For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 1999 🢒 Alero Export 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E/4T45-E 🢒 Transmission Fluid Pressure Manual Valve Position Switch Logic

#### TFP Manual Valve Position Switch Logic

Range Signal | A | B | C
--- | --- | --- | ---
Park/Neutral | ON | OFF | OFF
Reverse | ON | OFF | ON
D4 | ON | ON | OFF
D3 | OFF | ON | OFF
D2 | OFF | ON | ON
D1 | ON | ON | ON
Illegal | OFF | OFF | OFF
Illegal | OFF | OFF | ON
ON = 0 volts OFF = B+ volts