DTC P0740-15: Torque Converter Clutch Circuit Short to Battery or Open [11/2018 - ]: Procedure

1. Disconnect the transmission wire connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Transmission Wire)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   13 (S1) - Body ground	20°C (68°F)	11 to 15 Ω
   13 (S1) - Other terminals	Always	10 kΩ or higher

3. Connect the transmission wire connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  2

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C41-19 (SL) - Body ground	20°C (68°F)	11 to 15 Ω
   C41-19 (SL) - Other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) 

Result: 

OK 

See step  3

1. Replace the ECM.

   Refer to REMOVAL [11/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM REGISTRATION 

Refer to REGISTRATION [11/2018 - ]

1. Remove the solenoid (SL) valve.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Solenoid (SL) Valve

   Refer to DISASSEMBLY [11/2018 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Solenoid (SL) valve connector terminal - Solenoid (SL) valve body	20°C (68°F)	11 to 15 Ω

3. Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.

   OK

   Valve moves and makes an operating sound.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE TRANSMISSION WIRE 

Refer to REMOVAL [11/2018 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

NG 

REPLACE SOLENOID (SL) VALVE 

Refer to DISASSEMBLY [11/2018 - ]