Inspection Procedure: Procedure

WARNING: This page is about a different car, the 2010 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)

Disconnect the steering pad switch connector and spiral cable connector.

Fig 1: Checking Spiral Cable -- Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Tester Connection	Specified Condition
2 - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT SPIRAL CABLE SUB-ASSEMBLY

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

Fig 2: Identifying Spiral Cable Sub-Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection	Condition	Specified Condition
J24-2 - k1-6	Always	Below 1 Ω
J24-9 - k1-2	Always	Below 1 Ω
J24-10 - k1-3	Always	Below 1 Ω

NG → REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK: Go to next step

INSPECT TRANSMISSION SHIFT SWITCH ASSEMBLY

Disconnect the switch wire connector from the transmission shift switch.

Fig 3: Identifying Transmission Shift Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance between each terminal when the paddle shift is moved to each position.

Standard resistance

Paddle Shift Position	Tester Connection	Specified Condition
Pull continuously "+" (Up shift)	SUP - ECC	Below 1 Ω
Release "+" (Up shift)	↑	10 kΩ or higher
Pull continuously "-" (Down shift)	SDN - ECC	Below 1 Ω
Release "-" (Down shift)	↑	10 kΩ or higher

NG → REPLACE TRANSMISSION SHIFT SWITCH ASSEMBLY

OK: Go to next step

INSPECT SWITCH NO. 1 WIRE

Connect the switch wire connector to the transmission shift switch.

Fig 4: Identifying Switch No. 1 Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance between each terminal when the paddle shift is moved to each position.

Standard resistance

Paddle Shift Position	Tester Connection	Specified Condition
Pull continuously "+" (Up shift)	2 - 6	Below 1 Ω
Release "+" (Up shift)	↑	10 kΩ or higher
Pull continuously "-" (Down shift)	3 - 6	Below 1 Ω
Release "-" (Down shift)	↑	10 kΩ or higher

NG → REPLACE SWITCH NO. 1 WIRE

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM)

Connect the spiral cable connector and steering pad switch connector.

Fig 5: Identifying ECM A6 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below when the paddle shift is moved to each position.

Standard resistance

Paddle Shift Position	Tester Connection	Specified Condition
Pull continuously "+" (Up shift)	A6-30 (SFTU) - Body ground	Below 1 Ω
Release "+" (Up shift)	↑	10 kΩ or higher
Pull continuously "-" (Down shift)	A6-19 (SFTD) - Body ground	Below 1 Ω
Release "-" (Down shift)	↑	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE