Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)

Transmission. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
U151F Automatic Transaxle. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE DSL)

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

INSPECT SHIFT SOLENOID VALVE DSL

CHECK TRANSMISSION WIRE

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

DTC P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve DSL)


DESCRIPTION

The ECM uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor, intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condition of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the ECM memory to detect mechanical problems of the shift solenoid valve DSL, valve body and torque converter clutch.

DTC No.
DTC Detection Condition
Trouble Area
P0741
Lock-up does not occur when driving in the lock-up range (normal driving at 80 km/h [50 mph]), or lock up remains ON in the lock-up OFF range
(2 trip detection logic)
  1. Shift solenoid valve DSL remains open or closed
  2. Valve body is blocked
  3. Shift solenoid valve DSL
  4. Torque converter clutch
  5. Automatic transaxle (clutch, brake, gear, etc.)
  6. Line pressure is too low
  7. ECM

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on the speed sensor (NT), speed sensor (NC), engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the shift solenoid DSL. When the DSL is turned on, it applies pressure to the lock-up relay valve and locks the torque converter clutch.
If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system performance. The ECM will turn on the MIL and store the DTC.
HINT:
Example:
When either of the following is met, the system judges it as a malfunction.
  1. There is a difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ECM commands lock-up.
    (Engine speed is at least 75 rpm greater than input turbine speed.)
  2. There is no difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ECM commands lock-up off.
    (The difference between engine speed and input turbine speed is less than 35 rpm.)

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)


INSPECTION PROCEDURE

HINT:
Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
  1. Warm up the engine.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the DLC3.
  4. Turn the ignition switch ON and turn the tester ON.
  5. Enter the following menus: Powertrain / Engine and ECT / Active Test.
  6. Follow the instructions on the tester and perform the Active Test.

    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Activate the Lock Up
    		[Test Details]
    Control shift solenoid DSL to set automatic transaxle to the lock-up condition
    [Vehicle Condition]
    1. Throttle valve opening angle: Less than 35%
    2. Vehicle speed: 60 km/h (36 mph) or more
    		ON/OFF
    		Possible to check shift solenoid valve DSL operation
    HINT:
    1. This test can be conducted when the vehicle speed is 60 km/h (36 mph) or more.
    2. This test can be conducted in the 5th gear.
  7. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
    HINT:
    1. When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is ON.
    2. Slowly release the accelerator pedal in order to decelerate. (Do not fully release the pedal as that will close the throttle valve and lock-up may be turned OFF.)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)

1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

  1. Read the DTCs using the tester.

    Result:
    Result
    		Proceed to
    P0741
    		A
    P0741 and other DTCs
    		B
    HINT:
    If any other codes besides P0741 are output, perform troubleshooting for those DTCs first.


B
GO TO DTC CHART (RAV4_ACA30 RM000000W710ATX.html)
A


2.INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE DSL)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)

  1. Disconnect the transmission wire connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    10 (DSL) - Body ground
    		20°C (68°F)
    		11 to 13 Ω


NG
Go to step 4
OK


3.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)

  1. Connect the transmission wire connector.

  1. Disconnect the ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B96-9 (DSL) - Body ground
    		20°C (68°F)
    		11 to 13 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (for 2GR-FE) (RAV4_ACA30 RM0000017UO01GX.html)

4.INSPECT SHIFT SOLENOID VALVE DSL
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Dsl)

  1. Remove the shift solenoid valve DSL.

  1. Measure the resistance between the solenoid valve terminal and solenoid valve body.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Solenoid Connector (DSL) - Solenoid Body (DSL)
    		20°C (68°F)
    		11 to 13 Ω

  1. Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating sound.

    OK:
    Valve moves and makes operating sound.


NG
REPLACE SHIFT SOLENOID VALVE DSL (RAV4_ACA30 RM0000027NY00CX.html)
OK


5.CHECK TRANSMISSION WIRE
OK:
The connectors and pins are securely installed.
There is no open or short on the wire harness.


NG
REPAIR OR REPLACE TRANSMISSION WIRE (RAV4_ACA30 RM000001SU1017X.html)
OK


6.INSPECT TRANSMISSION VALVE BODY ASSEMBLY

  1. Check the transmission valve body assembly.

    OK:
    There are no foreign objects on each valve.


NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY (RAV4_ACA30 RM000001SU5018X.html)
OK


7.INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

  1. Check the torque converter clutch assembly (RAV4_ACA30 RM000001GS000WX.html).

    OK:
    The torque converter clutch operates normally.


NG
REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY (RAV4_ACA30 RM000001SUM00YX.html)
OK

REPAIR AUTOMATIC TRANSAXLE ASSEMBLY (RAV4_ACA30 RM000001SUM00YX.html)