Geely Emgrand X7. Manual part — 87

2.3.7 Diagnostic Procedures and Description

2.3.7.1 Diagnosis descriptions

Refer to 2.3.2 Description and Operation, get familiar with the system functions and operation
before starting system diagnosis, so that it will help to determine the correct diagnostic steps, more
importantly, it will also help to determine whether the situation described by the customer is
normal.

2.3.7.2 Visual inspection

z Inspect installed after market equipment that may affect the operation of the fuel system.

z Inspect the easy to access system components to identify whether there is significant damage

or the existence of an external leakage.

z Inspect whether the fuel is the recommended type and fill up the fuel tank.

2.3.7.3 Fuel Pressure Testing Procedure

Warning: Gasoline and gasoline vapor is highly flammable. In order to avoid fire or
explosion, please select to keep away from a fire. It is prohibited to use mobile phones during
this procedure. Do not use open containers to store gasoline or exhaust emissions. Before
carrying out this procedure, please prepare a dry-chemical fire extinguisher.

Warning: Wrap a cloth around the fuel pressure gage and fuel distributing pipe joints to
absorb leaked fuel when you connect the fuel pressure gage to reduce the risk of fire and
injury. Upon completion of testing, place the cloth into the designated containers. Clean the
oil pipe connector before dismantling the oil pipe.

Warning: It is prohibited to pour or store fuel in an open container, otherwise it will cause a
fire.

1

Install fuel pressure gage in the fuel distributing pipe inlet.

2

Place the fuel pressure gage exhaust hose into a specified gasoline container.

3

Open the valve on the fuel pressure gage to discharge the air from the gage.

4

Turn the ignition switch to the position "ON".

5

Use fault diagnosis tester "Function Test" drive fuel pump fuel pump relay, until all
the air expelled from pressure gage.

6

Turn off the exhaust valve on the fuel pressure gage.

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7

Use fault diagnosis tester to connect the fuel pump to inspect whether there is fuel
leakage and the leakage location.

8

When there is no leakage in the pipeline, start the engine and the fuel pressure should
be 400 kPa (58.01psi).

9

Turn the ignition switch to "OFF" position.i under normal circumstances the system
should maintain residual pressure above 250 kPa (36.26 psi). If the fuel pressure
continues to drop, inspect the fuel pump or fuel pressure regulator.

10 Finish

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2.3.8 Removal and installation

2.3.8.1 Fuel Pressure Release Procedure

1. Open the fuel tank cap.

2. Open the hood, pull out fuel

pump fuse EF25 (15 A).

3. Start the engine until the engine

stops running automatically.

4. Start the engine again, so that the

crankshaft continues to rotate
about 10s.

Note: If you want to dismantle any
fuel system components, wrap pipe
joints with plastic bags to prevent fuel
leakage and prevent the entry of
foreign matter.

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2.3.8.2 Replacement of Fuel Filter

Dismantlement Procedure

Warning: Refer to "Warning on Release Fuel Pressure" in "Warnings and Precautions".

1. Release fuel pressure. Refer to

2.3.6.1 Fuel Pressure Release
Procedure.

2. Disconnect the battery negative

cable. Refer to 2.12.6.1 Battery
Cable Disconnection/Connection
Procedures.

3. Lifting and Jacking the Vehicle

Warning: Refer to "Warning on
Vehicle Lifting and Jacking" in
"Warnings and Precautions".

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4. Disconnect the fuel inlet and outlet pipes.

5. Dismantle the fixing bolts of fuel filter bracket.

Note: If sand enters into the pipe joints, removal may become difficult. With a wood handle
gently knock the filter housing to remove the sand, and then push the pipe toward the filter
direction. Press the lock to disconnect the pipe. After that, pull the quick coupling out of the fuel
filter joint at the direction shown in the figure.

Installation Procedure:

1. Install the fuel filter to the

bracket and tighten the fixing
bolts. Pay attention to the
direction of the filter.

Torque: 8 Nm (Metric) 6 lb-ft (English
system)

2. Connect the fuel inlet and outlet

pipes.

3. Connect the battery negative

cable .

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