Shift Paddle Switch Circuit [06/2017 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List.
5. 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

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

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2017 - 08/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 03/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2020 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 08/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2021 - ] 

Result: 

B 

See step  2

1. Disconnect the A21 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A21-38 (SFTU) - Body ground	"+" (Up shift) shift paddle switch operated and held	Below 2.5 Ω
   	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher
   A21-37 (SFTD) - Body ground	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
   	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2017 - ] 

Result: 

NG 

See step  3

1. Disconnect the K22 spiral cable sub-assembly connector.
2. Disconnect the A21 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A21-38 (SFTU) - K22-8 (SUP)	Always	Below 1 Ω
   A21-37 (SFTD) - K22-1 (SDN)	Always	Below 1 Ω
   A21-38 (SFTU) or K22-8 (SUP) - Body ground	Always	10 kΩ or higher
   A21-37 (SFTD) or K22-1 (SDN) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

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

Result: 

OK 

See step  4

1. Disconnect the K22 spiral cable sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K22-2 (ECC) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

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

Result: 

OK 

See step  5

1. Inspect the spiral cable sub-assembly.

   Refer to INSPECTION [03/2017 - 03/2020] , or refer to INSPECTION [03/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  COMPONENTS [03/2017 - 03/2020]  , or refer to  COMPONENTS [03/2020 - ] 

Result: 

OK 

See step  6

1. Remove the shift paddle switch LH (transmission shift switch assembly).

   Refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Shift Paddle Switch LH (Transmission Shift Switch Assembly))

2. 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
   	"-" (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
   	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [06/2017 - ] 

Result: 

OK 

See step  7

1. Remove the shift paddle switch RH (transmission shift switch assembly).

   Refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Shift Paddle Switch RH (Transmission Shift Switch Assembly))

2. 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
   	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [06/2017 - ] 

Result: 

OK 

See step  8

1. Install the transmission shift switch assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Refer to INSTALLATION [06/2017 - ]

2. Disconnect the z4 No. 1 switch wire connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z4-2 (SUP) - z4-3 (ECC)	"+" (Up shift) shift paddle switch operated and held	Below 2.5 Ω
   	"+" (Up shift) shift paddle switch not operated	1 MΩ or higher
   z4-4 (SDN) - z4-3 (ECC)	"-" (Down shift) shift paddle switch operated and held	Below 2.5 Ω
   	"-" (Down shift) shift paddle switch not operated	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2017 - ] 

Result: 

NG 

REPLACE NO. 1 SWITCH WIRE. Refer to  COMPONENTS [06/2017 - ]