Chery QQ6 (S21) / S12LHD. Manual — part 210

11.12 Ignition Coil Failure

No.

Operating steps

Result

Follow up steps

1

Put the ignition switch to “ON”.

Next step

Yes

Next step

2

Pull out ignition coil joint on harness, and then use

a multimeter to check if the voltage between 3#

pin of this joint and ground wire is an around 12V

battery voltage.

No

Check the circuit

Yes

Check circuit and

ECU

3

Pull out ignition coil joint on harness, and then use

a multimeter to check if it is short or break circuit

between 1# pin of this joint and 5# pin of ECU.

No

Next step

Yes

Check circuit and

ECU

4

Pull out ignition coil joint on harness, and then use

a multimeter to check if it is short or break circuit

between 2# pin of this joint and 2# pin of ECU.

No

Next step

Yes

Next step

5

Check if the resistance of primary coil of the

sensor is around 0.9Ω.

No

Replace the ignition

coil

Yes

Next step

6

Check if the resistance of secondary coil of the

sensor is around 14.5kΩ.

No

Replace the ignition

coil

Yes

Check other part

7

Use an oscillometer to check if secondary ignition

waveform of ignition cable of ignition system is

normal.

No

Replace the ignition

coil

Note: The ignition coil is mainly used to provide ignition system of engine with ignition energy. The

failure rate of the coil itself is very low, but its failure probability can not be completely excluded. When

failure occurs in ignition coil, the ignition energy of engine will be deficient, which may further lead to

such failures as unsteady idle speed of engine and emission deterioration.

11.13 Accelerator Pedal Position Sensor Failure

Failure codes: P2106, P2122, P2123, P2127, P2128, P2138

No.

Operating steps

Result

Follow up steps

1

Put the ignition switch to “ON”.

Next step

Yes

Next step

2

Pull out accelerator pedal position sensor joint on

harness, and then use a multimeter to check if an

around 5V voltage signal is present between 3#,

6# pins of this joint and ground wire.

No

Check the circuit

Yes

Check the circuit

3

Pull out accelerator pedal position sensor joint on

harness, and then use a multimeter to check if it is

short or break circuit between 3#, 6# pins of this

joint and 32#, 33# pins of ECU.

No

Next step

Yes

Check the circuit

4

Pull out accelerator pedal position sensor joint on

harness, and then use a multimeter to check if it is

short or break circuit between 2#, 5# pins of this

joint and 36#, 35# pins of ECU.

No

Next step

Yes

Check the circuit

5

Pull out accelerator pedal position sensor joint on

harness, and then use a multimeter to check if it is

short or break circuit between 4#, 1# pins of this

joint and 16#, 40# pins of ECU.

No

Next step

Yes

Next step

6

Use a diagnostic tester to read signal output of

accelerator pedal position sensor, and then check

if signal 1 increases as opening of accelerator

pedal increases.

No

Replace the sensor

assembly

Yes

Check other part

7

Use a diagnostic tester to read signal output of

accelerator pedal position sensor, and then check

if signal 2 increases as opening of accelerator

pedal increases.

No

Replace the sensor

assembly

Note: This pedal is an integrated circuit device, which can not be processed through repair; therefore,

during maintenance process, the service station can maintain it by means of part replacement and can not

disassemble the sensor.

11.14 Double Brake Switch

Failure codes: P0571, P0504

No.

Operating steps

Result

Follow up steps

1

Put the ignition switch to “ON”.

Next step

Yes

Next step

2

Pull out brake switch joint on harness, and then

use a multimeter to check if it is short or break

circuit between 1#, 2# pins of this joint and 21#,

58# pins of ECU.

No

Check the circuit

Yes

Next step

3

Close the ignition switch, and then check if an

around 12V battery voltage is present on 3# pin of

the switch joint.

No

Check the circuit

Yes

Next step

4

Open the ignition switch, and then check if an

around 12V battery voltage is present on 4# pin of

the switch joint.

No

Check the circuit

Yes

Next step

5

Release brake pedal, disconnect sensor connector,

and then check if 1# and 3# pins cut off.

No

Replace the brake

switch

Yes

Next step

6

Release brake pedal, disconnect sensor connector,

and then check if 2# and 3# pins conducts.

No

Replace the brake

switch

Yes

Next step

7

Apply brake pedal, disconnect sensor connector,

and then check if 1# and 3# pins conducts.

No

Replace the brake

switch

Yes

Check other part

8

Apply brake pedal, disconnect sensor connector,

and then check if 2# and 4# pins cut off.

No

Replace the brake

switch

11.15 Theft-proof Control System Failure

No.

Operating steps

Result

Follow up steps

1

Insert the ignition key into the ignition lock.

Next step

Yes

Check other part

2

Put the ignition switch to ON position, and then

observe if engine failure indicator lamp or EPC

lamp works normally (quick flash of failure

indicator lamp or EPC lamp indicates a abnormal

condition).

No

Next step

Yes

Remove the failure

and clear the DTC

3

Connect a diagnostic tester to the system, and then

enter corresponding diagnostic program unit to

check if DTC exists in the system.

No

Next step

Yes

Next step

4

Pull out theft-proof module joint on harness, and

then use a multimeter to check if an around 12V

operating voltage is present on A1#, A4# pins of

the joint when ignition switch is under ON state.

No

Check the circuit

Yes

Check the circuit

5

Pull out theft-proof module joint on harness, and

then use a multimeter to check if such electric and

circuit failures as short circuit and break circuit

exist in the circuit between A5#, A8# pins of this

joint and 31# and 71# pins of ECU.

No

Next step

Yes

Check the circuit

6

Pull out theft-proof module joint on harness, and

then use a multimeter to check if poor contact

exists between A2# pin of this joint and ground

wire of the vehicle.

No

Next step

Yes

Check the circuit

7

Pull out theft-proof module joint on harness, and

then use Ohm Shift of the multimeter to check if

the circuit between B1#, B2#, B3# pins of this

joint and the coil exists.

No

Replace

the

theft-proof module