T

C

U

电磁阀

换挡器

档位开关

LEVER

REVERSE

START

VBS5

VBS6

VBS7

V

BS8

VBS9

VBS1

0

O

n

O

ff

1

O

n

O

ff

2

O

n

O

ff

3

O

n

O

ff

4

EMM

INPUT

SHAFT

SPEE

D

SENSOR

OU

TPUT

SHAFT

t

SPE

ED

SENSOR

25

26

10

11

9

8

13

12

24

23

22

21

20

7

6

5

4

3

2

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

J-4

1

18

8

1

3

2

12

14

4

11

12

9

10

15

2

1

4

3

6

5

7

7

J-5

5

16

17

J-5

4

J-5

1

J-5

6

J-5

2

J-5

3

4

11

10

10

15

3

CAN H

启动继电器

倒车信号

输出

主继电器

JF-1

IG2

JB-2

CAN L

10

20

J-3

J-1

J-3

J-2

J-2

J-3

J-3

J-3

J-1

8

J-3

J-3

J-3

J-3

J-3

J-3

J-3

J-3

J-1

J-1

J-1

J-1

J-1

J-1

J-1

J-1

J-1

J-1

J-1

J-1

IF36

NL03-2005c

 

4. Diagnostic 

procedures: 

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 

Read the fault code again after clearing away the fault code to check if fault codes, except DTC 
P0973 and P0974 exist in the control system. 

A.    Connect fault diagnosis tester to the datalink connector. 

B.  Rotated ignition switch to ON position 

C.    Switch on fault diagnostic device power supply 

D.  Clear DTC code. 

E.    Reset reading fault code, and check if DTCs meet setting condition of fault code in current 

DTC codes shown 

To Step 

DTC P0973 P0974 

Yes 

DTCs other than DTCs P0973 and P0974 

No 

 

Gears switch 

Main relay 

JF-1

Reverse output 

signal

Start relay JB-2

Shifter 

Electromagnetic 

valve 

1363

 
 

 

 

 

2 

Detect TCU power supply circuit 

See 3.5.7.8 P0603 P0604 P1604 P1701 P1703 

 

 

3 

Detect resistance of on/off electromagnetic valve S1. 

 

A.    Turn the ignition switch to the OFF position. 

B.  Disconnect the harness connector J-4 of the 

electromagnetic valve. 

C.    Measure the resistance between Terminals 21 and 

20 of the electromagnetic valve harness 
connector J-4. 

Standard resistant value :20.8Ω-23.2Ω 

 

电磁阀线束连接器

J-4

1

8

20

14

9

15

10

16

11

17

12

18

13

19

2

21

3

22

4

23

5

24

6

25

7

26

SL03-0036c

Does it conform to the standard value? 

 

 

 

3 

Detect ON/OFF electromagnetic valve S1 circuit 

 

No

Yes 

Refer to3.4.7.6 fault diagnosis code (DTC) chapter 
index

Next

No

Yes 

Replace auto-transmission assembly, refer to3.4.7.6 
auto-transmission assembly replacement 

Electromagneticvalve harness connectorJ-4

1364

 
 

 

A.  rotated ignition switch to OFF position. 

B.  Disconnect the harness connector J-4 of the 

electromagnetic valve. 

C.   Measure the resistance between terminal No.21 

of the electromagnetic valve harness connector 
J-4 and Terminal No.10 of the automatic control 
module J-1. 

D.  Measure the resistance between terminal No.20 

of the electromagnetic valve harness connector 
J-4 and Terminal No.15 of the automatic control 
module J-1. 

E.    Turn the ignition switch to the ON position. 

F.  Measure voltage of electromagnetic valve 

harness connector J-4No.21 terminal and reliable 
grounding 

自动变速器控制模块线束连接器

J-1

1

9

2

10

3

11

4

12

5

13

6

14

7

15

8

16

SL03-0034c

G.  Measure the resistance between Terminal No.20 of the electromagnetic valve harness connector J-4 and 

secure ground wire. 

Results 

Test Items 

Standard Value 

J-4 (21) — J-1(10) 

Less than 3 Ω 

J-4 (20) — J-1(15) 

Less than 3 Ω 

J-4 (21) — reliable grounding voltage value 

0 V 

J-4 (20) — reliable grounding resistance value 

Less than 3 Ω 

Does it conform to the standard value? 

 

 

 

4 ReplaceTCU 

Refer to3.5.7.8 replace automatic transmission control module 

 

 

5 

Go to automatic transmission fresh process. 

Refer to3.5.7.4 Automatic transmission refresh process 

No

Yes 

Circuit malfunction, repair circuit. 

Next 

Auto-transmissioncontrol module harness connectorJ-1

1365

 
 

 

 

6 

Use fault diagnosis tester to confirm if DTC is stored again. 

A.    Connect fault diagnosis tester to the data link connector. 

B.  Rotated ignition switches to ON position. 

C.    Clear DTC code. 

D.    Start and run the engine at idle speed to warm up the engine for at least 5min. 

E.    Read control system DTC code again to confirm that the system has no DTC code exported. 

 

 

 

7 Troubleshooting 

5. Maintenance 

guide: 

Replace Automatic transmission control module, refer to3.5.7.8 replace automatic transmission control module 

Replace Automatictransmission assembly , refer to3.5.7.6 Automatictransmission assembly replacement 

Yes

No

Next 

Refer to 2.2.7.3 Intermittent Fault Inspection for 
intermittent fault. 

1366