Perkins 2506 Operation And Maintenance Manual page 32

32 SEBU8313-02
Operation Section
Sensors and Electrical Components
Failure of the Engine Oil Pressure Sensor
The ECM will detect failure of the engine oil pressure
sensor. The diagnostic lamp warns the user about
the status of the engine oil pressure sensor. The
engine oil pressure related strategies will be disabled
in the event of a failure of the engine oil pressure
sensor. A failure of the engine oil pressure sensor will
cause a shutdown of the engine. The faulty sensor
should be replaced. Refer to Disassembly and
assembly Manual, "Engine Oil Pressure Sensor -
Remove and Install".
Crankshaft Position Sensor 9
If the ECM does not receive a signal from the
crankshaft position sensor , the "DIAGNOSTIC" lamp
will indicate a diagnostic fault code which will be
logged in the ECM memory.
If the ECM does not receive a signal from the
crankshaft position sensor (9), the ECM will read the
signal from the camshaft position sensor (2). The
ECM continually checks in order to determine if there
is a signal from both sensors. If either sensor fails,
the faulty sensor should be replaced. Refer to
Disassembly and Assembly Manual, "Crankshaft
Position Sensor - Remove and Install" or refer to
Disassembly and Assembly Manual, "Camshaft
Position Sensor - Remove and Install".
Intermittent failure of the sensors will cause erratic
engine control.