Pattern Select Switch Circuit CIRCUIT DESCRIPTION The ECM memory contains the shift programs for the NORMAL and MANUAL patterns, 2 position, and L position and the lock–up patterns. Following the programs corresponding to the signals from the pattern select switch, the park/neutral position switch and other various sensors the ECM switches the solenoid valves ON and OFF, thereby controlling the transmission gear change and the lock–up clutch operation. WIRING DIAGRAM Combination Meter 12 W-L 38 25 M1 II1 W-L E10 ECM B+ Pattern Select Switch W-B 3 MANU 4 12 18 IJ2 G-Y E10 M NORM G-Y IE INSPECTION PROCEDURE 1 Check A/T fluid temp. sensor. (See page AT1–64). OK NG Replace A/T fluid temp. sensor. Go to 2 .