Circuit/System Description

Pressure control solenoid Valve 3 is part of the control solenoid valve assembly, which has no serviceable components. Pressure control solenoid Valve 3 regulates transmission fluid pressure to the R1/4-5-6regulator valve which controls pressure to the reverse and low clutch and the 4-5-6clutch. The transmission control module (TCM) calculates gear ratio based on the speed signals from the automatic transmission input shaft speed sensor and the output shaft speed sensor. The TCM compares the expected transmission gear ratio to the calculated gear ratio for each commanded gear.