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Home >> Subaru >> 2002 >> Impreza RS, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (Mechanism & Function) >> Electrohydraulic Control System >> Output Signals

Output Signals

OUTPUT SIGNALS CHART

Signal name Function
Shift solenoid 1, 2 Each of these signals controls shift step by turning the corresponding solenoid ON/ OFF. Activating timing is controlled for each solenoid to reduce shift shock.
Line pressure duty solenoid Regulates the line pressure according to driving conditions.
Lock-up duty solenoid Regulates the hydraulic pressure of the lock-up clutch to operate it in three modes (open, smooth and lock-up).
Transfer duty solenoid Regulates the hydraulic pressure of the transfer clutch to control the driving force to the rear drive shaft.
AT OIL TEMP light Causes the light to illuminate when ATF becomes excessively hot (exceeds a set temperature level). This light is also used for on-board diagnostics.
2-4 brake duty solenoid Regulates 2-4 brake operating pressure to reduce shifting shocks.
2-4 brake timing solenoid Switches on or off the pressure acting on 2-4 brake timing valve B to control the release timing of the 2-4 brake.
Low clutch timing solenoid Switches on or off the pressure acting on the low clutch timing valve B to control the release timing of the low clutch. Also switches on or off the pressure acting on the reverse inhibit valve to control the reverse inhibit function.
Torque control signal 1 Reduces engine torque during range selection and gear change.
Torque control signal 2 Reduces engine torque during range selection and gear change.