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AJ-V8/5HP24
49
Engine Management
Sensors
Engine management sensors that input to the
ECM are detailed below:
Barometric Pressure Sensor
The barometric pressure sensor is installed in the
ECM. It senses ambient pressure in the engine
management enclosure of the engine
compartment.
HO2S
A HO2S is installed in the intake end of each
catalytic converter. They provide inputs
proportional to the oxygen content of the exhaust
gases leaving the engine. The heater elements
improve the response time of the sensors during
engine warm-up.
O2S
An O2S is installed in the outlet end of each
catalytic converter. They provide inputs
proportional to the oxygen content of the exhaust
gases leaving the catalytic converter.
Intake Air Temperature Sensor
The intake air temperature sensor is a thermistor
integrated into the same housing as the MAFS, in
the intake duct immediately downstream of the
intake air cleaner. It provides an input inversely
proportional to the temperature of the air in the
duct.
MAFS
The MAFS is a hot wire sensor that provides an
input which is (approximately) proportional to
mass air flow into the engine.
OXYGEN SENSORS
303-119
MAFS/INTAKE AIR TEMPERATURE SENSOR
303-128
H02S
02S