequency, an abnormal
pulse width, or an abnormal time period.
9 – There has been an abnormal update.
10 – There is an abnormal rate of change.
11 – The failure mode is not identifiable.
12 – The device or the component is damaged.
13 – The device or the component is not calibrated.
14 and 15 – These locations are reserved for a
future assignment.
Flash Programming – Flash programming is the
method of programming or updating an ECM with an
electronic service tool over the data link.
Fuel Injector E-Trim – Fuel injector E-trim is a
software process that allows precise control of fuel
injectors by parameters that are programmed into
the ECM for each fuel injector. With the use of the
electronic service tool, the service technician can
read status information for the E-Trim. Data for
E-Trim can also be programmed.
Flash Memory – See the Programmable software.
Fuel Ratio Control (FRC) – The FRC is a limit that
is based on the control of the fuel to the air ratio. The
FRC is used for emission control. When the ECM
senses a higher turbocharger outlet pressure, the
ECM increases the limit for the FRC in order to allow
more fuel into the cylinders.
Fuel Pump – See "Fuel Injection Pump".
Fuel Rail – This item is sometimes referred to as
the High Pressure Fuel Rail or high pressure fuel
manifold. The fuel rail supplies fuel to the electronic
unit injectors. The fuel injection pump and the fuel
rail pressure sensor work with the ECM in order to
maintain the desired fuel pressure in the fuel rail. This
pressure is determined by calibration of the engine
in order to enable the engine to meet emissions and
performance requirements.
Fuel Rail Pressure Sensor – The fuel rail pressure
sensor sends an electronic signal to the ECM that is
dependent on the pressure of the fuel in the fuel rail.
Fuel Injection Pump – This item is sometimes
referred to as the High Pressure Fuel Rail Pump.
This is a device that supplies fuel under pressure to
the fuel rail (high pressure fuel rail).
The Solenoid Valve for the Fuel Injection Pump –
This is sometimes referred to as the High Pressure
Fuel Rail Pump Solenoid Valve. This is a control
device in the fuel injection pump. The ECM controls
the pressure in the fuel rail by using this valve to
divert excess fuel from the pump to the fuel tank.
Full Load Setting (FLS) – The FLS is the number
that represents the fuel system adjustment. This
adjustment is made at the factory in order to fine tune
the fuel system. The correct value for this parameter
is stamped on the engine information ratings plate.
This parameter must be programmed.
Systems Operation Section
41