Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
This solenoid is located in the transmission hydraulic control valve. It is turned ON or OFF according to signals from the TCM. It then controls the
2-4 brake timing valve B to decrease the change gear shock.
N: LINE PRESSURE DUTY SOLENOID
This solenoid is located in the transmission hydraulic control valve. Its duty ratio is controlled by signals from the TCM. This solenoid then controls
the pressure modifier valve and accumulator control valve A to adjust the line pressure to an optimum pressure level suitable for operating conditions.
O: LOCK-UP DUTY SOLENOID
This solenoid is located in the transmission hydraulic control valve. Its duty ratio is controlled by signals from the TCM. It then controls the lock-up
control valve to provide smooth engagement and disengagement of the lock-up clutch.
P: 2-4 BRAKE DUTY SOLENOID
