Shift Solenoid Valve: Solenoid 1, 2

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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 lock-up 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.

SHIFT SOLENOID VALVE POSITION CHART

Gear	Solenoid 1	Solenoid 2
Park, Neutral	ON	ON
First	ON/OFF	ON
Second	ON/OFF	OFF
Third	ON/OFF	OFF
Fourth	ON/OFF	OFF
Reverse	ON/OFF	ON

RESISTANCE REFERENCE CHART

	Line Pressure	Resistance
Solenoid valve 1 / Solenoid valve 2	ON (low) 89.9 - 98.6 psi (6.2 - 6.8 bar) OFF (high) 221.9 - 253.24 psi (15.3 - 17.46 bar)	26.5 ± 0.5 Ω

Fig 1: Sectional View Of Shift Solenoid Valve

Courtesy of SUZUKI OF AMERICA CORP.