Electronic Service Tools - Perkins NJ Series Troubleshooting Manual

12
Troubleshooting Section
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 Configuration 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 changes that have been made to the parameter.
The tattletale is stored in the ECM.
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
accelerator 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
adjustment 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
between the crankshaft and the engine speed/timing
sensors.
Top Center 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 be 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 To Start Lamp – This is a lamp that is included
in the cold starting 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 – This is a device in a turbocharged
engine that controls the maximum boost pressure
that is provided to the inlet manifold.
Wastegate Regulator (if equipped) – The
wastegate regulator controls the pressure in the
intake manifold to a value that is determined by the
ECM. The wastegate regulator provides the interface
between the ECM and the mechanical system that
regulates intake manifold pressure to the desired
value that is determined by the software.

Electronic Service 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
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.
SENR9982-01
i02517580
Description