Geely Emgrand X7. Manual part — 46

terminal No.1 and a reliable ground. Inspect whether the circuit is short to power supply.
Otherwise, repair the faulty part.

Test Items

Standard Value

EM23(3)-EM01(29) Less

than

1

Ω

Voltage Between EM23 (3) and a Reliable Ground

0V

Execute next step as per normal.

Step 7

Inspect the ECM Power Supply Circuits.

(a) Inspect whether ECM power supply circuit is normal.

(b) Inspect whether ECM ground circuit is normal.

Step 8

Replace ECM

(a) Refer to 2.2.8.1 Replacement of Engine Control Module to Replace ECM.

(b) Carry out the crankshaft position sensor learning, refer to 2.2.7.11 “Crankshaft Position

Sensor (CKP) Learning.

Step 9

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

(a) Connect the fault diagnosis tester to the diagnostic interface.

(b) Turn 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) Read control system DTC code again to confirm that the system has no DTC code exported.

Step 10

Troubleshooting

5. Maintenance

guide

:

Replace the temperature sensor of engine coolant. Refer to 2.2.8.2 Replacement of temperature
sensor of engine coolant.

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

No

Repair the faulty part.

Yes

Next

183

2.2.7.21 DTC P0122 P0123

1. DTC

description:

DTC P0122 Electronic Throttle Position Sensor #1 Circuit Low Voltage

DTC P0123 Electronic Throttle Position Sensor 1 Circuit High Voltage or open

TPS1 sensor sends signal through ECT harness connector EM13 terminal B to ECM through ECM
harness connector EM01 terminal No.52. If the TPS1 sensor signal is lost, but ECM is able to
receive the normal TPS2 sensor signal, then ECM controls the engine to enter reliability of
determining the driver's intention decline or no high power output mode. Engine responds to the
pedal changes slowly and engine power output will be significantly weaker, although the vehicle
can still be able to drive in normal traffic.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0122

Hardware
Circuit
Malfunction

TPS signal end short to ground or
open, the input signal is less than
3.5%, DTC code set.

P0123

Hardware
Circuit
Malfunction

TPS signal end short to power supply,
input signal is greater than 96.5%,
DTC code set.

1. Electronic

Throttle Body

2. Electronic

Throttle Circuit

3. ECM

3. Circuit

sketch

发

动
机

控
制

模

块

电子节气门体

20

EM01 MR-

H

M

21

EM01 MR+

E

52

EM01 TPS1

B

70

EM01 V5REF1

D

27

EM01 TPS2

C

74

EM01 V5RTN1

A

NL02-0038c

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.

Electric throttle body

Engi

ne

co

ntr

ol mo

dul

e

184

Step 1

Inspect for DTC code P0641, P0651, P0222, P0223.

(a) Connect fault diagnosis tester to the vehicle diagnostic interface.

(b) Turn ignition switch to ON position.

(c) Press the fault diagnosis tester power button.

(d) Select the following menu items: Engine/Read DTC codes.

(e) Read DTC codes.

Results

DTC Codes Shown

To Step

Only P0122 and P0123

Yes

With P0222, P0223, P0641, P0651

No

Step 2

Inspect EM13 terminal B.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect ETC harness
connector EM13.

(c)

Disconnect ECM harness
connector EM01.

(d) Measure resistance between

EM13 terminal B and a reliable
ground.

(e) Measure voltage between EM13

terminal B and a reliable ground.

(f) Test continuity between EM13

terminal B and EM01 terminal
No.52.

电子节气门线束连接器 EM28

A

E

B

F

C

G

D

H

NL02-0029c

Results

Test Items

Standard Value

EM13 (B) and a Reliable Ground

10 kΩ or higher

Voltage Between EM13 (B) and a Reliable Ground

0V

EM13 (B) and EM01 (52) Continuity

Less than 1 Ω

Does it conform to the standard value?

No

Refer to2. 12.7.46 DTC P0641
P0651

Yes

Electric throttle harness connectorEM28

185

Step 3

Inspect terminal B voltage output signal.

(a) Connect

ETC

harness connector EM13.

(b) Connect ECM harness connector EM01.

(c) Measure ETC harness connector EM13 terminal B output voltage.

Standard Value: Refer to 2.2.7.12 Electronic Throttle Body (ETC) Inspection.

Is the output voltage value accorded with the standard value?

Step 4

Inspect ECM Power Supply Circuit and ground circuit.

(a) Refer to 2.2.7.43 DTC P0562 P0563 to inspect ECM Power Supply Circuit and ground

circuit.

ECM power and ground circuits normal?

Step 5

Replace ECM

(a) Refer to 2.2.8.1 Replacement of Engine Control Module to Replace ECM.

(b) Carry out the crankshaft position sensor learning, refer to 2.2.7.11 “Crankshaft Position

Sensor (CKP) Learning.

Step 6

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

(a) Connect the fault diagnosis tester to the diagnostic interface.

(b) Turn 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) Read control system DTC code again to confirm that the system has no DTC code exported.

Step 7

Troubleshooting

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

Next

No

Repair power and ground circuits fault.

Yes

No

Refer to Replacement of Electrical Throttle Body
Assembly to replace the Electrical Throttle Body (ETC).

Yes

No

Refer to2. 12.7.46 DTC P0641
P0651

Yes

186