4/21/2023 0 Comments 88 ford thunderbird turbo coupe![]() Start the engine and place the transmission range selector in D6. ![]() The TCM freezes transmission adaptive functions.Įnsure the TFT is near the temperature displayed in the Failure Records.The TCM detects that the TFP switch 4 signal voltage remains low, 0 volts when the 1-2-3-4 clutch is commanded ON for 5.5 seconds or greater. The TCM monitors the normally closed TFP switch 4 signal circuit to determine the 1-2-3-4 clutch status. The normally low clutch pressure control (PC) solenoid 4-5 controls the transmission fluid to the 1-2-3-4 clutch. When oil pressure is present at the TFP switch 4, the switch is open, high. The TCM supplies 12 volts to the TFP switch 4 on the TFP switch 4 signal circuit the TFP switch 4 has an internal case ground. The transmission fluid pressure (TFP) switch 4 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. DTC P0877: Transmission Fluid Pressure (TFP) Switch 4 Circuit Low Voltage
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