Solenoid Valve SLU, TCM AF 40 (531)

Solenoid valve SLU, TCM AF 40 (531)

Location
The solenoid valve is mounted in the gearbox valve housing.

Main use
The valve controls the pressure used for the torque converter clutch. The pressure is modulated so that full, partial or no engagement is achieved.

Type
Electromagnetic, variable PWM controlled.





Activation
The control module activates the valve by pulsing it with B+ (300 Hz PWM). The valve is powered from control module pin 9 in the connector that makes contact directly with the gearbox on the bottom of the control module. The valve is grounded from pin 4. The current varies between 0 - 1000 mA. The solenoid is normally closed and the hydraulic pressure rises as the current increases.