Shift lever lock systems are adopted to prevent mis-operation of the shift lever. With this mechanism, when the shift lever is in the “P” range, the shift lever cannot move unless the ignition key is in the ON position and the brake pedal is depressed. Also, when the shift lever is not in the “P” range, the ignition key cannot be turned from ON or ACC to LOCK and the ignition key cannot be removed. There is a release button for manually canceling the shift lock mechanism if the battery is dead.
2. Components
The shift lever section includes the shift lock plate, shift lock link, shift lock solenoid, shift lock computer, and shift lock release button. The key cylinder section comprises such parts as the lock pin and cam. The lock pin is connected to the shift lock plate via the parking lock cable.
HINT:
Some models eliminate the parking lock cable and control with a solenoid valve.
3. Operation
(1) Shift lever lock mechanism When the shift lever is in the “P” range, unless the ignition key is in the ON position and the brake pedal is depressed, no current flows to the shift lock solenoid, so the shift lever cannot be moved. When shift lock plate moves to the release side by the shift lock solenoid, the shift lever can be moved when pushing the shift lever knob button, the shift lock pin is pushed down and shift lock link moves downward.
(2) Key interlock mechanism When pushing the shift lever knob button, the shift lock pin is pushed down and the shift lock link moves downward. When the shift lever is moved to the ranges except ÅgPÅh range, the shift lock link is fixed at the lock position. And the key cylinder side lock pin is fixed on the lock side. The effect is that unless the shift lever is moved to the “P” range, the ignition key cannot be turned from ON or ACC to LOCK and the ignition key cannot be removed.
Control of ECT
The Engine & ECT ECU controls gear shift timing and lock-up by controls to the solenoid valves of the hydraulic control unit to maintain the optimal driving condition using the signals from the sensors and switches mounted on the engine and automatic transaxle. In addition, the ECU is provided with diagnosis and fail-safe functions when a sensor, etc., fails.
HINT:
The current ECU is an integration ofthe Engine ECU and ECT ECU, butpreviously it was separated.