Geely Emgrand X7. Manual part — 219

D. Select the following menu items: Engine/Read DTC codes.

E. Read DTC codes.

DTC Codes Shown

To Step

2.12.7.45 DTC P0601 P0602 P1516 P2101

Yes

DTC codes other than DTC P0601, P0602, P1516 and P2101

No

2

Replace ECM

Refer to 2.12.7.11 “Crankshaft Position Sensor (CKP) Learn” to carry out the crankshaft position
sensor learn after replacing the ECM.

No

Refer to 2. 12.7.14 DTC Chapter Index.

Yes

875

2.12.7.46 DTC P0641 P0651

1. DTC

description:

DTC P0641 ETC Reference Voltage A # Amplitude Fault

DTC P0651 ETC Reference Voltage B # Amplitude Fault

As ETC uses two throttle position sensors, its normal working required 5 V reference voltage and
low reference voltage is shared with ETC harness connector terminals A and D. Where A and
EN01 terminal No.74 is connected as the low reference voltage. Terminal D and EN01 terminal
No.70 is connected as the 5 V reference voltage. Malfunction in any circuit will report DTC code
P0641 or P0651.

2. Conditions For Setting DTC and The Fault Location:

DTC
Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0641

P0651

Hardware Circuit
Malfunction

Internal chip self-diagnosis

1. Electronic

Throttle

Body

2. Electronic

Throttle

Circuit

3. ECM

3. Circuit

sketch

Refer to 2.12.7.21 DTC P0122 P0123

4. Diagnostic

Steps:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and
analyze the accuracy of the data, as these will help with quick diagnosis.

1

Inspect ETC harness connector EN27terminals A and D.

A. rotated ignition switch to OFF

position .

B. Disconnect the harness connector

EN27 of the ETC.

C. Rotated ignition switch to ON

position .

D. Measure resistance between

EM27 terminal A and a reliable
ground.

E. Measure voltage between EM27

terminal D and a reliable ground.

NL02-2138b

D

H

G

F

E

A

B

C

EN27 节气门位置传感器线束连接器

D

A

EN27 throttle position sensor harness

connector

876

Results

Test Items

Standard Value

EN27(A)-reliable grounding resistance value

Less than 3 Ω

EN27(D)-Reliable grounding voltage value

4.8 - 5.2 V

Does it conform to the standard value?

2

Replace the electronic throttle body

Refer to the Replacement of Electronic Throttle Body.

3

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.

4

Inspect ECM Power Supply Circuit and ground circuit.

A. Refer to 2.12.7.43 DTC P0562 P0563 to inspect ECM Power Supply Circuit and ground

circuit.

ECM power and ground circuits normal?

5

Replace ECM. Refer to 2.12.8.6 Replacement of Engine Control Module.

No

Power and ground circuits fault.

Yes

No

Refer to 2.12.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

No

Circuit malfunction, repair circuit.

Yes

877

6

Carry out the crankshaft position sensor learning, refer to 2.12.7.11 “Crankshaft
Position Sensor (CKP) Learning.

Refer to 2.12.7.11 "Crankshaft Position Sensor Learn".

7

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.

8 Troubleshooting

No

Refer to 2.12.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

Next

878