1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF01

EF21

EF18

EF25

EF20

EF29

EF06

EF02

EF30

EF17

EF19

EF23

EF22

EF26

EF24

EF08

EF27

EF28

EF05

EF07

EF16

EF04

EF03

EF15

EF12

EF10

EF1

1

EF09

EF13

EF14

EF32

EF31

A

86

87

30

85

1

2

3

Cooling Fan Harness Connector CA16

FE02-7804b

(a)

Turn the ignition switch to "OFF" position.

(b)

Remove the High-Speed cooling fan relay.

(c)

Disconnect cooling fan wiring harness connector CA16.

(d)

Test continuity between high speed cooling fan relay A
terminal No.30 and cooling fan wiring harness connector
CA16 terminal No.2.

(e)

Measure resistance between high speed cooling fan relay A
terminal No.30 and a reliable ground. check whether the
circuit is short to ground.

Standard Value:

Test Items

Specified Value

Resistance Between Relay A (30) and
CA16 (2)

Less than 1 Ω

Resistance Between Relay A (30) and
A Reliable Ground

10 kΩ or higher

Are measured values specified values?

No

Circuit between cooling fan relay terminal No.
30 and wiring harness connector CA16
terminal No.2 is faulty. check and Repair the
faulty part.

Yes

Step 7

Replace high speed cooling fan relay A. Confirm whether the fault has been fixed.

Step 8

Check high speed relay A coil power supply.

1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF01

EF21

EF18

EF25

EF20

EF29

EF06

EF02

EF30

EF17

EF19

EF23

EF22

EF26

EF24

EF08

EF27

EF28

EF05

EF07

EF16

EF04

EF03

EF15

EF12

EF10

EF1

1

EF09

EF13

EF14

EF32

EF31

A

86

87

30

85

FE02-7805b

(a)

Turn the ignition switch to "OFF" position.

(b)

Remove the High-Speed cooling fan relay A.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between high speed cooling fan relay A
terminal No.85 and a reliable ground.

Standard Voltage: 11-14 V

Is the voltage specified value?

No

Circuit between relay terminal No.85 and
main relay terminal No.3 is open.

Yes

Step 9

Check high speed relay A control circuit.

Engine

Engine Cooling System JL4G15-D

2-843

1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF14

EF24

EF28

EF27

EF26

EF18

EF07

EF06

EF30

EF19

EF20

EF21

EF22

EF23

EF25

EF15

EF16

EF17

EF13

EF12

EF1

1

EF10

EF09

EF08

EF05

EF04

EF03

EF02

EF01

A

86

87

30

85

1

17

33

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

ECM Harness Connector EO35

FE02-7902b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect ECM harness connector EO35.

(c)

Remove the High-Speed cooling fan relay A.

(d)

Test continuity between high speed cooling fan relay A
terminal No.86 and EO35 terminal No.66.

(e)

Measure voltage between high speed cooling fan relay A
terminal No.86 and a reliable ground.

Standard Value:

Test Items

Specified Value

Resistance Between Relay A (86) and
EO35 (66)

Less than 1 Ω

Resistance Between Relay A (86) and
A Reliable Ground

0 V

Are measured values specified values?

No

Circuit between Relay A terminal No.86 and
EO35 terminal No.66 is open. inspect and
repair the relevant parts.

Yes

Step 10

Check ECM working circuit.

(a)

Check whether ECM power supply circuit is normal.

(b)

Check whether ECM ground circuit is normal.

No

Repair the faulty part.

Yes

Step 11

Replace ECM.

(a)

Carry out crankshaft self learn after ECM replacement. Refer
to 

2.12.7.11

 

Crankshaft Position Sensor (CKP) Learn

.

Next

Step 12

Diagnostic completed.

2.18.3.3 Low Speed Cooling Fan Inoperative

Note

Before carry out this diagnostic procedure, please Refer to the2.18.3.1

 

Cooling Fan Circuit Diagnosisprogram, which

will help with quick diagnostic.

Step 1

check low speed cooling fan power supply.

2-844

Engine Cooling System JL4G15-D

Engine

1

2

3

Cooling Fan Harness Connector CA16

FE02-7807b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect cooling fan wiring harness connector CA16.

(c)

Turn the ignition switch to "ON" position.

(d)

Connect scan tool to the datalink connector.

(e)

Select in sequence: Engine / Action Test / fan 1.

(f)

Make low-speed relay work.

(g)

Measure voltage between cooling fan wiring harness
connector CA16 terminal No.1 and a reliable ground.

Standard Voltage: 11-14 V

Is the voltage specified Value?

No

Go to step 4

Yes

Step 2

Check the cooling fan ground circuit.

1

2

3

Cooling Fan Harness Connector CA16

FE02-7802b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect cooling fan wiring harness connector CA16.

(c)

Measure resistance between cooling fan wiring harness
connector CA16 terminal No.3 and a reliable ground.

Standard Resistance: Less than 1 Ω

Is the resistance specified Value?

No

CA16 terminal No.3 has poor connection to
ground. Inspect and repair faulty part.

Yes

Step 3

Replace cooling fan assembly.

Step 4

Use scan tool "Action Test" to drive the fan 1. Does low speed relay work?

No

Go to step 8

Yes

Step 5

Check low speed relay B terminal No.87 power supply.

Engine

Engine Cooling System JL4G15-D

2-845

1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF01

EF21

EF18

EF25

EF20

EF29

EF06

EF02

EF30

EF17

EF19

EF23

EF22

EF26

EF24

EF08

EF27

EF28

EF05

EF07

EF16

EF04

EF03

EF15

EF12

EF10

EF1

1

EF09

EF13

EF14

EF32

EF31

B

86

87

30

85

FE02-7808b

(a)

Turn the ignition switch to "OFF" position.

(b)

Remove the low-speed cooling fan relay B.

(c)

Measure voltage between low speed cooling fan relay B
terminal No.87 and a reliable ground.

Standard Voltage: 11-14 V

Is the voltage specified Value?

No

Relay B terminal No.87 power supply circuit
malfunction. Inspect and repair faulty parts.

Yes

Step 6

Check low speed cooling fan relay and cooling fan harness connector CA16 wiring harnesses.

1413 12 1110

5

1

2

3

4

6

7

8

9

J

L

K

I

G

D

C

B

E

F

A

86

86

30

87

85

86

86

87

87

87

30

30

30

85

85

85

2

2

3

3

5

5

1

1

1

2

5 3

1

2

5 3

86

87

30

1

1

2

5
3

2

5
3

85

EF01

EF21

EF18

EF25

EF20

EF29

EF06

EF02

EF30

EF17

EF19

EF23

EF22

EF26

EF24

EF08

EF27

EF28

EF05

EF07

EF16

EF04

EF03

EF15

EF12

EF10

EF1

1

EF09

EF13

EF14

EF32

EF31

1

2

3

B

86

87

30

85

Cooling Fan Harness Connector CA16

FE02-7809b

(a)

Turn the ignition switch to "OFF" position.

(b)

Remove the low-speed cooling fan relay.

(c)

Disconnect cooling fan wiring harness connector CA16.

(d)

Test continuity between low speed cooling fan relay B
terminal No.30 and cooling fan wiring harness connector
CA16 terminal No.1.

(e)

Measure resistance between low speed cooling fan relay B
terminal No.30 and a reliable ground. check whether the
circuit is short to ground.

Standard Value:

Test Items

Specified Value

Resistance Between Relay B (30) and
CA16 (1)

Less than 1 Ω

Resistance Between Relay B (30) and
A Reliable Ground

10 kΩ or higher

Are measured values specified values?

No

Circuit between cooling fan relay terminal No.
30 and wiring harness connector CA16
terminal No.1 is faulty. Check and repair the
faulty part.

Yes

Step 7

Replace cooling fan Low speed relay B. Confirm whether the fault has been fixed.

Step 8

Check low speed relay B coil power supply.

2-846

Engine Cooling System JL4G15-D

Engine