12 KENR9126
Troubleshooting Section
Secondary Speed/Timing Sensor – This sensor
determines the
position of the camshaft during engine
operation. If the primary speed/timing sensor fails
during engine operation, the secondary speed/timing
sensor is used
to provide the signal.
Sensor – A sensor is a device that is used to
detect the cu
rrent value of pressure or temperature,
or mechanical movement. The information that is
detected is converted into an electrical signal.
Short Circuit – A short circuit is a condition that has
an electrical circuit that is inadvertently connected to
an undesira
ble point. An example of a short circuit
is a wire which rubs against a vehicle frame and
this rubbing eventually wears off the wire insulation.
Electrica
l contact with the frame is made and a short
circuit results.
Signal – Th
e signal is a voltage or a waveform that
is used in order to transmit information typically from
a sensor to the ECM.
Supply Voltage – The supply voltage is a continuous
voltage that is supplied to a component in order to
provide t
he electrical power that is required for the
component to operate. The power may be generated
by the ECM or the power may be battery voltage that
is suppl
ied by the engine wiring.
System Configuration Parameters – System
configur
ation parameters are parameters that affect
emissions and/or operating characteristics of the
engine.
Tattletale – Certain parameters that affect the
operation of the engine are stored in the ECM.
These
parameters can be changed by use of the
electronic service tool. The tattletale logs the number
of changes that have been made to the parameter.
The ta
ttletale is stored in the ECM.
Throttle Position – The throttle position is the
inte
rpretation by the ECM of the signal from the
throttle position sensor or the throttle switch.
Thro
ttle Position Sensor – The throttle position
sensor is a sensor that is usually connected to an
accelerator pedal or a hand lever. This sensor sends
asi
gnal to the ECM that is used to calculate desired
engine speed.
Top
Center Position – The top center position
refers to the crankshaft position when the No.1 piston
position is at the highest point of travel. The engine
mu
st be turned in the normal direction of rotation in
order to reach this point.
To
tal Tattletale – The total tattletale is the total
number of changes to all the parameters that are
stored in the ECM.
Wastegate – Thisisadeviceinaturbocharged
engine that con
trols the maximum boost pressure
that is provided to the inlet manifold.
Wastegate Reg
ulator (if equipped) – The
wastegate regulator controls the pressure in the
intake manifold to a value that is determined by the
ECM. The wast
egate regulator provides the interface
between the ECM and the mechanical system that
regulates intake manifold pressure to the desired
value that i
s determined by the software.
i04020489
Electronic Servic e Tools
Perkins electronic service tools are designed to help
the service technician:
•
Retrieve diagnostic codes.
•
Diagnose electrical problems.
•
Read parameters.
•
Program parameters.
•
Install trim files.
Required Service Tools
Table 1
Required Service Tools
Part Number Description
CH11155
Crimp
Tool (12−AWG TO 18−AWG)
2900A019
Wire Removal Tool
27610285
Removal Tool
-
Suitable Digital Multimeter
Two short jumper wires are needed to check the
continuity of some wiring harness circuits by shorting
two adjacent terminals together in a connector. A
long extension wire may also be needed to check the
continuity of some wiring harness circuits.
Optional Service Tools
Table 2 lists the optional service tools that can be
used when the engine is serviced.
To Next Page
Loading...
