PREVOST H3-41 Maintenance Manual page 46

SECTION 01 : ENGINE
FIGURE 2: ENGINE HARNESS CONNECTION POINTS
IMPORTANT NOTE
Disconnection of Auxiliary Emission Control Device - 25% engine derate
Auxiliary Emission Control Device (EACD) defines as any element of design which senses temperature,
vehicle speed, engine RPM, transmission gear, manifold vacuum, or any other parameter for the purpose
of activating, modulating, delaying, or deactivating the operation of any part of the emission control
system.
Disconnection of the following EACD produces immediate activation of the Malfunction Indicator Lamp MIL
and 25% engine derate after three (3) hours of a continuous open circuit.
•Intake throttle position sensor;
•Ambient air temperature sensor;
•Vehicle speed;
•Engine oil pressure sensor;
•Exhaust back pressure sensor;
•Camshaft speed sensor;
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PA1621 Maintenance Manual All Series | Section 01 revised Feb 2019
•EGR delta pressure;
•Fuel rail pressure
•Engine timing sensor;
•Engine coolant temperature;
•EGR temperature sensor.