Torque Converter Clutch Does Not Operate Smoothly; Torque Converter Clutch Does Not Engage or Disengage

Torque converter clutch does not operate smoothly; torque converter clutch does not engage or disengage

Diagnostic Procedure:

1. Shift solenoid valve D defective

2. A/T clutch pressure control solenoid valve C defective

3. Torque converter clutch piston defective

4. Torque converter check valve defective

5. Lock-up shift valve defective

6. Lock-up control valve defective

7. Lock-up timing valve defective

8. Shift cable broken or out of adjustment

9. Connection between shift cable and transmission or shift lever is worn

10. Foreign material in separator plate orifice

Also check for:

- Check for a stored DTC, and check for loose connections.
- Inspect the shift solenoid valve D function with the HDS. A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- Inspect the A/T clutch pressure control solenoid valve C with the HDS. A/T Clutch Pressure Control Solenoid Valve C Test
- Check for a seized shift solenoid valve, and inspect the O-rings.
- Check the line pressure. A/T Pressure Test
- Inspect the A/T clutch pressure control solenoid valve body gasket, the ATF feed pipes, and the O-rings for wear and damage.
- Replace the torque converter.
- Check the torque converter check valve, the lock-up shift valve, and the lock-up timing valve in the main valve body for free movement, and check the valve springs for wear and damage.
- Check the lock-up control valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
- Check for a loose shift cable at the shift lever and the transmission control lever.
- Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.