Veracruz FWD V6-3.8L (2009)
Shift Solenoid: Description and Operation
Description
Solenoid Location
Function Of Each Solenoid
1. 3-way solenoids (S1,S2)
The 3-way solenoids (S1, S2) are installed on the front valve body. The solenoids turn ON and OFF in response to signals output from the TCU.
According to the ON or OFF status of S1 or S2, the 1st gear engine brake operates or a gear shift occurs. As a fail-safe function, if any shift
solenoid abnormality occurs, the TCU will disable the current to the solenoids.
2. Shift control solenoids (SLC1, SLC2, SLC3, SLB1)
The shift control solenoids (SLC1, SLC2, SLC3, SLB1) are installed on the front valve body. The solenoids linearly control hydraulic pressure in
response to signals output from the TCU. Through this, it controls hydraulic pressure to the clutches (C1, C2, C3) and brake (B1) for smooth
shifting. According to each shift control solenoid, the transaxle shifts from 1st gear into 6th gear and vice versa. As a fail-safe function, if any shift
control solenoid occurs, the TCU will shut off the current to the solenoids.
3. Line pressure control solenoid (SLT)
The line pressure control solenoid (SLT) is installed on the front valve body. In accordance with the value decided in the TCU based on throttle
opening signals and engine torque, line hydraulic pressure is controlled by linearly changing the comparable throttle pressure. Through this, The
TCU controls hydraulic pressure to the clutch and brakes for smooth shifting. As a fail-safe function, if any abnormality occurs in the line pressure
control solenoid (SLT), then the TCU will shut off the current to the line pressure control solenoid. (The line pressure is maximized, If the line
pressure control solenoid current is shut off when any abnormality of the SLT other than valve stuck occurs.)
4. Lock-up control solenoid (SLU)
The lock-up control solenoid (SLU) is installed on the front valve body. It linearly controls lock-up clutch hydraulic pressure based on engine rpm,
throttle opening degree signals, input speed sensor (NIN) signals, and output speed sensor (SP) signals. This results in control of lock-up. As a
fail-safe function, if any abnormality occurs in the lock-up control solenoid (SLU), then the TCU will shut off the current to the solenoid.
Specification Of Each Solenoid
3-way Solenoid (S1,S2)
Shift Control Solenoid
