DTC P0740-7E: Torque Converter Clutch Actuator Stuck On [10/2022 - ]: Procedure

1. Read the DTCs using the GTS.

   Powertrain > Transmission > Trouble Codes 

   HINT: 

   If any DTCs other than P0740-7E are output, perform troubleshooting for those DTCs first.

   Result

   Result	Proceed to
   Only P0740-7E is output	A
   P0740-7E and other DTCs are output	B

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 08/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Disconnect the B25 transmission wire connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component without harness connected (Transmission Wire)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B25-13 (SL) - Body ground	20°C (68°F)	11 to 15 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  7

Result: 

OK 

See step  3

Pre-procedure1

• Remove the solenoid (SL) valve.

  HINT: 

  Refer to DISASSEMBLY [10/2022 - ]

• 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.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Solenoid (SL) Valve

  OK

  Valve moves and makes an operating sound.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPLACE SOLENOID (SL) VALVE. Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  4

1. Inspect the transmission valve body assembly.

   HINT: 

   Refer to REMOVAL [10/2022 - ]

   OK

   There is no foreign matter on each valve and they operate smoothly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  5

1. Inspect the torque converter assembly.

   Refer to INSPECTION [10/2022 - ]

   OK

   The torque converter assembly is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE TORQUE CONVERTER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  6

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

PERFORM REGISTRATION. Refer to  REGISTRATION [10/2022 - ] 

Pre-procedure1

• Remove the solenoid (SL) valve.

  HINT: 

  Refer to DISASSEMBLY [10/2022 - ]

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Solenoid (SL) Valve

  Standard Resistance

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

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPAIR OR REPLACE TRANSMISSION WIRE. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE SOLENOID (SL) VALVE. Refer to  REMOVAL [10/2022 - ]