GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
1999
🢒
Eldorado
🢒
Transmission/Transaxle
🢒
Automatic Transaxle - 4T80-E
🢒 Transmission Fluid Pressure Manual Valve Position Switch Logic
TFP Manual Valve Position Switch Logic
Range Signal
A
B
C
PARK
OFF
ON
OFF
REVERSE
ON
ON
OFF
NEUTRAL
OFF
ON
OFF
D4
OFF
ON
ON
D3
OFF
OFF
ON
D2
OFF
OFF
OFF
D1
ON
OFF
OFF
Illegal
ON
OFF
ON
Illegal
ON
ON
ON
ON = 0 volts
OFF = B+ volts