26 SEBU8337
Operation Section
Features and Controls
g01386180
Illustration 1 7
(1) Engine coolant temperature sensor
(2) Intake m anifold pressure sensor
(3) Intake manifold air temperature sensor
(4) Atmospheric pres sure sensor
(5) Secondary position sensor (Camshaft)
(6) Engine o il pressure sensor
(7) Fuel temperature sens or
(8) Primary position sensor (Crankshaft)
(9) Electronic control module (ECM)
Failure of Sensors
All Sensors
A failure of any of the sensors may be caused by one
of the following malfunctions:
•
Sensor output is open.
•
Sensor output is shorted to “- battery” or “+ battery”.
•
Measured reading of the sensor is out of the
specification.
Programmable Mon itoring System
(PMS)
The Programmable Monitoring System determines
the level of action that is taken by the Engine Control
Module (ECM) in response to a condition that can
damage the engine. These conditions are identified
by the ECM from the signals that are produced from
the following sensors.
Engine Coolant Temperature
Sensor 1
The coolant temperature sensor monitors engine
coolant temperature. The output of the ECM can
indicate a high coolant temperature through a relay
or a lamp. The coolant temperature sensor is used
by the ECM to determine initiation of the Cold Start
Condition.
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