Chery SQR 7160 sedan. Manual - part 119

 

Remove TPS connector. Depress throttle slowly and monitor resistance. Measuring 

resistance at wide open throttle (WOT), resistance is 5KΩ±20% at WOT. Verify resistance 

change smoothly when throttle closed. 

 

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 

 Vo

lu

m

e 

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