Lockup Control: Notes

• By engaging the lockup clutch in the torque converter, the slip in the torque converter is eliminated and power is transmitted more effectively.
• Based on signals from the TCM, the lockup solenoid is controlled in order to let the lockup control valve operate and adjust apply pressure/release pressure, to consequently vary the lockup clutch engagement force.

Lockup operation conditions

Fig 1: Gear Position Chart

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Flow Chart Of Lockup Control

Courtesy of SUBARU OF AMERICA, INC.