Geely Emgrand X7. Manual part — 184

Step 5

Replace ECM. Refer to 2.12.8.1 Replacement of Engine Control Module.

Step 6

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

Step 7

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) test the vehicle on the road for at least 10 min.

(f) Read control system DTC code again. Verify that the system has no DTC code output.

Step 8

Troubleshooting

5. Maintenance

guide

:

Refer to 2.12.8.5 Replacement of VVT Solenoid Valve and Filter Cleaning to replace the VVT
solenoid valve.

No

Repair or replace harness connector

Yes

Next

Next

735

2.12.7.18 P0107 P0108

1. DTC

description:

DTC P0107 Manifold air pressure sensor circuit has low voltage or is open

DTC P0108 Intake Air Pressure Sensor Circuit High Voltage

Intake Air Manifold Absolute Pressure (MAP) Sensor responds to the pressure changes within the
intake manifold. Pressure varies according to engine load. The MAP sensor circuit consists of the
following:

• 5V

reference

voltage

•

Low Reference Voltage Circuit

• Sensor

Signal

Circuit

ECM provides sensor harness connector EN16 terminal No.1 5 V reference voltage through
ECM harness connector EN01 terminal No.66. And, a low reference voltage through EN01
terminal No.76 to EN16 terminal No.4. The sensor provides a signal through EN16terminal No.2
to ECM harness connector EN01 terminal No.54. This signal is related to the intake manifold
pressure change. When the intake manifold absolute pressure is low, such as at idle or during
deceleration, ECM detected signal voltage is low. When the intake manifold absolute pressure is
high, such as the ignition switch turned on with the engine is turned off, or when the throttle is
fully open, ECM detected signal voltage is high. Sensors are also used to determine the
atmospheric pressure. When the ignition switch is turned on and the engine is turned off. As long
as the engine running with the throttle fully open, atmospheric pressure readings will also be
updated. ECM monitors sensor signals in order to determine whether the voltage is beyond the
normal range.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0107

Circuit Inspection, Over
the Minimum Limit

1. Idle

2. When the sensor circuit is

open or short to ground, the
sensor signal voltage is 0

P0108

Circuit Inspection,over
the Maximum Limit

1. Idle

2. When the sensor circuit short

to power supply or a 5 V
reference voltage

3. Sensor A/D initial signal is

99.6%

1. Sensor

Circuit

2. Sensor

3. ECM.

736

3. Circuit

sketch

NL02-2038b

进气温度
压力传感器

3

EN16

4

EN16

1

EN16

2

EN16

71

EN01

76

EN01

54

EN01

66

EN01

MAT

MAP

V5REF2

V5RTN2

ECM

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.

Step 1

Initial Inspection

Inspect if there are the following conditions:

(a) Sensor housing damage, vacuum tubes broken.

(b) Sensor

seal

damage.

(c) Sensor loose or improperly installed.

(d) Sensor tube blockage.

It is not allowed to connect 5 V reference voltage circuit of intake manifold absolute pressure
sensor and other components of the vehicle, as this will damage the sensors and ECM.

Step 2

Measure intake manifold absolute pressure sensor 5 V reference voltage.

Next

Air
intaketemperature
pressure sensor

737

(a) Rotated ignition switch to OFF

position .

(b) Disconnect intake manifold

absolute pressure sensor wiring
harness connector EN16.

(c) Rotated ignition switch to ON

position .

(d) Measure voltage between intake

manifold absolute pressure sensor
wiring harness connector EN16
terminal No.2 and a reliable
ground.

Standard voltage: 4.5V-5.5V

NL02-2039b

4

3

2

1

EN16 进气温度压力传感器线束连接器

2

(e) Connect

intake

manifold

absolute pressure sensor wiring harness connector EN16.

Is voltage the specified value?

Step 3

Measure Sensor Signal Circuit

(a) Rotated ignition switch to OFF

position .

(b) Disconnect intake manifold

absolute pressure sensor wiring
harness connector EN16.

(c) Rotated ignition switch to "ON"

position .

(d) Connect a 5A fuse cross-wiring

between EN16 terminals No. 1
and No.2. With a fault diagnosis
tester, observe "Actual Intake
Manifold Absolute Pressure
Sensor Voltage" parameter.

standard value: 4.5V-5.5V

(e) Connect intake manifold absolute

pressure sensor wiring harness
connector EN16.

NL02-2040b

4

3

2

1

EN16 进气温度压力传感器线束连接器

2

1

Is data normal?

Step 4

Measure intake manifold absolute pressure sensor ground circuit.

No

Go to step 7

Yes

No

Repair or replace harness connector

Yes

EN16 air intaketemperature pressure

sensor harness connector

EN16 air intaketemperature pressure

sensor harness connector

738