FixVault

Lock-up Control

From sensor input signals, the PCM determines whether to turn the lock-up ON or OFF, and activates lock-up control solenoid valve A and/or B accordingly. The combination of driving signals to lock-up control solenoid valves A and B and the linear solenoid pressure is shown in the table below.

LOCK-UP CONTROL SOLENOID VALVE CONDITION CHART

Lock-up Conditions Lock-up Control Solenoid Valve A Lock-up Control Solenoid Valve B Linear Solenoid Pressure
Lock-up OFF OFF OFF High
Lock-up, Half ON Duty operation OFF ↔ ON Low
Lock-up, Full ON ON High
Lock-up during deceleration ON Duty operation OFF ↔ ON Low