Chery QQ Service Manual download pdf (Page 24)

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

make the heat exchange different of the heat

diaphragm of both sides.

This will make the temperature of two sensing

element measuring point inside of the flowmeter

Changes differently and appears difference in

temperature. And the difference of the temperature

will increase with the increase of the airflow.

Big/small and positive/negative of the temperature

difference improved the quality and direction of the

airflow. And the inside evaluate circuit will transfer

the temperature difference to voltage signal and

output.

5)Working temperature:-40--125★

6)Malfunction and diagnosis method

 Reason: sensing element is polluted by the dust

particle, oil and water and causes the part invalid.

 Service notice: 1, it is prohibited to use erosion

liquid to clean sensing element during service; 2,

not to use high pressure air to impact sensing

element; 3, make sure there are no dust into air

pipe when you change air cleaner and no

unqualified air into air cleaner.

 Simple measuring method: static measurement:

(zero flow measurement) No. 3 grounding; No. 4

input 5V reference voltage; No.2 input 14V rated

voltage; check No. 5 output voltage, if the output

is bigger than 1.025V, we can confirm the

function of this sensor is not qualified. Dynamic

measurement: if it is confirmed the sensor is

broken, connect a tail gas analysis meter to

exhaust pipe and check it by using “two working

conditions method”: 1, idle speed working

conditions; 2, 2000rpm stable working conditions.

Check the reading of HC 、CO、CO

, normally

HC<100ppm CO<0.5%,CO

>13.5%

3.10 DOUBLE SPARK IGNITION COIL

1)Exterior and pin definition

No. 1 coil primary winding connect with No.5 pin of

ECU; No. 2 coil primary winding connect with No. 2

http://WWW.FORA-CLUB.RU

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 69 70

Comments to this Manuals

No comments

Chery QQ Service Manual Page 24

Comments to this Manuals

Related products and manuals for Cars Chery QQ