Chery A11. Manual — part 110

b voltmeter

method:

Remove sensor connector, turn ignition on, measure 5V reference voltage at sensor

connection. Connect a voltmeter between Pin B22 and ground. If 5V reference voltage is

not sufficient, check ECU voltage at this wire. If ECU voltage is normal but not sufficient at

sensor, repair 5V reference voltage wire. If ECU voltage is low, test ECU. Connector

sensor connector, turn ignition on, connect a voltmeter between sensor signal wire (Pin B17)

and ground wire. Voltmeter reading shows throttle open signal from sensor to ECU. Depress

throttle slowly and watch voltage change. Voltage reading should be even and increase

gradually. Voltage output should be 0.5±0.02V when engine idles and ≤4.85V at

throttle wide open.

Fuel supply system

2.2.1 fuel filter

a DO NOT install fuel filter at an opposite direction, otherwise a new one should be

installed (even it has been used for a short time). There is an arrow marked on fuel filter

house showing fuel direction.

b Fuel filter should be replaced every 20000-30000km. After replacement, start engine

and check if there exists fuel leakage.

2.2.2 fuel injector

If vehicle is not used for a long time, run engine for 3-5 minutes every 2-3 months to

avoid fuel injector being blocked.

Fuel injector must be washed at least one time once a year.

Fuel injector specifications:

Coil resistance: 13.7±0.68Ω

Coil induction: 19.6±1.9Mh

2.2.3 fuel pressure regulator

Fuel pressure regulator is used to maintain fuel pressure to fuel injector within specification.

Remaining fuel is returned to fuel tank through fuel return pipe.

1 Connecting to vacuum connector

2 Connecting to return pipe, maintaining a constant pressure

to fuel tank.

2.2.4 Fuel pump

Fuel is pumped to fuel hose by fuel pump and then supplied to fuel injector. Fuel pressure in

fuel pipe is maintained at 3.942±0.049Bar.

Testing Method

Listening：

Once ignition is turned to ON position and engine still off, fuel pump running sound can be

heard for 1 second and then stops. An operational pump can be determined by the sound

when starting engine. If fuel pump does not operate, check fuse, fuel pump relay, pump

voltage circuit and then fuel pump.

Air system

2.3.1 Throttle valve body

1 Idle step motor

2 Throttle position sensor

Throttle valve

Joint-connecting to water outlet elbow

Joint-throttle valve water outlet

Preheating water hose outlet pipe.

2.3.1.1 The throttle position sensor

The throttle position sensor is composed of a potentiometer，and the moving part is driven

by throttle shaft. During traveling, electric controller ECU supply voltage to sensor the

measured parameter is the variable generated by minimum throttle opening.

2.3.1.2 idle controller

This system utilizes step motor actuator. Because this actuator controls a comparatively

much air, the air valve could be cancelled, and can carry out idle control during warming

up.

Electronic Specification

ITEM CONDITION

IDEL

GOAL

Coil resistance

Temp: 27

48±2.4Ω

Coil induction

1kHz sine wave input

38±6mH

.

●Testing method

a Ohmmeter

Method

Remove step motor connector, measure resistance between 1A~1B and 2A~2B. Remove

ECU connector, measure resistance between A71~A8 and A5~A6.

b Hand Sensing Method

When ignition switch is turned on, short-time vibration should be felt.

2.3.2 Air Intake Temperature (AIT) Pressure Sensor

AIT pressure sensor has 4 leads, votage supply wire (pin B22), pressure signal (pin B19),

temperature signal (pin B18), and ground wire (pin B23).

Steps

Air intake

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TMAP Resistance-Temperature Specification

Temperature(℃)

R Specified

R Min..(Ω)

R Max. (Ω)

-40

49932.9 43142.0 56723.7

-30

26628.4 23406.3 17396.9

-20

15701.2 14005.4 17396.9

-10 9538.8

8623.1

10454.5

0

5958.7 5452.2 6465.2

10

3820.2 3537.5 4102.9

20

2509.3 2346.2 2672.4

5

2051.3 1928.2 2174.4

30

1686.0 1584.9 1787.1

40 1157.1

1088.8

1225.4

50

810.0 763.0 857.0

60

577.6 548.7 606.5

70

419.1 395.6 442.6

80

309.0 292.0 326.0

90

231.4 218.7 244.1

100

175.7 166.2 185.2

110

135.2 127.0 143.3

120 105.4

98.6

112.2

130 83.1 77.3 88.9

●Testing method:

a Ohmmeter method

Using ohmmeter measure resistance. Determine if ECU sensor operates by abve engine air

intake temperate-resistance chart. Remove air intake temperature sensor, and heat sensor in

water (refer to diagram 4.3). Sensor has a corresponding resistance with different

temperature.

b Voltmeter method

Install sensor on engine, start engine. Connect voltmeter to sensor signal lead. For different

air intake temperate, voltmeter has a corresponding voltage drop. Voltage decrease as

temperature increase.

2.3.3 air intake manifold

2.3.3.1 air intake manifold upper body

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