Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Sl). Corolla ZZE150

Трансмиссия. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Автоматическая Трансмиссия U341E. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

ОПИСАНИЕ СИСТЕМЫ

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)

INSPECT SHIFT SOLENOID VALVE SL

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

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


ОПИСАНИЕ СИСТЕМЫ

The ECM uses the signals from the throttle position sensor, airflow meter, turbine (input) 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 a mechanical problems of the shift solenoid valve SL, valve body and torque converter clutch or automatic transaxle (clutch, brake or gear etc.).

DTC No.
DTC Detection Condition
Trouble Area
P0741
  1. 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)
  2. When lock-up is ON, clutch or brake slips or gear is broken. (2-trip detection logic)
  1. Shift solenoid valve SL remains open or closed
  2. Valve body is blocked
  3. Shift solenoid valve SL
  4. Torque converter clutch
  5. Automatic transaxle (clutch, brake or gear etc.)
  6. Line pressure is too low

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the airflow meter and the crankshaft position sensor, the ECM sends a signal to the shift solenoid valve SL to regulate the hydraulic pressure and provide smoother gearshifts. The shift solenoid valve SL responds to commands from the ECM. The valve controls the lock-up relay valve to perform torque-converter lock-up and flexible lock-up functions.
The ECM compares the engine rpm (NE) signal and the input turbine speed signal to detect torque converter lock-up. The ECM then compares the lock-up status against the lock-up schedule in the ECM memory. If the ECM does not detect lock-up at the appropriate time, it will conclude that there is a malfunction of shift solenoid SL. The ECM will illuminate the MIL.

INSPECTION PROCEDURE

УКАЗАНИЕ:
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.

PERFORM ACTIVE TEST

  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 (IG).

  5. Turn on the tester.

  6. Select the item "Enter / Powertrain / Engine and ECT / Active Test".

  7. According to the display on the tester, perform the "Active Test".

    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Activate the Lock Up
    		[Test Details]
    Control the shift solenoid SL to set the automatic transaxle to the lock-up condition.
    [Vehicle Condition]
    1. Throttle valve opening angle: Less than 35%
    2. Vehicle Speed: 58 km/h (36 mph) or more, and 4th gear
    		ON/OFF
    		Possible to check the SL operation.
    УКАЗАНИЕ:
    1. This test can be conducted when the vehicle speed is 58 km/h (36 mph) or more.
    2. This test can be conducted in the 3rd or 4th gear.


  8. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

    УКАЗАНИЕ:
    1. When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.
    2. Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will close the throttle valve and lock-up may be turned off.)

    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Sl)

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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the intelligent tester main switch on.

  1. When you use intelligent tester:
    Select the item "Powertrain / Engine and ECT / DTC / Current or Pending".

  1. Read the DTCs using the intelligent tester.

    Result:

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


B
GO TO DTC CHART (Нажмите здесь)
A


2.INSPECT SHIFT SOLENOID VALVE SL


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0741 Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve Sl)

  1. Remove the shift solenoid valve SL.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Solenoid Connector (SL) - Solenoid Body (SL)
    		20°C (68°F)
    		11 to 15 Ω

  1. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

    OK:
    The solenoid valve makes an operating sound.


NG
REPLACE SHIFT SOLENOID VALVE SL (Нажмите здесь)
OK


3.INSPECT TRANSMISSION VALVE BODY ASSEMBLY
OK:
There are no foreign objects on each valve and they operate smoothly.


NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY (Нажмите здесь)
OK


4.INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY
OK:
The torque converter clutch operates normally.


NG
REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY (Нажмите здесь)
OK

REPAIR AUTOMATIC TRANSAXLE ASSEMBLY (Нажмите здесь)