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TMAP Sensor
COOLANT TEMPERATURE SENSOR
The Engine Coolant Temperature sensor or ECT is
a variable resistance thermistor that changes resis-
tance as the engine's coolant temperature
changes. The sensor's resistance is monitored by
the ECM to determine a cold start condition and to
regulate various fuel and emission control functions
via a closed loop emission system.
Coolant Temperature Sensor
OIL PRESSURE SENDER
The Engine Oil Pressure Sender is designed to en-
sure adequate lubrication throughout the engine. It
is monitored by the ECM. If the pressure drops, a
MIL will occur.
Oil Pressure Sender
IGNITION SYSTEM
The ignition system spark system uses a Crank
Position and Camshaft Position sensor for engine
timing. A coil assembly contain an ignition coil
and an ignition module supplies the ignition spark
for the system. The coil is fired for each cylinder
over two engine revolutions. The distributor
routes each spark event to the appropriate cy-
linder spark plug. The plug is fired near the top of
the compression stroke to ignite the fuel and air
mixture.
CAM SENSOR
In the 2011 engine the CAM sensor and a cam
signal wheel are incorporated into the ignition dis-
tributor mounted on the side of the engine block.
CRANK SENSOR
Crank Sensor
The crank position sensor is a Hall effect sensor
that is triggered by a reluctor wheel on the crank-
shaft. Two missing teeth are used to determine
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