Geely Emgrand X7. Manual part — 40
Geely Emgrand X7. Manual part - 40
A. Remove the cylinder hood cover.
B. Align point D shown in the
graphic. Rotate the crankshaft
pulley, so that the timing mark on
the pulley groove aligns with 0
marked on the timing chain
cover.
C. Inspect points C alignment shown
in the graphic. The camshaft
timing gear timing marks should
be at horizontal positions as
shown in the graphic.
D. Inspect points A,B alignment
shown in the graphic. Make sure
intake, exhaust camshaft gear
timing marks distance between A
and B is 8 timing chain sections.
E. Reinstall the cylinder hood cover.
B
C
D
A
FE02-0143b
Are timing marks shown as in the graph?
6
Replace the VVT actuator assembly.
7
Inspect control system DTC codes.
A. Connect fault diagnosis tester to the vehicle diagnostic interface.
B. Rotated ignition switch to ON position.
C. Select the following menu items:
D. Select the following menu items: Engine/Read DTC codes.
E. Read DTC codes.
Any DTC code?
8
System gets normal and the trouble is removed.
No
Refer to 2.2.7.4 Fault Symptom Table for
intermittent fault.
Yes
Next
No
Adjust the valve timing
Yes
Timing chain cover surface
159
5. Maintenance
guide
:
Intake VVT Actuator can only be replaced as an assembly. Do not disassemble it and repair.
Replacement of VVT actuator and Camshaft.
160
2.2.7.16 DTC P0068 P0106
1. DTC
description:
DTC P0068 Electronic Throttle Air Flow Error
DTC P0106 Intake Pressure/Throttle Position Fault
Intake Manifold Absolute Pressure (MAP) Sensor measures intake manifold pressure changes
caused by the engine load, intake manifold vacuum and engine speed changes, and convert these
changes into voltage output and send to the engine control module (ECM). At the same time the
engine control module (ECM) compares the actual and expected intake manifold absolute pressure
changes based on the throttle position opening change, to determine whether the intake manifold
absolute pressure sensor responds to throttle position opening change or not. Set DTC P0106 fault
accordingly.
Engine control module (ECM) detects air flow based on the intake manifold pressure sensor and
intake air temperature sensors measured data and compare the sir flow with expected air flow
based on throttle position sensor. If the engine control module (ECM) detects that the intake
manifold absolute pressure / temperature sensor detected actual air flow and expected air flow
based on throttle position sensor is inconsistent, it will set DTC P0068.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The
DTC (Control Strategy)
Fault Locations
P0068
Difference between intake
manifold absolute pressure /
temperature sensor detected
air flow and the expected air
flow based on throttle
position is 200 g/s.
1. Engine
Running
2. No Intake Air Pressure /
Temperature Sensor Fault
3. Duration Longer Than 4s.
P0106
Atmosphere correction
pressure value is more than
high limit value.
Or less than low limit value
1. Engine
Running
2. No intake pressure sensor,
coolant temperature
sensor, ETC throttle
position sensor, fuel
injector, ignition coil and
misfire fault, etc.
3. Coolant temperature is
higher than 60°C (140 °F).
4. Duration Longer Than 15s.
1. Intake
Manifold
Pressure /
Temperature
Sensor
2. Intake
Manifold and
Vacuum Tube
3. Throttle
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 Initial
Inspection
Inspect if there are the following conditions:
A. Damaged Intake Manifold Pressure / Temperature Sensor Housing Is, Broken Vacuum Tubes
161
B. Damaged Intake Manifold Pressure / Temperature Sensor Seals
C. Intake Manifold Pressure / Temperature Sensor Loose or Improperly Installed
(d) Throttle seals is damaged, causing air leaks.
2
Inspect whether there is control system DTC code other than DTC P0068 P0106.
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
DTC P0068 P0106
No
DTC Code Other Than DTC P0068 P0106
Yes
3
Inspect the atmospheric pressure parameter in the fault diagnosis data list.
A) Compare the atmospheric pressure parameter and the actual atmospheric pressure, refer to the
"2.2.1.3 Relationship between Altitude and Atmospheric Pressure" in “Engine Control System”.
Are the two similar?
4
Inspect the intake manifold pressure (MAP) sensor value with the engine running.
A. Start
the
engine.
B. When idling, observe the intake manifold pressure (MAP) sensor values.
C. During acceleration, observe the intake manifold pressure (MAP) sensor values.
D. Compare the above intake manifold pressure (MAP) sensor values.
Are above intake manifold pressure (MAP) sensor values changed?
Yes
Go to step 7
No
No
Replace the intake manifold pressure /
temperature sensor.
Yes
Yes
2.2.7.14 DTC Chapter Index
Yes
Next
162
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст