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