Yes

Step 2

Repair fuse IF26 and IF21 circuits.

(a)

Check the fuse IF26 circuit, repair short-circuit fault.

(b)

Check the fuse IF21 circuit, repair short-circuit fault.

(c)

Replace the fuses.

Can vehicles normally start?

Yes

System normal

No

Step 3

Check engine anti-theft system control module ground.

1

3

5

7

8

6

4

2

Engine Anti-theft Control Unit 1 Harness 

Connector IP25

FE02-6606b

(a)

With a multimeter, measure resistance between continuity
between engine anti-theft system control module terminal
IP25 or IP25 and 6 and body ground to determine the
continuity.

Standard Resistance: Less than 1 Ω.

Is the resistance specified value?

Yes

Go to step 5

No

Step 4

Repair the engine anti-theft system control module ground circuit.

(a)

Repair circuit between the engine anti-theft system control
module connector IP25 terminal No.2 or 6 and body ground
open fault.

Can the vehicle start?

Yes

System normal

No

Step 5

Check EAS coil.

Engine

Engine Anti-theft System JL4G15-D

2-819

Engine Anti-Theft Coil

FE02-6609b

(a)

Disconnect electronic Anti-theft coil harness connector.

(b)

Measure coil resistance with a multimeter.

Standard Resistance: resistance 5 Ω (68 ºF) at room temperature
20°C

Is EAS coil resistance specified value?

Yes

Go to step 7

No

Step 6

Replace electronic Anti-theft coil.

(a)

Replace electronic Anti-theft coil. Refer to "

2.5.8.1

 

EAS Coil

Replacement

."

Can the vehicle start?

Yes

System normal

No

Step 7

Check circuit between EAS coil harness connector and engine anti-theft system control module harness
connector.

1

3

5

7

8

6

4

2

Engine Anti-Theft Control Unit 1 Harness 

Connector IP25

1 2 3 4

Engine Anti-Theft Coil Harness 

Connector IP21

FE02-6607b

(a)

With a multimeter, measure resistance between EAS coil
harness connector IP21 terminal No.1 and engine anti-theft
system control module wiring harness connector IP25
terminal No.1 to determine circuit continuity.

Standard Resistance: Less than 1 Ω

(b)

With a multimeter, measure resistance between EAS coil
harness connector IP21 terminal No.4 and engine anti-theft
system control module wiring harness connector IP25
terminal No.2 to determine circuit continuity.

Standard Resistance: Less than 1 Ω

Is the resistance specified value?

2-820

Engine Anti-theft System JL4G15-D

Engine

Yes

Go to step 9

No

Step 8

Repair circuit between EAS coil harness connector and engine anti-theft system control module harness
connector.

(a)

Check serial communication circuit resistance between
engine anti-theft system control module wiring harness
connector IP25 terminals No.5 and engine control module
wiring harness connector EO01 terminal No.62 to determine
circuit continuity.

(b)

Check serial communication circuit resistance between
engine anti-theft system control module wiring harness
connector IP25 terminals No.8 and engine control module
wiring harness connector EO35 terminal No.72 to determine
circuit continuity.

Can the vehicle start?

Yes

System normal

No

Step 9

Repair serial communication circuit between engine anti-theft system control module and engine control
module.

1

3

5

7

8

6

4

2

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

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

Engine Anti-Theft Unit 1 Harness 
Connector IP25

ECM Harness Connector EO01

ECM Harness Connector EO35

FE02-6701b

(a)

Repair serial communication circuit open between engine
anti-theft system control module wiring harness connector
IP25 terminals No.5 and engine control module wiring
harness connector EO01 terminal No.62.

Standard Resistance: Less than 1 Ω

(b)

Repair serial communication circuit open resistance between
engine anti-theft system control module wiring harness
connector IP25 terminals No.8 and engine control module
wiring harness connector EO35 terminal No.72.

Standard Resistance: Less than 1 Ω

Is the resistance specified value?

Yes

Intermittent Fault. Refer to 

2.2.7.3

 

Intermittent

Fault Check

Engine

Engine Anti-theft System JL4G15-D

2-821

No

Step 10

Repair serial communication circuit between engine anti-theft system control module and engine control
module.

(a)

Repair serial communication circuit open between engine
anti-theft system control module wiring harness connector
IP25 terminals No.5 and engine control module wiring
harness connector EO01 terminal No.62.

(b)

Repair serial communication circuit open resistance between
engine anti-theft system control module wiring harness
connector IP25 terminals No.8 and engine control module
wiring harness connector EO35 terminal No.72.

Can the vehicle start?

Yes

System normal

No

Step 11

Replace Anti-theft system control module.

(a)

Replace Anti-theft system control module. Refer to

2.5.8.2

 

Anti-theft System Control Module Replacement

.

(b)

Carry out engine anti-theft system programming procedures.
Refer to 

2.5.7.9

 

Replaced Security Module Programming

.

Yes

System normal

No

Step 12

Replace engine control module.

(a)

Replace engine control module. Refer to 

2.2.8.8

 

Engine

Control Module Replacement

.

(b)

Carry out engine anti-theft system programming procedures.
Refer to 

2.5.7.10

 

Replaced ECM Programming

.

Confirm the repair has been completed.

Next

Step 13

System normal.

2-822

Engine Anti-theft System JL4G15-D

Engine