Hummer H2. Manual — part 2474

DTC P0711

14

Replace the TR switch, this switch is part of
the park/neutral position (PNP) switch.
Refer to Park/Neutral Position Switch
Replacement .
Did you complete the replacement?

-

Go to Step 16

-

15

Replace the PCM.
Refer to Powertrain Control Module (PCM)
Replacement in Engine Controls - 6.0L
(LQ4).
Did you complete the replacement?

-

Go to Step 16

-

16

Perform the following procedures in order to
verify the repair:

1. Select DTC.

2. Select Clear Info.

3. Drive the vehicle greater than 8 km/h (5

mph) for a short distance, then stop the
vehicle.

4. Select each transmission range: P, R, N,

D3, D2 and D1.

5. Place the transmission in PARK.

6. Select Specific DTC. Enter DTC

P0706.

Has the test run and passed?

-

Go to Step 17

Go to Step 2

17

With the scan tool, observe the stored
information, capture info, and DTC Info.
Does the scan tool display any DTCs that you
have not diagnosed?

-

Go to Diagnostic

Trouble Code (DTC)

List in Engine

Controls - 6.0L (LQ4)

System OK

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

Fig. 5: Automatic Transmission Fluid Temperature (TFT) Sensor
Courtesy of GENERAL MOTORS CORP.

Circuit Description

The automatic transmission fluid temperature (TFT) sensor is part of the automatic transmission fluid pressure
(TFP) manual valve position switch. The TFT sensor is a resistor, or thermistor, which changes value based on
temperature. The sensor has a negative-temperature coefficient. This means that as the temperature increases,
the resistance decreases, and as the temperature decreases, the resistance increases. The powertrain control
module (PCM) supplies a 5-volt reference signal to the sensor on the TFT sensor signal circuit and measures the
voltage drop in the circuit. When the transmission fluid is cold, the sensor resistance is high and the PCM

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

detects high signal voltage. As the fluid temperature warms to a normal operating temperature, the resistance
becomes less and the signal voltage decreases. The PCM uses this information to control shift quality and
torque converter clutch apply.

When the PCM detects one of the following unusual conditions, then DTC P0711 sets.

z

An unrealistically large change in transmission temperature

z

A transmission temperature which remains constant for a period of time in which a measurable amount of
change is expected

DTC P0711 is a type C DTC.

Conditions for Running the DTC

z

No VSS assembly DTCs P0502 or P0503.

z

No Transmission Component Slipping DTC P0894.

z

The engine is running for 409 seconds.

z

The engine coolant temperature (ECT) is greater than 84°C (151°F) and the temperature has changed by
54°C (97°F) since startup.

z

The vehicle speed is greater than 8 km/h (5 mph) for 409 seconds cumulative during the current ignition
cycle.

z

The TFT at startup is between -40 and +21°C (-40 and +70°F).

z

The TFT is between -38 and +151°C (-36 and +304°F).

z

The TCC slip speed is greater than 120 RPM for 409 seconds cumulative during the current ignition
cycle.

Conditions for Setting the DTC

DTC P0711 sets if one of the following conditions occurs:

Condition 1

The TFT does not change more than 2.25°C (2.7°F) for 409 seconds since startup.

Condition 2

The TFT changes more than 20°C (36°F) in 200 milliseconds 14 times within 7 seconds.

Action Taken When the DTC Sets

z

The PCM does not illuminate the malfunction indicator lamp (MIL).

z

The PCM determines a default TFT using one of the following:

IMPORTANT: The actions listed below are in order of highest to lowest priority.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

1. If any ECT DTCs P0117 or P0118 are set, then the default TFT is equal to 135°C (275°F).

2. If the ECT is 125°C (257°F) or more, then the default TFT is equal to 135°C (275°F).

3. If the engine run time is less than 300 seconds and:

z

No intake air temperature (IAT) DTCs P0112 or P0113 are set and IAT is available, then the
default TFT is equal to IAT.

z

Any IAT DTCs P0112 or P0113 are set or IAT is NOT available, then the default TFT is
equal to 90°C (194°F).

4. If the engine run time is greater than 300 seconds and no IAT DTCs P0112 or P0113 are set and

IAT is available and ECT is between 40 and 125°C (104 and 257°F) and:

z

IAT at startup is less than 15°C (59°F), then the default TFT is equal to the ECT plus 5°C (8°
F).

z

IAT at startup is greater than 35°C (95°F), then the default TFT is equal to the ECT plus 10°
C (16°F).

z

IAT at startup is between 15 and 35°C (59 and 95°F), then the default TFT is equal to the
ECT.

5. If the engine run time is greater than 300 seconds and any IAT DTCs P0112 or P0113 are set or

IAT is NOT available, then the default TFT is equal to the ECT.

6. If the engine run time is greater than 300 seconds and ECT is less than 40°C (104°F) or more, then

the default TFT is equal to 60°C (140°F).

z

The PCM freezes shift adapts from being updated.

z

The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM
stores this information as Failure Records.

z

The PCM stores DTC P0711 in PCM history.

Conditions for Clearing the DTC

z

A scan tool can clear the DTC.

z

The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-
emission-related diagnostic fault occurring.

z

The PCM cancels the DTC default actions when the fault no longer exists and/or the ignition switch is
OFF long enough in order to power down the PCM.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

5: This step tests for an intermittent short or open condition in the engine wiring harness. The test lamp is
used as a resistor in the circuit.

6: This step determines if the PCM or the TFT sensor is causing a steady, unchanging TFT reading.

DTC P0711

Value

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2