9-3 FWD (9440) L4-2.0L Turbo (B207R) (2009)
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Solenoid Valve SLT, TCM AF 40 (531)
Location
The solenoid valve is mounted in the gearbox valve housing.
Main use
The valve controls the gearbox system pressure. The value is controlled so that it is not higher than what is currently needed for any friction element.
Brake B2 does not have its own pressure control valve and is therefore supplied by SLT.
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 3 in the connector that
makes contact directly with the gearbox on the bottom of the control module. The valve is grounded from pin 1. The current varies between 0- 1000mA.
The solenoid is normally open and the hydraulic pressure drops as the current increases.