DTC    P0710    Transmission Fluid Temperature Sensor "A" Circuit

DTC    P0712    Transmission Fluid Temperature Sensor "A" Circuit Low Input

DTC    P0713    Transmission Fluid Temperature Sensor "A" Circuit High Input

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DESCRIPTION

The Automatic Transmission Fluid (ATF) temperature sensor converts the fluid temperature into a resistance value which is input into the TCM.

C146747E01

The TCM applies a voltage to the temperature sensor through the TCM terminal THO1.
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes higher, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down as the temperature becomes higher.
The TCM calculates the fluid temperature based on the voltage signal.

DTC Code
DTC Detection Condition
Trouble Area
P0710
(a) and (b) are detected momentarily within 0.5 sec. when neither P0712 nor P0713 are stored (1 trip detection logic).
(a) The No. 1 ATF temperature sensor resistance is below 79 Ω.
(b) The No. 1 ATF temperature sensor resistance is higher than 156 kΩ.

HINT:
Within 0.5 sec., the malfunction switches from (a) to (b) or from (b) to (a).
  1. Open or short in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. TCM
P0712
The No. 1 ATF temperature sensor resistance is below 79 Ω for 0.5 sec. or more (1 trip detection logic).
  1. Short in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. TCM
P0713
When 15 min. or more have elapsed after the engine is started, the No. 1 ATF temperature sensor resistance is higher than 156 kΩ for 0.5 sec. or more (1 trip detection logic).
  1. Open in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. TCM

MONITOR DESCRIPTION

These DTCs indicate an open or short in the Automatic Transmission Fluid (ATF) temperature sensor circuit. The ATF temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature, and the TCM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is below 79 Ω*1 or higher than 156 kΩ*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM will turn on the MIL and store the DTC.

HINT:
  1. *1: 150°C (302°F) or higher is indicated regardless of the actual ATF temperature.
  2. *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.
  3. The ATF temperature can be checked on the intelligent tester display.

WIRING DIAGRAM


C155188E12


INSPECTION PROCEDURE


DATA LIST

HINT:
Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

  1. Warm up the engine.

  2. Turn the ignition switch off.

  3. Connect the intelligent tester to the DLC3.

  4. Turn the ignition switch to ON.

  5. Turn the intelligent tester on.

  6. Enter the following menus: Powertrain / ECT / Data List.

  7. According to the display on the tester, read the Data List.

    ECT 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    A/T Oil Temperature 1
    		No. 1 ATF temperature sensor value/
    Min.: -40°C (-40°F)
    Max.: 215°C (419°F)
    1. After stall test: Approximately 80°C (176°F)
    2. With engine cold: Equal to ambient temperature
    		If the value is -40°C (-40°F) or 215°C (419°F), the No. 1 ATF temperature sensor circuit is open or shorted.

    HINT:
    When DTC P0712 is stored and the intelligent tester output is 150°C (302°F) or higher, there is a short circuit.
    When DTC P0713 is stored and the intelligent tester output is -40°C (-40°F), there is an open circuit.
    Check the temperature displayed on the tester in order to check if a malfunction exists.

    Temperature Displayed
    		Malfunction
    -40°C (-40°F)
    		Open circuit
    150°C (302°F) or higher
    		Short circuit
    If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately stored (in 0.5 seconds). When P0713 is stored, P0711 cannot be stored. It is not necessary to inspect the circuit when P0711 is stored.
1.INSPECT TRANSMISSION WIRE (NO. 1 ATF TEMPERATURE SENSOR)
C159421E45

  1. Disconnect the E1 transmission wire connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 (OT-) - 10 (OT+)
    		Always
    		79 Ω to 156 kΩ
    2 (OT-) - Body ground
    		Always
    		10 kΩ or higher
    10 (OT+) - Body ground
    		Always
    		10 kΩ or higher

    HINT:
    If the resistance is out of the specified range of one of the ATF temperatures shown in the table below, the driveability of the vehicle may decrease.

    Resistance (Reference):
    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


NG
REPAIR OR REPLACE TRANSMISSION WIRE (NO. 1 ATF TEMPERATURE SENSOR)
OK


2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
C191544E21

  1. Disconnect the T19 TCM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T19-25 (THO1) - T19-23 (E2)
    		Always
    		79 Ω to 156 kΩ
    T19-25 (THO1) - Body ground
    		Always
    		10 kΩ or higher
    T19-23 (E2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM