DTC P0740-7E: Torque Converter Clutch Actuator Stuck On [08/2020 - ]: 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 / Transmission / Trouble Codes.

   Powertrain > Transmission > Trouble Codes 

5. Read the DTCs using the Techstream.

   Result

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

   HINT: 

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

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ] 

Result: 

A 

See step  2

1. Disconnect the C30 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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  3

1. Remove the solenoid (SL) valve.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Solenoid (SL) Valve

   Refer to DISASSEMBLY [08/2020 - ]

2. 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: 

NG 

REPLACE SOLENOID (SL) VALVE. Refer to  COMPONENTS [08/2020 - ] 

Result: 

OK 

See step  4

1. Inspect the transmission valve body assembly.

   Refer to REMOVAL [08/2020 - ]

   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  COMPONENTS [08/2020 - ] 

Result: 

OK 

See step  5

1. Inspect the torque converter assembly.

   Refer to INSPECTION [08/2020 - ]

   OK

   The torque converter assembly is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE TORQUE CONVERTER ASSEMBLY. Refer to  COMPONENTS [08/2020 - ] 

Result: 

OK 

See step  6

1. Repair or replace the automatic transaxle assembly.

   Refer to COMPONENTS [08/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM REGISTRATION. Refer to  REGISTRATION [08/2020 - ] 

1. Remove the solenoid (SL) valve.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Solenoid (SL) Valve

   Refer to DISASSEMBLY [08/2020 - ]

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE TRANSMISSION WIRE. Refer to  COMPONENTS [08/2020 - 08/2021]  , or refer to  COMPONENTS [08/2021 - ] 

Result: 

NG 

REPLACE SOLENOID (SL) VALVE. Refer to  COMPONENTS [08/2020 - ]