Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

HINT

Using the Techstream 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

NOTE: 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.

Warm up the engine
Turn the engine switch off.
Connect the Techstream to the DLC3
Turn the engine switch on (IG)
Turn the Techstream on
Enter the following menus Powertrain / ECT / Data List
According to the display on the Techstream, read the Data List

TCM

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 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

HINT.

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

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 temperature sensor becomes open, P0713 is set in approximately 0 5 seconds It is not necessary to inspect the circuit when P0711 is set

CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE - TCM, TRANSMISSION WIRE (ATF TEMPERATURE SENSOR))

Disconnect the TCM connector

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E59-12 (THO1) - E59-13 (E2)	Always	79 Ω to 156 kΩ
E59-13 (E2) - Body ground	Always	10 kΩ or higher
E59-12 (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

Fig 1: Identifying E59 TCM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEMPERATURE SPECIFICATION

Tester Connection	ATF Temperature	Specified Condition
E59-12 (THO1) - E59-13 (E2)	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: Go to step 3

OK: Go to next Step

REPLACE TCM
1. Replace the TCM (See REMOVAL ).
NEXT: PERFORM A/T CODE REGISTRATION (See REGISTRATION )

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)

Disconnect the transmission wire connector
Disconnect the TCM connector

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E47-8 (OIL) - E59-12 (THO1)	Always	Below 1 Ω
E47-9 (E2) - E59-13 (E2)	Always	Below 1 Ω
E47-8 (OIL) or E59-12 (THO1) - Body ground	Always	10 kΩ or higher
E47-9 (E2) or E59-13 (E2) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying E59 TCM And E47 Transmission Wire Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPAIR OR REPLACE TRANSMISSION WIRE (See REMOVAL )