Shift Solenoid Valve: Solenoid 1,2

Fig 1: View Of Automatic Transaxle Input Speed Sensor (A/T ISS)

Courtesy of SUZUKI OF AMERICA CORP.

The shift solenoids are two identical, normally open electronic exhaust work that control upshifts and downshifts in all forward gear ranges. These shift solenoids valves together in a combination of ON and OFF sequences to control the line pressure and shift mechanisms (clutches, brakes).

Solenoid 1 controls the high or low of the line pressure (flow to each clutch valve) by the operation type (ON/OFF), i.e. solenoid 1 is ON, line pressure will be low (87 ~ 116 psi (6 ~ 8 bar)), solenoid 1 is OFF, line pressure will be high (232 ~ 261 psi (16 - 18 bar)).

Solenoid 2 controls the oil flow to clutch valve E or lockup clutch valve by the ON/OFF signal.

The TCM monitors numerous inputs to determine the appropriate solenoid state combination and transaxle gear for the vehicle operating conditions.