DTC P0712: Transmission Fluid Temperature Sensor "A" Circuit Low Input; DTC P0713: Transmission Fluid Temperature Sensor "A" Circuit High Input [11/2021 - ]: Procedure

1. Warm up the engine.
2. Turn the engine switch off.
3. Connect the Techstream to the DLC3.
4. Turn the engine switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / ECT / Data List / A/T Oil Temperature 1.
7. Read the Data List according to the display on the Techstream.

   Powertrain > ECT > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   A/T Oil Temperature 1	ATF temperature sensor value	Min.: -40°C (-40°F) Max.: 150°C (302°F)	After stall speed test: Approximately 80°C (176°F) While engine is cold: Equal to ambient temperature	If value is -40°C (-40°F) or 150°C (302°F), ATF temperature sensor circuit is open or short circuited

   Powertrain > ECT > Data List 

   Tester Display
   A/T Oil Temperature 1

   Result

   Result	Proceed to
   Data List value is normal	A
   Data List value is not normal	B

Result: 

A 

See step  3

Result: 

B 

See step  2

1. Disconnect the F156 TCM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Rear view of wire harness connector (to TCM)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F156-12 (THO1) - F156-13 (E2)	Always	79 Ω to 156 kΩ
   F156-13 (E2) - Body ground	Always	10 kΩ or higher
   F156-12 (THO1) - Body ground	Always	10 kΩ or higher

   HINT: 

   If the resistance is out of the specified range with the ATF temperature shown in the table below, the driveability of the vehicle may decrease.

   ATF Temperature	Specified Condition
   10°C (50°F)	5 to 8 kΩ
   25°C (77°F)	2.5 to 4.5 kΩ
   110°C (230°F)	0.22 to 0.28 kΩ

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  3

1. Replace the TCM.

   Refer to COMPONENTS [11/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM A/T CODE REGISTRATION. Refer to  REGISTRATION [11/2021 - ] 

1. Disconnect the F175 transmission wire connector.
2. Disconnect the F156 TCM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F175-8 (OIL) - F156-12 (THO1)	Always	Below 1 Ω
   F175-9 (E2) - F156-13 (E2)	Always	Below 1 Ω
   F175-8 (OIL) or F156-12 (THO1) - Body ground	Always	10 kΩ or higher
   F175-9 (E2) or F156-13 (E2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR). Refer to  COMPONENTS [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM)