Tacoma Extra Cab 4WD L4-2.7L (3RZ-FE) (1999)
Transmission Mode Switch: Description and Operation
CIRCUIT DESCRIPTION
The ECM memory contains the shift programs for the NORMAL and POWER patterns, 2 position, L position and the lock-up patterns. Following the
programs corresponding to the signals from the pattern select switch, the park/neutral position and other various sensors, the ECM switches the solenoid
valves ON and OFF, and controls the transmission gear change and the lock-up clutch operation.