P0711-TRANSMISSION TEMPERATURE SENSOR PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
The temperature sensor is used to sense the temperature of the transmission fluid. Transmission fluid temperature can affect shift quality, torque converter operation and when or if some diagnostics
are run. A failed temperature sensor could affect the OBD diagnostics. If a problem occurs in the transmission temperature sensor circuit, transmission temperature will be based on a calculated value.
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When Monitored:
Continuously with the ignition on and engine running.
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Set Condition:
DTC will set when the transmission temperature does not reach a normal operating temperature within a given time frame. Time is variable due to ambient temperature. Approximate DTC set time is 10
to 35 minutes. The following are starting temperature to warm up times to set this DTC: starting temperature -40 degrees C (-40 degrees F) warm up time 35 minutes, starting temperature -28 degrees C ( -20 degrees
F) 25 minutes, starting temperature -6.6 degrees C (20 degrees F) 20 minutes, starting temperature 15.5 degrees C (60 degrees F) 10 minutes. When the fault is set, calculated temperature is substituted for measured
temperature, however the DTC is stored only after three consecutive occurrences.
Possible Causes
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RELATED TRANSMISSION TEMPERATURE DTC'S PRESENT
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TRANSMISSION TEMPERATURE SENSOR
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POWERTRAIN CONTROL MODULE
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Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC
- 42RLE - STANDARD PROCEDURE)
Diagnostic Test
1.
DETERMINE IF RELATED TRANSMISSION TEMPERATURE DTCS ARE PRESENT
With the scan tool, check Transmission DTCs.
Are there any other Transmission Temperature Sensor related DTCs present?
Yes
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Refer to the Transmission category and perform the appropriate diagnostic procedure.
No
2.
CHECK TO SEE IF DTC IS ACTIVE
With the scan tool, view DTCs.
Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?
Yes
No
3.
PCM AND WIRING
Turn the ignition off to the lock position.
Remove the Ignition Switch Feed fuse from the TIPM.
CAUTION:
Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.
WARNING:
The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in personal injury or death.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit.
Ignition on, engine not running.
With the Transmission Simulator, turn the Input/Output switch to OFF.
With the scan tool, monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator.
Compare the scan tool readings with the numbers listed on the Transmission Simulator.
Do the readings on the Transmission Simulator match the scan tool readings +/- 0.2 volts?
Yes
No
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Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to
all power and ground circuits. Check for any Service Bulletins and for any possible causes that may apply. If no problems are found, replace and program the PCM per the Service Information. With the scan
tool, perform QUICK LEARN.
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Perform 42RLE TRANSMISSION VERIFICATION TEST.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
4.
INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorted and open circuits.
With the scan tool, check the DTC EVENT DATA to help identify the conditions in which the DTC was set.
Were there any problems found?
Yes
No