Automatic Transmission System Shift Paddle Switch Circuit

Transmission. Lexus Is250, Is220D. Gse20 Ale20
A960E Automatic Transmission. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)

INSPECT SPIRAL CABLE SUB-ASSEMBLY

INSPECT TRANSMISSION SHIFT SWITCH ASSEMBLY

INSPECT SWITCH WIRE

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM)

AUTOMATIC TRANSMISSION SYSTEM - Shift Paddle Switch Circuit


DESCRIPTION

When moving the shift lever into the S position using the transmission control switch, it is possible to switch the shift range position between "1" (first range) and "6" (sixth range).
Shifting up "+" once raises one shift range position, and shifting down "-" lowers one shift range position.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit

  1. Disconnect the steering pad switch connector and spiral cable connector.

  1. 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


2.INSPECT SPIRAL CABLE SUB-ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit

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

    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


3.INSPECT TRANSMISSION SHIFT SWITCH ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit

  1. Disconnect the switch wire connector from the transmission shift switch.

  1. 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)
    		SFTU - ECC
    		Below 1 Ω
    Release
    "+"
    (Up shift)
    		↑
    		10 kΩ or higher
    Pull continuously
    "-"
    (Down shift)
    		SFTD - ECC
    		Below 1 Ω
    Release
    "-"
    (Down shift)
    		↑
    		10 kΩ or higher


NG
REPLACE TRANSMISSION SHIFT SWITCH ASSEMBLY
OK


4.INSPECT SWITCH WIRE


    Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit

  1. Connect the switch wire connector to the transmission shift switch.

  1. 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 WIRE
OK


5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM)


    Lexus Is250, Is220D. Gse20 Ale20.A960E Automatic Transmission.Automatic Transmission System.Automatic Transmission System Shift Paddle Switch Circuit

  1. Connect the spiral cable connector and steering pad switch connector.

  1. Disconnect the ECM connector.

  1. 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