No

Step 7

Check whether the cooling fan is working properly.

Yes

Check the cooling fan circuit. Refer to

2.8.7.2

 

Cooling Fan Circuit Diagnosis

No

Step 8

Check whether there is water pump fault.

Yes

Replace the water pump. Refer to

2.8.8.6

 

Water Pump Replacement

No

Step 9

Check whether radiator cap is faulty.

Yes

Replace the faulty radiator cap.

No

Step 10

Check whether there is cylinder head cover and engine block cracking or blockage. Is cylinder block gasket
sealing poor

Yes

Repair the damaged cylinder head cover and
engine block

No

Step 11

Confirme that the fault has been fixed.

2.8.7.9 Engine Does Not Reach Normal Operating Temperature

Step 1

Check whether coolant recovery reservoir coolant level is abnormal?

Yes

Add engine coolant to specified level.

No

Step 2

Check the cooling system temperature.

(a)

Turn the ignition switch to "OFF" position.

(b)

Connect the scan tool to a datalink connector.

(c)

Turn the ignition switch to "ON" position.

(d)

Select in sequence: Engine / Data List / Engine Coolant
Temperature.

(e)

Maintain the engine speed at 2,000 rpm and observe the data
flow for the engine coolant temperature.

Does the engine coolant temperature increase?

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Cooling System JL4G18-D

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Yes

Instrument cluster is faulty. Refer
to

11.7.6

 

Diagnostic Information and

Procedures

No

Step 3

Check whether the cooling fan rotates normally?

Yes

Refer to 

2.8.7.5

 

Cooling Fan Always Runs At

Low Speed

No

Step 4

Check whether the thermostat is working as per normal?

(a)

Check whether the installed thermostat type is correct.

(b)

Check whether the thermostat is stuck at the open position.

Yes

Replace with the correct type of thermostat.

No

Step 5

Check whether engine coolant pipes are blocked.

Yes

Flush the cooling system or check the radiator
flow.

No

Step 6

Road test vehicle. Confirm the fault has been fixed.

2.8.7.10 Excessive Engine Coolant Loss

Step 1

Check whether the radiator is leaking?

Yes

Replace the damaged radiator. Refer to

2.8.8.5

 

Radiator Replacement

No

Step 2

Check for leaking at the following locations: A, Coolant Recovery Reservoir. B, Coolant Pipes.

Yes

If necessary, replace the following
components: Coolant Recovery Reservoir,
Plumbing.

No

Step 3

Check whether the radiator pipes and joints are loose or damaged?

Yes

Reinstall the coolant pipes or the clamp.

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No

Step 4

Check whether the water pump seal is leaking.

Yes

Replace the Pump Seal.

No

Step 5

Check whether the cylinder head cover torque is appropriate.

Yes

Tighten the cylinder head gasket bolts to the
specified torque. If necessary, replace the
cylinder head gasket

No

Step 6

Check for leaking at the follows locations:

(a)

Intake Manifold

(b)

Cylinder Head Gasket

(c)

Cylinder Block Bolt

(d)

Heater Core

(e)

Radiator Discharge Plug

Yes

When necessary, repair or replace parts to
eliminate leakage faults.

No

Step 7

Confirm that the fault has been fixed.

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2.8.8 Removal and Installation
2.8.8.1 Engine Coolant Discharge and Filling

Warning!

Refer to "Cooling System Service Warning" in "Warnings
and Notices".

FE02-0318b

1.

Place a recycling container under the vehicle to contain
the discharged engine coolant.

2.

Remove the radiator cap.

FE02-0319b

3.

Remove the engine coolant drainage valve.

MAX

MIN

FE02-0320b

4.

Contain the discharged engine coolant with the container.

Note

Handle the recycled old engine coolant, waiting for
scrap  or  recycling.  Do  not  dispose  the  old  engine
coolant  into  the  water  sewage  to  protect  the
environment.

5.

Install the engine coolant drainage valve.

6.

Clean  the  Coolant  Recovery  Reservoir.  Refer  to

2.8.8.2

 

Coolant Recovery Reservoir Replacement

.

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