Shift Paddle Switch Circuit [11/2017 - ]: Procedure

1. Disconnect the A78 ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Rear view of wire harness connector (to ECM)

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

   Standard Resistance

   Tester Connection	Shift Paddle Position	Specified Condition
   A78-29 (SFTU) - Body ground	Pull continuously "+" (Up shift)	Below 2.5 Ω
   	Release "+" (Up shift)	1 MΩ or higher
   A78-28 (SFTD) - Body ground	Pull continuously "-" (Down shift)	Below 2.5 Ω
   	Release "-" (Down shift)	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 [09/2014 - 03/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2019 - ] 

Result: 

NG 

See step  2

1. Disconnect the O25 spiral cable sub-assembly connector.
2. Disconnect the A78 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A78-29 (SFTU) - O25-8 (SUP)	Always	Below 1 Ω
   A78-28 (SFTD) - O25-1 (SDN)	Always	Below 1 Ω
   A78-29 (SFTU) or O25-8 (SUP) - Body ground	Always	10 kΩ or higher
   A78-28 (SFTD) or O25-1 (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 - BODY GROUND) 

Result: 

OK 

See step  3

1. Disconnect the O25 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
   O25-2 (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  4

1. Inspect the spiral cable sub-assembly.

   Refer to INSPECTION [11/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  COMPONENTS [11/2017 - 03/2019]  , or refer to  COMPONENTS [03/2019 - 01/2023]  , or refer to  COMPONENTS [01/2023 - ] 

Result: 

OK 

See step  5

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

   Refer to REMOVAL [11/2017 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B-1 (SDN) - B-2 (ECC)	Pull continuously "-" (Down shift)	Below 2.5 Ω
   	Release "-" (Down shift)	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TRANSMISSION SHIFT SWITCH ASSEMBLY (SHIFT PADDLE SWITCH LH). Refer to  COMPONENTS [11/2017 - ] 

Result: 

OK 

See step  6

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

   Refer to REMOVAL [11/2017 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-3 (SUP) - A-2 (ECC)	Pull continuously "+" (Up shift)	Below 2.5 Ω
   	Release "+" (Up shift)	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TRANSMISSION SHIFT SWITCH ASSEMBLY (SHIFT PADDLE SWITCH RH). Refer to  COMPONENTS [11/2017 - ] 

Result: 

OK 

See step  7

1. Install the transmission shift switch assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (No. 1 switch wire)

   Refer to INSTALLATION [11/2017 - ]

2. Disconnect the z12 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
   z12-1 (SUP) - z12-4 (ECC)	Pull continuously "+" (Up shift)	Below 2.5 Ω
   	Release "+" (Up shift)	1 MΩ or higher
   z12-3 (SDN) - z12-4 (ECC)	Pull continuously "-" (Down shift)	Below 2.5 Ω
   	Release "-" (Down shift)	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 [09/2014 - 03/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2019 - ] 

Result: 

NG 

REPLACE NO. 1 SWITCH WIRE. Refer to  COMPONENTS [11/2017 - ]