Perkins 2506 Operation And Maintenance Manual page 30

30
Operation Section
Sensors and Electrical Components
• Desired Speed Input
The Diagnostic output differs from the Warning and
Shutdown outputs. The outputs refer to the operation
of the engine. The Diagnostic output refers to the
condition of the electronic system and software
system.
A diagnostic fault may develop on the lubricating oil
pressure or coolant temperature sensors. For
example, if a Shutdown protection sensor has a fault,
this will result in an engine shutdown, unless the
system is in critical protection override. If a diagnostic
fault occurs with one of the engine speed sensors
while the engine is running. The engine continues to
run by using the other timing sensor for reference.
Sensors and Electrical
Components
Sensor Locations
Illustration 20 shows the typical locations of the
sensors on the engine. Specific engines may appear
different from the illustration due to differences in
applications.
Illustration 20
(1) Engine coolant temperature sensor
(2) Camshaft position sensor
(3) Inlet manifold pressure sensor
i02572884
(4) Fuel temperature sensor
(5) Inlet manifold temperature sensor
(6) Electronic control module (ECM)
SEBU8313-02
(7) Engine oil pressure sensor
(8) Atmospheric pressure sensor
(9) Crankshaft position sensor
g01279775