Hummer H1 Service Manual page 252

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DTC P0711 Transmission Fluid Temperature
Sensor Circuit Range/Performance
Circuit Description
The Automatic Transmission Fluid Temperature (TFT) Sensor
is a thermistor (temperature sensitive resistor). The TFT Sen-
sor is part of the 4L80-E Automatic Transmission Wiring Har-
ness Assembly (A/T Wiring Harness Assembly). The TFT
Sensor receives a 5-volt reference signal from the Powertrain
Control Module (PCM) on circuit 1227. When the fluid tem-
perature is low, the TFT Sensor has a high resistance and the
PCM detects a high voltage on circuit 1227. As fluid tempera-
ture rises, the TFT Sensor resistance gradually decreases and
the PCM senses a lower voltage on circuit 1227.
If the PCM detects no change in the TFT sensor resistance or
unrealistic changes in a short amount of time in the TFT sensor
resistance (multiple changes within seconds), then DTC P0711
sets. DTC P0711 is a type D DTC. For California emissions
vehicles, DTC P0711 is a type B DTC.
05745159
TORQUE
CONVERTER
PRESSURE
CLUTCH
CONTROL
SOLENOID
SOLENOID
(TCC)
(PCS)
D C
C34
C32-F C32-E
C32-G
C27-C15 C27-C7 C28-C5
PCS PCS TCC PWM
LOW HIGH SOLENOID
CONTROL
Transmission/Transfer Case
HOT IN RUN
AND START
FUSE 2A
10A
EXTERIOR
C33-F
C34-E
1-2 SHIFT
SOLENOID
(1-2)
2-3 SHIFT
SOLENOID
(2-3)
S B A
C32-D C32-C
C28-C6 C28-C4
2-3 SS 1-2 SS
CONTROL CONTROL
POWERTRAIN
CONTROL
MODULE
(PCM)
TRANSMISSION
FLUID
TEMPERATURE
SENSOR
(TFT)
M L
C32-J C32-H
C29-B12 C27-C9
SENSOR TFT
GROUND SENSOR
SIGNAL
9-S12-071
5-53