Geely Emgrand X7. Manual part — 69

A. Turn the ignition switch to the

OFF position.

B. Disconnect speed sensor wiring

harness connector EM21.

C. Turn the ignition switch to the

ON position.

D. Measure voltage between vehicle

speed sensor harness connector
EM21 terminal No.1 and a
reliable ground.

Standard value :7-9V

车速传感器线束连接器

EM21

1

2

3

NL02-0059c

Is the value specified value?

3

Inspect the vehicle speed signal circuit.

A. Turn the ignition switch to the OFF position.

B. Disconnect speed sensor wiring harness connector EM21.

C. Disconnect ECM harness connector EM01.

D. Measure resistance between the vehicle speed sensor harness connector EM21 terminal No.3

and ECM harness connector EM01 terminal No.51. Inspect whether the circuit is open.

E. Measure resistance between the vehicle speed sensor harness connector EM21 terminal No.3

and a reliable ground. Inspect whether the circuit is short to ground.

F. Measure voltage between the vehicle speed sensor harness connector EM21 terminal No.3

and reliable ground with multimeter. Inspect whether the circuit is short to power supply.

Tester Connection

Standard Value

Resistance Between EM21 (3) and EM01 (51)

Less than 1 Ω

Resistance Between EM21 (3) and Ground

10 kΩ or higher

Voltage Between EM21 (3) and Ground

0V

Are the values specified values?

4

Inspect the vehicle speed sensor ground circuit.

No

Repair or replace the wire
harness connector to step 8.

Go to step 7

Yes

No

Repair the circuit between the vehicle speed sensor
terminal No.1 and the main relay terminal No.3. Go to step
1.

Yes

Speed sensor harness connectorEM21

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A. rotated ignition switch to OFF position .

B. Disconnect speed sensor wiring harness connector EM21.

C. Rotated ignition switch to ON position .

D. Measure the resistance between vehicle speed sensor harness connector EM21 terminal No.2

and a reliable ground.

Standard Value: Less than 3 Ω

Is the value specified value?

5

Replace the vehicle speed sensor.

6

Inspect the ECM Power Supply Circuits.

A. Inspect whether ECM power supply circuit is normal.

B. Inspect whether ECM ground circuit is normal.

7 Replace

ECM

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

sensor learn after replacing the ECM.

8

Use a fault diagnosis tester to confirm whether the DTC Code 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 5min.

E. Read control system DTC code again to confirm that the system has no DTC code exported.

9 Troubleshooting

No

Intermittent fault refers to 2.2.7.3 List of
Intermittent Fault.

Yes

Next

No

Repair the faulty part.

Yes

No

Repair or replace the wire harness
connector to step 7.

Yes

Next

Go to step 8

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5. Maintenance

guide

:

Refer to 3.3.6.2 Replacement of Vehicle Speed Sensor to replace the vehicle speed sensor.

277

2.2.7.42 DTC P0506 P0507

1. DTC

description:

DTC P0506

Idle Speed Too Low

DTC P0507

Idle Speed Too High

Throttle actuator control motor is controlled by the engine control module (ECM). Internal DC
motor drives throttle body. In order to reduce idle speed and adjust the spark and fuel supply,
engine control module commands the throttle to close. By reducing the air flow into the engine,
idle speed is lowered. In order to improve idle, the engine control module commands the throttle
to open, so that more air flows through the throttle.

Engine control module (ECM) calculates and controls engine idle speed based on coolant
temperature, speed compensation, reducing speed, Air-Conditioning compensation and voltage
compensation.

2. Conditions For Setting DTC and The Fault Location:

DTC
Code

DTC Detection
Strategy

Conditions For Setting The DTC (Control
Strategy)

Fault Locations

P0506

Idle speed is
lower than the
target speed by
100 rpm

1. The engine is at idle speed.

2. The vehicle speed is equal to 0.

3. Engine coolant temperature is higher

than 60 (140ºF) .

℃

4. Duration is longer than 10s.

P0507

Idle speed is
higher than the
target speed by
200 rpm

1. The engine is at idle speed.

2. The vehicle speed is equal to 0.

3. Engine coolant temperature is higher

than 60 (140 ºF).

℃

4. Duration Longer Than 10s.

1. ETC

throttle

body
assembly

2. Intake

System

3. Exhaust

System

4. ECM

3. 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 whether there are control system DTC codes other than DTC P0506 P0507.

A. Connect fault diagnosis tester to the vehicle diagnostic interface.

B. Rotated ignition switch to ON position .

C. Press the power button of fault diagnosis tester.

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

E. Read DTC codes.

Results

DTC Codes Shown

To Step

278