Hydraulic Flow (cont'd)
D Position: Driving in 5th gear
The PCM turns shift solenoid valves C ON, and keeps A and D ON, and B and E OFF. Shift solenoid valve C pressure (SC) is applied to the right side of shift valve C. Shift valve C is moved to the left side to switch the port of A/T clutch pressure control solenoid valve B pressure to the 4th clutch.
The 5th clutch pressure (50) is held high by the A/T clutch pressure control solenoid valve C, and the 5th clutch is engaged securely.
NOTE: When used, ‘‘left'' or ‘‘right'' indicates direction on the hydraulic circuit.
R Position: Shifting to R position from P or N position
When shifting to the R position, the PCM turns shift solenoid valves B and E ON, and A, C, and D OFF. Shift solenoid valve B pressure (SB) is applied to the right side of the shift valve B, and the shift valve B is moved to the left side. Shift solenoid valve E pressure (SE) is applied to the left side of shift valve E, and shift valve E is moved to the right side. Line pressure (1) changes to (3) at the manual valve, and flows to the servo valve via the shift valve E. The servo valve is moved to reverse range position. Movement of the shift valves B and E, and servo valve creates 4th clutch line pressure between the 4th clutch and the A/T clutch pressure control solenoid valve A. The 4th clutch pressure (40) is applied to the 4th clutch, and the 4th clutch is engaged gently.
NOTE: When used, ‘‘left'' or ‘‘right'' indicates direction on the hydraulic circuit.