Geely Emgrand X7. Manual part — 215

E. Measure resistance between the

vehicle speed sensor harness
connector EN21 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 EN21 terminal No.3
and reliable ground with
multimeter. Inspect whether the
circuit is short to power supply.

NL02-2117b

1

2

3

EN21 车速传感器线束连接器

3

Tester Connection

Standard Value

EN21(3)-EN01(51) resistance

Less than 1 Ω

Resistance Between EN21 (3) and Ground

10 kΩ or higher

Voltage Between EN21 (3) and Ground

0V

Are the values specified values?

4

Inspect the vehicle speed sensor ground circuit.

A. rotated ignition switch to OFF

position.

B. Disconnect speed sensor harness

connector EN21.

C. Rotated ignition switch to ON

position .

(d) Measure the resistance between

vehicle speed sensor harness
connector EN21 terminal No.2
and a reliable ground.

Standard Value: Less than 3 Ω

NL02-2120b

1

2

3

EN21 车速传感器线束连接器

2

No

Repair or replace the wire harness
connector to step 8.

Go to step 7

Yes

EN21 speed sensor harness connector

EN21 speed sensor harness connector

859

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 2.12.7.11 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

5. Maintenance

guide

:

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

No

Intermittent fault refers to 2.12.7.3 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

860

2.12.7.42 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 more

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 more

than 60℃(140ºF)

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.

861

Results

DTC Codes Shown

To Step

DTC P0506 P0507

No

DTC code other than P0506 P0507

Yes

2

Inspect whether generator is working properly.

A. Use a fault diagnosis tester to observe whether the system voltage parameters are normal. Is

generator generating capacity normal?

3

Inspect intake air pressure sensor parameters.

A. Use a fault diagnosis tester to observe whether system intake air pressure sensor parameters

are correct. Refer to 2.12.7.9 Data Flow Table. Are intake air pressure sensor parameters
normal?

4

Inspect the working condition of the air-conditioner.

A. Use a fault diagnosis tester to observe whether the air-conditioning working status is

consistent with the actual air-conditioning working condition. Refer to 2.12.7.9 Data Flow
Table.

When the air-conditioning is switched on and the pressure switch voltage is greater than 0 V, does
the idle speed increase by about 150 rpm?

5

Inspect air intake system and exhaust system.

A. Inspect air intake system and exhaust system for blockage and air leakage.

B. Too

much

carbon

residue in throttle.

Yes

Go to step 7

No

No

Repair generator fault.

Yes

No

Repair generator fault.

Yes

Yes

Refer to 2. 3.6.11 DTC Chapter Index.

No

862