Le Hardsoft

Introduction

Three linear solenoids ( PWM)

1.  SLT = The line pressure control solenoid maintains consistent pressure for proper transaxle operation.

2. SLS = The shift pressure control solenoid maintains shift feel by controlling the hydraulic pressure for the application, or release, of the friction components. (This is a part of the transaxle adaptive functions.)

3. SLU = The torque converter clutch lock-up pressure control solenoid controls the apply and release pressure of the torque converter clutch, and the low and reverse clutch during low range first gear operation.

Five Shift Solenoids ( On Off )

The function of the five shift solenoids is to apply and release the clutch packs by locking-up the planetary gear sets in order to achieve different gear ratios.

• S1 = Reverse, First Shift Solenoid Valve, : NO
• S2 =  2-3, 3-4 Shift Solenoid Valve, : NO
• S3 = 1-2, 2-3 Shift Solenoid Valve, : NC
• S4 = 3-4, 4-5 Shift Solenoid Valve,  : NO
• S5 = Reverse Shift Solenoid Valve, :  NC  (ON) during 2-3 and 3-4 shifts

Chgt  Solenoid

N>1 : S1 S3

1>2 : S1 S2

2>3 : S4

3>4 : S3

4>5 : S2

N>R : S3 S5

10 psi = 0.7 bar

DTC  = Diagnostic trouble codes

TCC = Torque converter clutch

TCM = Transmission Control Module

Transmission Range (TR) Switch

MIL =

Input Shaft Speed (ISS)

Output Shaft Speed (OSS

Transmission Fluid Temperature (TFT)