Chery Tiggo T11 LHD. Manual — part 67

Chery T11 Service Manual Electric Injection System

81

12) The engine speed increases difficultly or the engine shuts down when

acceleration

No.

Operation Step

Detection

Result

Subsequent Step

1

Place the ignition switch on the “ON” position, and apply the

failure diagnosis instrument to examine and confirm whether

there are some failure information records.

Yes

Remove

the

displayed

failure

No

Next step

2

Examine and confirm whether the air cleaner is unobstructed.

Yes

Next step

No

Replace

3

Enable the engine to operate at idle speed, and examine and

confirm whether the speed is normal during idle operation.

Yes

Next step

No

Refer to the idle

failure items to

examine and

repair

4

Enable the engine to operate at idle speed, and examine and

confirm whether the intake pressure is 35 to 55 kPa.

Yes

Next step

No

Examine and

repair

5

Enable the engine to operate at idle speed, and, after the

coolant temperature reaches the normal value, examine and

confirm whether the ignition advance angle is normal.

Yes

Next step

No

Adjust the

ignition advance

angle

6

Connect the fuel pressure gage valve, short circuit the No 30

pin and No 87 pin of the fuel pump relay to enable the fuel

pump to operate, and examine and confirm whether the fuel

pressure is approximate 350 kPa.

Yes

Next step

No

10

7

Apply the special connecting terminal to directly supply the

fuel injector 12 V voltage from the battery, and examine the

normal operation of fuel injector.

Yes

9

No

Next step

8

Rinse the fuel injector, and then reexamine the normal

operation of fuel injector.

Yes

Next step

No

Replace the fuel

injector

9

Examine and confirm whether the fuel deteriorates or contains

water

Yes

Replace fuel

No

15

10

Examine and confirm whether the fuel pressure is below 350

kPa.

Yes

Next step

No

14

11

Shut off the fuel gage valve, turn on the ignition switch again

to enable the fuel pump to operate again, and examine and

confirm whether the fuel pressure can be established.

Yes

Next step

No

13

12

Turn on the fuel gage valve, apply the fuel return immobiliser

to clip the fuel return pipe tightly so as to make it hasn’t fuel

return, and examine and confirm whether it is able to establish

Yes

Replace fuel

pressure

regulator

Chery T11 Service Manual Electric Injection System

82

the fuel pressure quickly.

No

Repair or

replace fuel

injector or fuel

pipe

13

Examine the leakage or jamming of the fuel intake pipe.

Yes

Repair or

replace the fuel

intake pipe

No

Replace fuel

pump

14

Examine the jamming or bending of the fuel return pipe

Yes

Repair or

replace the fuel

return pipe

No

Replace the fuel

pressure

regulator

15

Place the ignition switch on the “ON” position. Connect up an

adaptor between ECU and harness, and examine and confirm

whether the voltages of the output terminal of ECU’s throttle

position sensor, earth terminal, and No 4 and 20 pins (applied

for 4.5 to 5.0V sensor power supply) are normal.

Yes

Next step

No

Repair or

replace harness

16

Examine and confirm whether the ignition coil, high-voltage

wire and sparkle plug operate normally.

Yes

Replace ECU

No

Replace related

parts

Chery T11 Service Manual Electric Injection System

83

13) Slow response when acceleration

Whether the fuel meets the standard requirement and whether there are the intake pressure

sensor and throttle position sensor failures.

No.

Operation Step

Detection

Result

Subsequent

Step

1

Place the ignition switch on the “ON” position, and apply the

failure diagnosis instrument to examine and confirm whether

there are some failure information records.

Yes

Remove

the

displayed

failure

No

Next step

2

Shut down the engine, and examine and confirm whether the

air cleaner is unobstructed.

Yes

Next step

No

Replace

3

Enable the engine to operate at idle speed, and examine and

confirm whether the speed is normal during idle operation

Yes

Next step

No

Refer to the

idle failure

items to

examine and

repair

4

Enable the engine to operate at idle speed, and examine and

confirm whether the intake pressure is 35 to 55 kPa.

Yes

Next step

No

Examine and

repair

5

Place the ignition switch on the “ON” position. Connect up an

adaptor between ECU and harness, and examine and confirm

whether the voltages of the output terminal of ECU’s throttle

position sensor, earth terminal, and No 4 and 20 pins (applied

for 4.5 to 5.0V sensor power supply) are normal.

Yes

Next step

No

Repair or

replace

harness

6

Enable the engine to operate at idle speed, and, after the

coolant temperature reaches the normal value, examine and

confirm whether the ignition advance angle is normal.

Yes

Next step

No

Examine the

others

7

Connect the fuel pressure gage valve, short circuit the No 30

pin and No 87 pin of the fuel pump relay to enable the fuel

pump to operate, and examine and confirm whether the fuel

pressure is approximate 350 kPa.

Yes

Next step

No

11

8

Apply the special connecting terminal to directly supply the

fuel injector 12 V voltage from the battery, and examine the

normal operation of fuel injector.

Yes

10

No

Next step

9

Rinse the fuel injector, and then reexamine the normal

operation of fuel injector.

Yes

Next step

No

Replace the

fuel injector

10

Examine and confirm whether the fuel deteriorates or contains

water

Yes

Replace fuel

No

16

11

Examine and confirm whether the fuel pressure is below 350

kPa.

Yes

Next step

No

15

Chery T11 Service Manual Electric Injection System

84

12

Shut off the fuel gage valve, turn on the ignition switch again

to enable the fuel pump to operate again, and examine and

confirm whether the fuel pressure can be established.

Yes

Next step

No

14

13

Turn on the fuel gage valve, apply the fuel return immobiliser

to clip the fuel return pipe tightly so as to make it hasn’t fuel

return, and examine and confirm whether it is able to establish

the fuel pressure quickly.

Yes

Replace fuel

pressure

regulator

No

Repair or

replace fuel

injector or

fuel pipe

14

Examine the leakage or jamming of the fuel intake pipe.

Yes

Repair or

replace the

fuel intake

pipe

No

Replace fuel

pump

15

Examine the jamming or bending of the fuel return pipe

Yes

Repair or

replace the

fuel return

pipe

No

Replace the

fuel pressure

regulator

16

Examine and confirm whether the exhaust system and

three-way catalytic converter are jammed.

Yes

Replace or

clean

No

Replace ECU