Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

The transmission fluid pressure (TFP) switch 5 assembly is part of the control solenoid valve assembly which has no serviceable components. The transmission control module (TCM) supplies a signal circuit to the TFP switch 5. The TFP switch 5 has an internal case ground. TFP switch 5 is normally closed, or Low. When oil pressure is present at the TFP switch 5, the switch is open, or High. The normally high clutch pressure control (PC) solenoid 3 controls pressure to the R1/4-5-6 clutch regulator valve. The TCM monitors the TFP switch 5 to determine the position of the R1/4-5-6 clutch regulator valve. When the low and reverse clutch and 4-5-6 clutch are commanded OFF, pressure is present on the TFP switch 5. When the low and reverse clutch or 4-5-6 clutch is commanded ON, the R1/4-5-6 clutch regulator valve moves and pressure to the TFP switch 5 is exhausted through the R1/4-5-6 clutch regulator valve.