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
SPD (NT)	Input shaft speed/ Min 0 rpm Max 12750 rpm	Lock-up is ON (after warming up engine) Input turbine speed (NT) is equal to engine speed OFF (idling with shift lever in N) Input turbine speed (NT) is nearly equal to engine speed	Data is displayed in increments of 50 rpm

HINT:

SPD (NT) is always 0 while driving: Open or short in the sensor or circuit.
SPD (NT) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

CHECK SPEED SENSOR TERMINAL (NT TERMINAL)

Disconnect the transmission wire connector
Turn the engine switch on (IG).

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

Standard Voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
E47-1 (NTB) - Body ground	Engine switch on (IG)	11 to 14 V

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E47-2 (NTO) - Body ground	Always	99 to 101 Ω

Fig 1: Identifying E47 Transmission Wire Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 3

OK: Go to next Step

INSPECT TRANSMISSION WIRE (SPEED SENSOR NT)

Disconnect the speed sensor (NT) connector (See REMOVAL ).
Disconnect the transmission wire connector

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
Terminal 1 of the speed sensor (NT) connector -1 (NTB)	Always	Below 1 Ω
Terminal 2 of the speed sensor (NT) connector -2 (NTO)	Always	Below 1 Ω
Terminal 1 of the speed sensor (NT) connector or 1 (NTB) - Body ground	Always	10 kΩ or higher
Terminal 2 of the speed sensor (NT) connector or 2 (NTO) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Transmission Wire And Speed Sensor NT Connector Terminal

NG: REPAIR OR REPLACE TRANSMISSION WIRE (See REMOVAL )

OK: REPLACE SPEED SENSOR (See REMOVAL )

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
E47-1 (NTB) - E59-21 (NTB)	Always	Below 1 Ω
E47-2 (NTO) - E59-20 (NTO)	Always	Below 1 Ω
E47-1 (NTB) or E59-21 (NTB) - Body ground	Always	10 kΩ or higher
E47-2 (NTO) or E59-20 (NTO) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying E59 TCM And E47 Transmission Wire Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next Step

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