Perkins 1106D Troubleshooting Manual page 8

8
Troubleshooting Section
Derate – Certain engine conditions will generate
event codes. Also, engine derates may be applied.
The map for the engine derate is programmed into
the ECM software. The derate can be one or more of
3 types: reduction of rated power, reduction of rated
engine speed, and reduction of rated machine speed
for OEM products.
Desired Engine Speed – The desired engine speed
is input to the electronic governor within the ECM.
The electronic governor uses the signal from the
throttle position sensor, the engine speed/timing
sensor, and other sensors in order to determine the
desired engine speed.
Diagnostic Code – A diagnostic code is sometimes
referred to as a fault code. These codes indicate an
electronic system malfunction.
Diagnostic Lamp – A diagnostic lamp is sometimes
called the check engine light. The diagnostic lamp
is used to warn the operator of the presence of
an active diagnostic code. The lamp may not be
included in all applications.
Digital Sensor Return – The common line (ground)
from the ECM is used as ground for the digital
sensors.
Digital Sensors – Digital sensors produce a pulse
width modulated signal. Digital sensors are supplied
with power from the ECM.
Digital Sensor Supply – The power supply for the
digital sensors is provided by the ECM.
Direct Current (DC) – Direct current is the type of
current that flows consistently in only one direction.
DT, DT Connector, or Deutsch DT – This is a type
of connector that is used on Perkins engines. The
connectors are manufactured by Deutsch.
Duty Cycle – Refer to "Pulse Width Modulation".
Electronic Engine Control – The electronic
engine control is a complete electronic system.
The electronic engine control monitors the engine
operation under all conditions. The electronic engine
control also controls the engine operation under all
conditions.
Electronic Control Module (ECM) – The ECM
is the control computer of the engine. The ECM
provides power to the electronics. The ECM monitors
data that is input from the sensors of the engine. The
ECM acts as a governor in order to control the speed
and the power of the engine.
Electronic Service Tool – The electronic service
tool allows a computer (PC) to communicate with the
ECM.
Engine Monitoring – Engine Monitoring is the part
of the electronic engine control that monitors the
sensors. This also warns the operator of detected
problems.
Engine Oil Pressure Sensor – The engine oil
pressure sensor measures engine oil pressure. The
sensor sends an electronic signal to the ECM that is
dependent on the engine oil pressure.
Engine Speed/Timing Sensor – An engine
speed/timing sensor is a hall effect switch that
provides a signal to the ECM. 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 camshaft.
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.
SENR9982