
Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
181
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Apply a small amount of engine oil on seal ring of sensor in order to facilitate the installation.
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Make sure that adhesive of sensor and intake manifold is well,
tighten the self-tapping screw
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Verify reliable installation of wire harness connector.
II. Engine Coolant Temperature (ECT) Sensor
1. Instruction of Parts
The engine coolant temperature sensor measures the engine coolant temperature and sends the signal to
the ECM for control of ignition timing and fuel injection pulse width during start, idling, and normal
running. It adopts one negative temperature coefficient thermistor, of which the resistance reduces
following the increasing of the temperature. Depending on the voltage output of the sensor, the ECM
judges the temperature of coolant and sends gas mixture with best air-fuel ratio to the engine.
2. Installation Position of Element
See figure right for installation positions.
3. Wiring Diagram
Pin 40: 5V Grounding
Pin 41: Cooling water temperature signal output
Fig. 4.3.004