3.5.7.11 P0712 P0713 

1. DTC 

description: 

DTC P0712 

Oil temperature of transmission sensor voltage is low 

 

DTC P0713 

Transmission oil temperature sensor high voltage (open circuit) 

The Automatic transmission oil temperature sensor is installed in the electromagnetic valve body wire harness. 
The sensor of the TFT is a negative coefficient thermal thermostat. When the transmission fluid is at a low 
temperature, the sensor resistance is high and will decrease with the temperature rise. 

The transmission control unit (TCU) provides a 5V reference signal to the automatic transmission oil temperature 
sensor to measure the voltage drop in the circuit. When the oil temperature of the automatic transmission is 
increased, the resistance of the sensor is decreased. 

2.  Conditions for setting DTC and the fault position: 

DTC Code  DTC detection strategy  Conditions for setting the DTC 

(Control strategy) 

Fault positions 

P0712 

The transmission oil 
temperature sensor 
provides a grounding 
short circuit indicative 
value. 

P0713 

The transmission oil 
temperature sensor 
provides an open circuit 
indicative value. 

Ignition switch is in ON position 

1. Electromagnetic 

valve and harness 
assembly 

2. TCU 

3.  

Automatic 

transmission 
assembly 

3. Circuit 

sketch 

1295

 
 

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 
P0712 and P0713 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 

Go to step 

DTC P0712, P0713 

Yes 

DTC except for DTC P0712, P0713 

No 

 

Gears switch 

Main relay 

JF-1

Reverse output 

signal

Starts relay JB-2

Shifter 

Electromagnetic 

valve 

1296

 
 

 

 

 

2 

Detect the oil temperature sensor resistor. 

 

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 No.25 

and 26 of the electromagnetic valve harness 
connector J-4. 

 

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

Standard resistance value (for detailed parameters, see 3.5.1.3 temperature-resistance relationship of 
automatic transmission oil temperature sensor): 20  (

℃

68ºF)56.74 kΩ-65.86kΩ 

Does it conform to the standard value? 

 

 

 

3 

Detect the signal voltage of oil temperature sensor. 

A.    Turn the ignition switch to the OFF position. 

B.    Disconnect the harness connector J-4 of the electromagnetic valve. 

C.    Turn the ignition switch to the ON position. 

D.    Measure the voltage between Terminals 25 and 26 of the electromagnetic valve harness connector J-4. 

Standard voltage: 4.9-5.1V 

Does it conform to the standard value? 

 

 

 

4 

Detect the oil temperature sensor circuit. 

 

No

Yes

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

No

Yes 

Replace electromagnetic valve assembly 

No

Yes

Refer to 3.4.7.8 replacement of automatic 
transmission control module to replace TCU. 

Electromagnetic valve harness connectorJ-4

1297

 
 

 

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.25 

of the electromagnetic valve harness connector 
J-4 and terminal No.18 of the automatic control 
module J-3. 

D.    Measure the resistance between Terminal No.26 

of the electromagnetic valve harness connector 
J-4 and terminal No.8 of the automatic control 
module J-3. 

E.    Turn the ignition switch to the ON position. 

F.  Measure voltage of electromagnetic valve 

harness connector J-4terminalNo.25 and reliable 
grounding 

自动变速器控制模块线束连接器 J-3

1

11

2

12

3

13

4

14

5

15

6

16

7

17

8

18

9

19

10

20

SL03-0036c

G.    Measure the voltage between terminal No.26 of the electromagnetic valve harness connector J-4 and secure 

ground wire. 

Results 

Test items 

Standard value 

J-4(25) — J-3(18) 

Less than 3 Ω 

J-4(26) — J-3(8) 

Less than 3 Ω 

J-4(25) — Reliable grounding voltage value 

O V 

J-4(26) — Reliable grounding voltage value 

0 V 

Does it conform to the standard value? 

 

 

 

5 ReplaceTCU 

Refer to 3.5.7.8 replace automatic transmission control module 

 

 

6 

Go to automatic transmission fresh process. 

Refer to 3.5.7.4 Automatic transmission refresh process 

No

Yes

Circuit fault, repair circuit. 

Next

Auto-transmissioncontrol module harness 

connectorJ-3

 

1298