Chery S11 / Chery QQ. Manual - part 207

 Chery  QQ  Maintenance Manual                     372 EFI System

 

(6)  Fault read out 
The malfunction information records can be read out from ECU by tester, or be read by 
flashing DTC codes. If the faults relate the function of fuel/air mix ratio regulator, engine will   
 
read malfunction information records after running at least 5 minutes. 
 



 

Fig. 3 ISO 9141-2    Standard diagnosis connector 

The diagnosis connector install under glove box of sub cab 

 

(7) Clear 

DTC 

When eliminate the faults, DTC should be cleared. There are 5 methods:   
Clear DTC by using tester with the order of “clear DTC”. 
Remove ECU terminals or battery terminals to clear DTC outside of RAM.   
 
(8) Finding 

faults 

Getting above DTC means only to know the faults position, but not the real fault because the 
reason for one fault may be the electric or mechanical one such as sensor, ECU or actuator 
damage, or open circuit or short circuit or even mechanical damage. 
 
Fault is internal, but the appearances are various. Firstly use tester or flashing light to check if 
existing any DTC, and troubleshoot the faults accord to DTC, then find the reason of fault 
according to engine symptom. 
 
The step of fault diagnosis according to fault information record 
DTC                          13              A/C evaporator outlet temperature sensor 
 
 
 
 
 
 
 
 
 

 

 

 Chery  QQ  Maintenance Manual                     372 EFI System

 

 

 

 
                                           
                                    The diagram for A/C evaporator temperature sensor 
 

No. Operation 

steps 

Test 

results 

Next step 

1 

Turn on ignition key. 

 

Next 

Yes Next 

2 

Pull out connector of A/C evaporator 

temperature sensor, measure if the volt 

between 2 pins is 5V with multimeter.   

 

No 4 

Yes Replace 

sensor 

3 

Check any open or short between 2 pins 

with multimeter. 

 

No Replace 

ECU 

Yes 

Repair or replace 

harness 

4 

ECU and harness, check any open or short 

between pin 30 , 39 of ECU and pin (1) and 

(2) of sensor with multimeter. 

No Replace 

ECU 

 
 
 
 
 
 
 

 

 

 Chery  QQ  Maintenance Manual                     372 EFI System

 

DTC 14  TPS 

 

 

 
 
 
 
 

                                                  The diagram of TPS 
 

No. Operation 

steps 

Test 

results 

Next step 

1 

Turn on ignition key. 

 

Next 

Yes Next 

2 

Pull out connector of A/C evaporator 
temperature sensor, measure if the volt 
between 2 pins is 5V with multimeter.   

 

No 

5 

Yes Next 

3 

Measure the resistance between pin (1) 
and (2) if in 1.6 to 2.4k with multimeter. 
 

No Replace 

sensor 

Yes Replace 

sensor 

4 

Run slowly TPS from one end to another 
and check any open or short between pin 
(1) and (3). 

No Replace 

ECU 

Yes Repair 

or 

replace harness 

5 

Connect adaptor between ECU and 
harness, check any open or short between 
pin 12 , 30 of ECU and pin (1) and (2) of 
sensor with multimeter. 
 

No Replace 

ECU 

KS 
 
 

 

 

 Chery  QQ  Maintenance Manual                     372 EFI System

 

                                       

爆震传感器

   

 

Diagram for KS 

 
 

No. Operation 

steps 

Test 

results 

Next step   

1 

Turn off ignition key, engine nor run. 

 

Next 

Yes Next 

2 

Pull out connector of KS sensor, measure if 

the resistance between pin 1, pin 2 of sensor   

is over 1M with multimeter. 

No Replace 

sensor 

Yes Next 

3 

Slightly knock around sensor with small 

hammer and check if any AC signals putout 

between pin1 and pin2 of sensor. 

No  

Replace sensor 

4 

Turn on ignition key but engine not run 

 

Next 

 

Yes 

Repair or replace 

harness 

 

Connect adaptor between ECU anfd harness 

and check any open or short between pin 

11, pin 30, pin19 of ECU and pin 1 and pin2 

and pin 3 with multimeter. 

No 

更换

ECU 

Replace ECU