UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: Shift Paddle Switch Circuit; 2019 - 2022 MY Avalon [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001ARO1
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - ]
Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: Shift Paddle Switch Circuit; 2019 - 2022 MY Avalon [04/2018 - ]

Shift Paddle Switch Circuit

DESCRIPTION

Moving the shift lever to S enables the shift range to be selected. The shift range can be selected by operating the "+" or "-" shift paddle switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click here

PROCEDURE

1.	READ VALUE USING TECHSTREAM (SPORT SHIFT SWITCH STATUS)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Data List.

(e) According to the display on the Techstream, read the Data List.

Powertrain > Engine > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Sport Shift Up SW	Sport shift up switch status	ON or OFF	ON: Shift lever held in "+" or "+" shift paddle switch operated OFF: Shift lever not held in "+" and "+" shift paddle switch released	-
Sport Shift Down SW	Sport shift down switch status	ON or OFF	ON: Shift lever held in "-" or "-" shift paddle switch operated OFF: Shift lever not held in "-" and "-" shift paddle switch released	-

Powertrain > Engine > Data List

Tester Display
Sport Shift Up SW
Sport Shift Down SW

Result	Proceed to
Data List values are normal	A
Data List values are not normal	B

CHECK FOR INTERMITTENT PROBLEMS

2.	CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH CIRCUIT)

(a) Disconnect the A18 ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A18-38 (SFTU) - Body ground	"+" (Up shift) shift paddle switch operated and held	Below 2.5 Ω
A18-38 (SFTU) - Body ground	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher
A18-37 (SFTD) - Body ground	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
A18-37 (SFTD) - Body ground	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

(a) Disconnect the G17 spiral cable sub-assembly connector.

(b) Disconnect the A18 ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A18-38 (SFTU) - G17-8 (SUP)	Always	Below 1 Ω
A18-37 (SFTD) - G17-1 (SDN)	Always	Below 1 Ω
A18-38 (SFTU) or G17-8 (SUP) - Body ground	Always	10 kΩ or higher
A18-37 (SFTD) or G17-1 (SDN) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

4.	CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

(a) Disconnect the G17 spiral cable sub-assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G17-2 (ECC) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

5.	INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Inspect the spiral cable sub-assembly.

Click here

REPLACE SPIRAL CABLE SUB-ASSEMBLY

6.	INSPECT SHIFT PADDLE SWITCH LH (NO. 1 TRANSMISSION SHIFT SWITCH ASSEMBLY)

(a) Remove the shift paddle switch LH (No. 1 transmission shift switch assembly).

Click here

*a	Component without harness connected (Shift Paddle Switch LH (No. 1 Transmission Shift Switch Assembly))

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-1 (SDN) - A-2 (ECC)	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
A-1 (SDN) - A-2 (ECC)	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher
A-1 (SDN) - A-3 (ECC1)	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
A-1 (SDN) - A-3 (ECC1)	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

REPLACE SHIFT PADDLE SWITCH LH (NO. 1 TRANSMISSION SHIFT SWITCH ASSEMBLY)

7.	INSPECT SHIFT PADDLE SWITCH RH (NO. 2 TRANSMISSION SHIFT SWITCH ASSEMBLY)

(a) Remove the shift paddle switch RH (No. 2 transmission shift switch assembly).

Click here

*a	Component without harness connected (Shift Paddle Switch RH (No. 2 Transmission Shift Switch Assembly))

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
B-1 (SUP) - B-2 (ECC)	"+" (Up shift) shift paddle switch operated and held	Below 2.5 Ω
B-1 (SUP) - B-2 (ECC)	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher

REPLACE SHIFT PADDLE SWITCH RH (NO. 2 TRANSMISSION SHIFT SWITCH ASSEMBLY)

8.	INSPECT NO. 1 SWITCH WIRE

(a) Install the No. 1 and No. 2 transmission shift switch assemblies.

Click here

*a	Front view of wire harness connector (to Spiral Cable Sub-assembly)

(b) Disconnect the z2 No. 1 switch wire connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
z2-2 (SUP) - z2-3 (ECC)	"+" (Up shift) shift paddle switch operated and held	Below 2.5 Ω
z2-2 (SUP) - z2-3 (ECC)	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher
z2-4 (SDN) - z2-3 (ECC)	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
z2-4 (SDN) - z2-3 (ECC)	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE NO. 1 SWITCH WIRE