Chery QQ6 Service Manual download pdf (Page 10)

3. Phase Sensor

3.1 Function of the sensor:

Provide ECU with phase signal, i.e. help crankshaft position sensor of engine to judge it is then

at compressing top dead center or air exhaust top dead center.

3.2 Principle of the sensor:

The phase sensor is consisted of the Hall generator installed on the valve cover and the signal

wheel machined on the intake camshaft. When the camshaft rotates, the signal wheel will make the

magnetic flux passing the Hall generator change, thus generating a variable Hall signal.

3.3 Effects and judgment method:

l Failure effects: over proof emission and fuel consumption rise etc.

l General cause of the failure: man induced failure.

l Simple measurement method:

(connect the joint) switch on ignition switch but do not start the engine; put digital multimeter on DC

volt shift, connect two meter pen to No. 1 and No. 3 sensor connectors and make sure there is 12V

reference voltage. Start the engine, check if it is in good conditions of No.2 pin by oscillograph on

vehicle.

4. Water Temperature Sensor

4.1 Function of the sensor:

The water temperature sensor simultaneously provides ECU and instruments with water

temperature signal. ECU will calculate and regulate injection pulse-width and ignition advance angle

through water temperature signal. In addition, through water temperature signal, ECU also can

control turn-on and turn-off of cooling fan to prevent engine from damage caused by overheat.

4.2 Principle of the sensor:

The water temperature sensor is a minus temperature coefficient type electric resistance model

sensor; the higher the temperature is, the less the resistance will be. But, temperature rise and

resistance fall are not in linear relation.

Ground site

Phase sensor

87# pin of main relay

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 84 85

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Chery QQ6 Service Manual Page 10