KENR6933 11
Troubleshooting Section
Short Circuit – A short circuit is a condition that has
an electrical c
ircuit that is inadvertently connected to
an undesirable point. An example of a short circuit
is a wire which rubs against a vehicle frame and
this rubbing e
ventually wears off the wire insulation.
Electrical contact with the frame is made and a short
circuit results.
Signal – The signal is a voltage or a waveform that
is used in order to transmit information typically from
a sensor to th
eECM.
Supply Voltage – The supply voltage is a continuous
voltage that
is supplied to a component in order to
provide the 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 supplied by the engine wiring.
System Confi
guration Parameters – System
configuration 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 change
s that have been made to the parameter.
ThetattletaleisstoredintheECM.
Throttle
Position – The throttle position is the
interpretation by the ECM of the signal from the
throttle position sensor or the throttle switch.
Throttle Position Sensor – The throttle position
sensor is a sensor that is usually connected to an
acceler
ator pedal or a hand lever. This sensor sends
a signal to the ECM that is used to calculate desired
engine speed.
Throttle Switch – The throttle switch sends a signal
to the ECM that is used to calculate desired engine
speed.
Timing Calibration – The timing calibration is the
adjustm
ent of an electrical signal. This adjustment is
made in order to correct the timing error between the
camshaft and the engine speed/timing sensors or
betwee
n the crankshaft and the engine speed/timing
sensors.
Top Cen
ter Position – The top center position refers
to the crankshaft position when the engine piston
position is at the highest point of travel. The engine
must b
e turned in the normal direction of rotation in
order to reach this point.
Total
Tattletale – The total tattletale is the total
number of changes to all the parameters that are
stored in the ECM.
Wait T o Start Lamp – This is a lamp that is included
inthecoldstar
ting aid circuit in order to indicate when
the wait to start period has expired. The glow plugs
have not deactivated at this point in time.
Wastegate – Thisisadeviceinaturbocharged
engine that controls the maximum boost pressure
that is provi
ded to the inlet manifold.
Wastegate Regulator (if equipped) – The
wastegate re
gulator controls the pressure in the
intake manifold to a value that is determined by the
ECM. The wastegate regulator provides the interface
between the E
CM and the mechanical system that
regulates intake manifold pressure to the desired
value that is determined by the software.
i02517580
Electronic S ervice To ols
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 To
ol
-
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.
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