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Transmission Fluid Pressure Switch Logic

Transmission Fluid Pressure Switch Logic

Transmission Fluid Pressure (TFP) Switch Logic
Gear
TFP SW 1 *TFP SW 3 TFP SW 4 TFP SW 5
Park High Low Low High
Engine Start High High Low High
Reverse - Output Split (Engine OFF) High High High High
Reverse - Output Split (Engine ON) High Low High High
Reverse - Series Mode (Engine OFF) High Low Low Low
Reverse - Series Mode (Engine ON) High High Low Low
Neutral High Low Low High
Drive - Series Mode (Engine OFF) High Low Low Low
Drive - Series Mode (Engine ON) High High Low Low
Drive - Output Split (Engine OFF) High High High High
Drive - Output Split (Engine ON) High Low High High
Power Off - Default Low Low Low Low
High = 12V (Switch Open or Pressurized)
Low = 0 volts (Switch Closed or No Pressure)
Note: All TFP switches are normally closed (NC)
*TFP switch 2 does not exist