Inspection Procedure

HINT:

Using the Data List displayed by the Techstream, you can read the values of the switches, sensors, actuators and so on without parts removal. Reading the Data List as the first step of troubleshooting is one method of shortening labor time.

1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON.
5. Turn the tester on.
6. Select the following items: Powertrain / Engine and ECT / Data List.
7. In accordance with the display on the tester, read the Data List.
   DATA LIST REFERENCE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   A/T Oil Temperature 1	ATF Temperature Sensor Value/ min.: -40°C (-40°F) max.:215°C (419°F)	After Stall Test; Approximately 80°C (176°F) Equal to ambient temperature when cold soak	If value is -40°C (-40°F) or 150°C (302°F) or more, ATF temperature sensor circuit is open or short.

   HINT:

   When DTC P0712 is output and the Techstream reading is 150°C (302°F) or more, there is a short circuit.

   When DTC P0713 is output and the Techstream reading is -40°C (-40°F), there is an open circuit.

   Measure the resistance between terminal THO1 and the body ground.

   TEMPERATURE SPECIFICATION
   
   

   Temperature Displayed	Malfunction
   -40°C (-40°F)	Open circuit
   150°C (302°F) or more	Short circuit

   HINT:

   If a circuit related to the ATF (Automatic Transmission Fluid) temperature sensor becomes open, P0713 is immediately set (within 0.5 seconds).

1. Disconnect the transmission wire connector from the transaxle.
Fig 1: Identifying Transmission Wire (ATF Temperature Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   1 (THO) - 6 (E2)	79 Ω to 156kΩ
   1 (THO) - Body ground	10 kΩ or higher
   6 (E2) - Body ground	10 kΩ or higher

   HINT:

   If the resistance is outside the specified range at either of the ATF temperatures shown in the table below, the drive ability of the vehicle may be affected.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   ATF Temperature	Specified Condition
   20°C (68°F)	3 to 4 kΩ
   110°C (230°F)	0.22 to 0.28 kΩ

NG: REPAIR OR REPLACE TRANSMISSION WIRE (See  REMOVAL   ) 

OK: go to next step 

1. Connect the transmission wire connector to the transaxle.
Fig 2: Identifying Harness And Connector (Transmission Wire - ECM)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector.
3. Measure the resistance.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   72 (THO1) - 95 (ETHO)	79 Ω to 156 kΩ
   72 (THO1) - Body ground	10 kΩ or higher
   95 (ETHO) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM  (See REMOVAL )