42
S06
INSTRUMENTATION
Explanation table of SPN codes
SPN SPN Name
SPN Description
46
Pneumatic Supply Pressure
Pneumatic pressure in the main reservoir, sometimes referred to as the wet tank.
51
Engine Throttle Valve 1 Position
Position of the valve used to regulate the supply of a fluid, usually air or fuel/air
mixture, to an engine.
91
Accelerator Pedal Position 1
The ratio of actual position of the analogue engine speed/torque request input
device (such as an accelerator pedal or throttle lever) to the maximum position of
the input device.
94
Engine Fuel Delivery Pressure
Gage pressure of fuel in system as delivered from supply pump to the injection
pump.
97
Water In Fuel Indicator
Signal which indicates the presence of water in the fuel.
98
Engine Oil Level
Ratio of current volume of engine sump oil to maximum required volume.
100 Engine Oil Pressure
Gauge pressure of oil in engine lubrication system as provided by oil pump.
102 Engine Intake Manifold #1 Pressure
The gauge pressure measurement of the air intake manifold.
103 Engine Turbocharger 1 Speed
Rotational velocity of rotor in the turbocharger.
105 Engine Intake Manifold 1 Temperature Temperature of pre-combustion air found in intake manifold number 1 of engine air
supply system.
107 Engine Air Filter 1 Differential
Pressure
Change in engine air system pressure, measured across the filter, due to the filter
and any accumulation of solid foreign matter on or in the filter.
108 Barometric Pressure
Absolute air pressure of the atmosphere.
110 Engine Coolant Temperature
Temperature of liquid found in engine cooling system.
111 Engine Coolant Temperature
Ratio of volume of liquid found in engine cooling system to total cooling system
volume.
131 Engine Exhaust Back Pressure
Mass flow rate of fresh air entering the engine air intake, before any EGR mixer, if
used.
132 Engine Intake Air Mass Flow Rate
156 Engine Injector Timing Rail 1 Pressure The gage pressure of fuel in the timing rail delivered from the supply pump to the
injector timing intake.
167 Charging System Potential (Voltage)
Electrical potential measured at the charging system output. The charging system
may be any device charging the batteries.
168 Battery Potential/Power Input 1
This parameter measures the first source of battery potential as measured at the
input of the ECM/actuator etc. coming from one or more batteries, irrespective of
the distance between the component and the battery.
171 Ambient Air Temperature
Temperature of air surrounding vessel / engie compartment.
172 Engine Air Intake Temperature
Temperature of air entering vehicle air induction system.
174 Engine Fuel Temperature 1
Temperature of fuel passing through the first fuel control system.
175 Engine Oil Temperature 1
Temperature of the engine lubricant.
188 Engine Speed At Idle, Point 1 (Engine
Configuration)
Stationary low idle speed of engine which includes influences due to engine
temperature (after power up) and other stationary changes (calibration offsets,
sensor failures, etc).
190 Engine Speed
Actual engine speed which is calculated over a minimum crankshaft angle of 720
degrees divided by the number of cylinders.
234
Software Identification
Software identification of an electronic module.
Continuing next page on SPN # 532.
Summary of Contents for N16.1000 CR3
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