Geely Emgrand X7. Manual part — 77

A. Turn the ignition switch to the

OFF position.

B. Disconnect APP sensor harness

connector IP51.

C.

Disconnect ECM harness
connector EM01.

D. Measure resistance between IP51

terminal No.4 and a reliable
ground.

E. Measure voltage between IP51

terminal No.4 and a reliable
ground.

ECM线束连接器

EM01

1

2

4

5

3

81

63

44

25

6

62

43

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9

8

7

26

42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27

45

46

61 60 59 58 57 56 55 54 53 52 51 50 49 48 47

64

65

66

80 79 78 77 76 75 74 73 72 71 70 69 68 67

NL02-0033c

F. Test continuity between IP51 terminal No.4 and EM01 terminal No.41.

Results

Test Items

Standard Value

Resistance Between IP51 (4) and A Reliable
Ground

10 kΩ or higher

Voltage Between IP51 (4) and A Reliable
Ground

0 V

Continuity Between IP51 (4) and EM01 (41)

Less than 1 Ω

Inspect whether according with the standard value?

4

Inspect APP sensor harness connector IP51terminal No.4 output voltage.

Inspect APP sensor #4 terminal output voltage. Refer to 2.2.7.13 “Acceleration Pedal Position
Sensor (APP) Inspection” for the standard values.

5

Inspect APP sensor harness connector IP51 terminal No.2 and 3.

A. Turn the ignition switch to the OFF position.

B. Disconnect APP sensor harness connector IP51.

C. Disconnect ECM harness connector EM01.

D. Turn the ignition switch to the ON position.

E. Measure resistance between IP51 terminal No.2 and a reliable ground.

No

Refer to 2.2.8.4 “Replacement of
Acceleration Pedal” to replace
the APP sensor.

Yes

Go to step 7

No

Circuit fault, repair the faulty part.

Yes

ECM harness connectorEM01

307

F. Test continuity between IP51 terminal No.2 and EM01 terminal No.70.

G. Measure voltage between IP51 terminal No.3 and a reliable ground.

H. Test continuity between IP51 terminal No.3 and EM01 terminal No.74.

Results

Test Items

Standard Value

Resistance Between IP51 (2) and A Reliable
Ground

Lager than 10 kΩ

IP51(2)- EM01(70)Continuity

Less than 1 Ω

Voltage Between IP51 (3) and A Reliable
Ground

0 V

IP51(3)- EM01(74)Continuity

Less than 1 Ω

Inspect whether according with the standard value?

6

Inspect ECM Power Supply Circuit and Ground Circuit.

Inspect ECM Power Supply Circuit and Ground Circuit, and refer to 2.2.7.43 DTC P0562 P0563.

ECM power and ground circuits normal?

7

Refer to 2.2.8.1 Replacement of Engine Control Module to replace ECM.

8

Refer to 2.2.7.11“Crankshaft Position Sensor (CKP) Learn to carry out the crankshaft
position sensor learn.

9

Use fault diagnosis tester to confirm if DTC is stored again .

A. Connect fault diagnosis tester to the data link connector.

B. Rotated ignition switch to ON position

C. Clear DTC code.

D. Start and run the engine at idle speed to warm up the engine for at least 5 min.

E. Road test the vehicle for at least 10min.

F. Read control system DTC code again to confirm that the system has no DTC code output.

Next

Next

No

Power and ground circuits fault.

Yes

No

Circuit fault, repair the faulty part.

Yes

308

10 Troubleshooting

5. Maintenance

guide

Acceleration pedal position sensor can only be replaced as an assembly. Do not disassemble. Refer
to 2.2.8.4“Replacement of Acceleration Pedal” to replace the acceleration pedal sensor.

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

309

2.2.7.52 DTC P2127 P2128

1. DTC

description:

DTC P2127

Electronic Acceleration Pedal Position Sensor #2 Circuit Low Voltage or Open

DTC P2128

Electronic Acceleration Pedal Position Sensor #2 Circuit High Voltage

In order to protect the security of the system, acceleration pedal position sensor (APP) uses a
dual-sensor setting, sliding resistive. APP sensor 2 output is IP51 terminal No.6, through ECM
wiring harness Connect EM01 terminal No.42 to ECM.

2. Conditions for Setting DTC and the Fault Location:

DTC Code

DTC Detection
Strategy

Set(Control Strategy) Conditions Fault

Locations

P2127

Hardware Circuit
Malfunction

1. APS2 signal terminal grounded

or open.

2. Input signal less than 2.5%

P2128

Hardware Circuit
Malfunction

Voltage is higher than the maximum
limit, or short to power supply

1. Acceleration

Pedal Position
Sensor

2. Acceleration

Pedal Position
Sensor Circuit

3. ECM

3. Circuit

figure

Refer to 2.2.7.51 DTC P2122 P2123.

4. Diagnostic

Steps:

1

Inspect APP sensor harness connector IP51 terminal voltage of the No.1.

A. Turn the ignition switch to the

OFF position.

B. Disconnect APP sensor harness

connector IP51.

C. Turn the ignition switch to the

ON position.

D. Measure voltage between IP51

terminal No.1 and a reliable
ground.

Standard Voltage: 4.8-5.2V

Does it conform to the standard value?

电子油门线束连接器

IP51

6

5

4

3

2

1

NL02-0030c

No

If the voltage is higher than the Standard Value, the circuit
is short to power supply; if the voltage is lower than the
standard value, go to step 5.

Yes

Electronic accelerator harness connectorIP51

310