3.5.5.2 Circuit schematic diagram 

T

C

U

电磁阀

换挡器

档位开关

LEVER

REVERSE

START

VBS5

VBS6

VBS7

VBS8

VBS

9

VBS1

0

O

n

O

ff

1

O

n

O

ff2

O

n

O

ff3

O

n

O

ff

4

EMM

INPU

T

SHAFT

SPEED

SE

NSOR

OUTPU

T

SHAFT

t

SPEED

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

 

Gears switch 

Main relay 

JF-1 

 

Reverse output 

signal 

 

Starts relay JB-2 

Shifter 

Electromagnetic 

valve 

1267

 
 

 

3.5.6 Diagnostic Information and Procedures 

3.5.6.1 Diagnosis descriptions 

Refer to 3.5.2 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 procedures, more importantly, it will also 
help to determine whether the situation described by the customer is normal. 

Diagnostic introduction: 

The automatic transmission suddenly produces the following symptoms, such as noise or vibration, transmission 
oil leakage, and vehicle incapable of moving forward or backward, which may be caused by mechanical 
problems. 

The following problems may result in the control system failure: original ECU failure, gear switch failure and 
wire harness connector failure. 

3.5.7.2 Check control system 

Diagnostic fault finding strategy: 

Please use the following procedures to check your faults. If follow these procedures carefully, you will find most 
of the automatic transmission failure. 

1.  Collect fault information from vehicle owner as much as possible. 

2.  Verify fault situations described by vehicle owner. 

3.  Check if vehicle has anto-transmission trouble code (DTC). 

4.  If fault symptol only appears occasionally and no fault code (DTC) appears, it indicates that such fault is 

remittent. see 2.2.6.3 Inspection for intermittent malfunctions. 

5.  In case of the disnostic testing code unavailable although the malfunction can be confirmed or the failure of 

the system to communicate with the dianostic tester, see 2.2.6.26 DTC U1073. 

6.  Record the diagnostic testing code (DTC) if any. 

7.  Check with the malfunction conditions again after the road test is performed. 

8.  See the DTC List in the event of another appearance of DTC. 

9.  If the DTC does not appear again, then the malfunction is an intermittent malfunction. See 2.2.6.3 inpection 

of intermittent malfunctions. 

10.  After repair, conduct road test again, to confirm that fault is eliminated. 

3.5.7.3 Stall test 

Be capable of carrying our underspeed test to the DSI automatic transmission to ensure whether the 
transmission-clutch can bear all torque of the engine, without sliding. 

1.  Time of stall test should not exceed 10s. 

2.  Pull up manual brake; 

3. Start 

the 

engine 

4.  Press down brake pedal and keep its status; 

Note: keep stepping on the brake pedal in the whole process of stepping on the accelerator pedal. 

5.  Shift to the forward position (D gear); 

6.  100 % depress (fully) and hold the accelerator pedal for 6s; 

7.  Look at engine speed; 

1268

 
 

8.  Release the accelerator pedal; 

9.  Shift to reverse (R) gear; 

10.  100 % press down accelerator pedal, keep 6s; 

11.  Look at engine speed; 

If the engine speed is higher than 2800rpm, the transmission has hardware fault. 

1269

 
 

 

3.5.7.4 Automatic transmission refresh process 

Note: after replacing the automatic transmission assembly or transmission control unit (TCU), need to execute 
the following procedure to reset the automatic transmission. 

1 

Rematch the automatic transmission 

A.    Connect fault diagnosis tester. 

B.    Put the transmission shift lever in the P position and turn the ignition switch to the ON position (with the 

engine not in operation); 

C.    Run the reset adaptive data program and wait for the response; 

 

 

2 

Activate the original data 

A.    Connect fault diagnosis tester. 

B.    Put the transmission shift lever in the P position and turn the ignition switch to the ON position (with the 

engine not in operation); 

C.    Run the activate adaptive initial offsetting program and wait for the response; 

 

 

3 

Reset actual service life 

A.    Connect fault diagnosis tester. 

B.    Put the transmission shift lever in the P position and turn the ignition switch to the ON position (with the 

engine not in operation); 

C.    Run the set mileage program. 

Note: after replacing the new transmission or the warranty on the transmission is expired, the actual service 
life may be set as 0km. 

 

 

4 Re-commissioning 

A.    Turn the ignition switch to the OFF position. 

B.    Restart the vehicle to check if the automatic transmission can normally operate. 

Check if the automatic transmission automatically operates? 

 

 

 

Next 

Next 

Next 

Yes

No 

The matching is done. 

1270