Description
The TCM calculates the best condition using information from all kinds of sensors. If the solenoid valve receives information on the oil pressure, it actuates according to the driving signal. All kinds of regulators in the valve body are controlled by the TCM to change the oil passage and line pressure.
Scheme 171
- PWM (Pulse Width Modulation) Solenoid Valve
Structure and functions
The PWM solenoid valve is composed of five solenoid valves, and the oil capacity in the solenoid valve is changed by an electric duty value of the TCM. The oil pressure of the valve body and the torque converter engages or disengages the damper clutch. The solenoid valves send the operating oil pressure to the clutches and brakes at each range, and also control the strength and weakness of oil pressure to reduce shock when shifting.
Scheme 172
Scheme 173
PWM (Pulse Width Modulation) solenoid
| Range | PWM solenoid valve (0 : Duty 0%) | |||||
|---|---|---|---|---|---|---|
| SCSV-A (LR) | SCSV-B (UD) | SCSV-C (2ND) | SCSV-D (OD) | SCSV-E (RED) | SCSV | |
| 1st | O | O | X | O | X | X |
| 2nd | O | X | X | O | X | O |
| 3rd | O | O | X | X | X | O |
| 4th | O | X | O | X | X | O |
| 5th | X | X | O | X | O | O |
| Reverse | X | X | O | O | X | X |
| N, P | X | O | O | O | X | X |
| O : ON X : OFF | ||||||
PWM SOLENOID VALVE RANGE
Scheme 174
PWM (Pulse Width Modulation) Solenoid Valve Control Feature
Oil pressure range
0~4.3 kgf/cm 2 (0~422kpa, 0~61.2psi)
| Type | 3way & Normal High |
|---|---|
| Input voltage | 12V |
| Coil resistance | 3.2±0.2ohms (at 25°C, 77°F) |
| Cycle | 50Hz |
VOLTAGE SPECIFICATION
Scheme 175
Scheme 176
Scheme 177
Scheme 178
- Remove the battery terminal.
- Lift the vehicle.
- Remove the under cover.
- Loosen the drain plug and drain the transaxle oil.
- Remove the oil pan.
- Remove the oil filter.
- Remove the valve body.
- Disconnect the main harness (A) from valve body.
- Remove the solenoid valve assembly (A).
Scheme 179
- Install the solenoid valve. CAUTION: Apply the ATF oil or White Vaseline to the O-ring to prevent damage.
- Connect the solenoid valve connector to the valve body. CAUTION: When connecting the solenoid valve connector, check the connector for rust, dirt, or oil, then clean and reconnect it.
- Install the valve body. Tightening torque: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Install the oil filter. Tightening torque: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Continue to apply liquid gasket at application points at the oil pan with ø2.5mm (0.098in) thickness. Liquid gasket Part name: Threebond 1281B
- Tighten the mounting bolt with the specified torque after installing the oil pan. Tightening torque: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Install the drain plug. Tightening torque: 40~50Nm (4.0~5.0kgf.m, 28.9~36.2lb-ft)
- Installation is the reverse of the removal.
The VFS valve controls the regulator valve and varies the line pressure from 4.5 bar to 10.5 bar, according to the throttle open angle and the shift range. The holder is installed on the upper side of the case, and a filter is installed on the outside of the holder to prevent any debris from flowing into the VFS.
Scheme 180
Scheme 181
PWM solenoid valve is linear controlled according to the current value.
| Type | 3way & Normal High |
|---|---|
| Input voltage | 12V |
| Coil resistance | 3.5±0.2ohms(at 25°C, 77°F) |
| Operating current | 0 ~ 1200 mA |
VOLTAGE SPECIFICATION