Torque Converter Clutch Control Solenoid Valve
Note. TCC control solenoid may also be known as TCC solenoid, lock-up solenoid or TCC lock-up solenoid.
Torque Converter Clutch (TCC) control solenoid valve is an on/off type solenoid controlled by PCM. Solenoid regulates line pressure to TCC shift valve. When TCC control solenoid is off (normally closed), line pressure in TCC control circuit is not drained. This causes TCC shift valve to move into position to allow hydraulic pressure to flow to torque converter front chamber to disable TCC engagement. When TCC control solenoid is on, line pressure to TCC shift valve is drained, shift valve spring pressure causes TCC shift valve to move into position to drain hydraulic pressure to torque converter front chamber, allowing TCC engagement.
No Torque Converter Clutch
Possible cause: burnt or slipping clutch in torque converter, TCC piston hydraulic pressure system, low line pressure, TP sensor malfunction, ECT malfunction, VSS malfunction, faulty input/turbine speed sensor, poor sensor ground, TCC solenoid valve sticking and/or faulty control valve body.
SHIFT SPEED SPECIFICATIONS
Note. For shift speed specifications, refer to appropriate illustration. (Scheme 49)- (Scheme 51).
Scheme 49
Scheme 50
Scheme 51
HYDRAULIC PRESSURE SPECIFICATIONS
Note. Line pressure specifications are approximate.
| Application & Range | Idle Pressure - psi (kg/cm 2 ) | Stall Pressure - psi (kg/cm 2 ) |
|---|---|---|
| "D", "S" & "L" | 60-78 (4.2-5.5) | 159-171 (11.2-12.0) |
| "R" | 105-147 (7.4-10.3) | 276-294 (19.4-20.7) |
HYDRAULIC PRESSURE TEST SPECIFICATIONS
Below Specifications
Engine out of tune. One-way clutch slipping within torque converter.