P0711
DTC P0711 TRANSAXLE FLUID TEMPERATURE SENSOR RATIONALITYCOMPONENT LOCATION:
GENERAL DESCRIPTION
The automatic transmission fluid(ATF) temperature sensor is installed in the valve body. This sensor uses a thermistor whose resistance changes according to the temperature changes. The PCM supplies a 5V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies. The automatic transmission fluid(ATF) temperature provides very important data for the PCM's control of the torque converter clutch, and is also used for many other purposes.
DTC DESCRIPTION
This DTC code is set when the ATF temperature output voltage is lower than the value generated by thermistor resistance, in a normal operating range, for approximately 1 second or longer. The PCM regards the ATF temperature as fixed at a value of 80 °C(176 °F) if this DTC is detected.
DTC DETECTING CONDITION:
SPECIFICATION:
SCHEMATIC DIAGRAM:
MONITOR SCANTOOL DATA
1. Connect Scantool to data link connector(DLC).
2. Engine "ON".
3. Monitor the "TRANSAXLE FLUID TEMPERATURE SENSOR" parameter on the scan tool.
Specification: Increasing gradually with increase in temperature
4. Does "TRANSAXLE FLUID TEMPERATURE SENSOR" follow the reference data?
YES
^ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification of vehicle repair" procedure.
NO
^ Go to "Terminal & connector inspection" procedure.
TERMINAL & CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES
^ Repair as necessary and go to "Verification of vehicle repair" procedure.
NO
^ Go to "Signal circuit inspection" procedure.
SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Disconnect the "TRANSAXLE FLUID TEMPERATURE SENSOR" connector.
3. Measure the voltage between terminal "1" "of the "TRANSAXLE FLUID TEMPERATURE SENSOR" harness connector and chassis ground.
4. Is voltage within specifications?
YES
^ Go to "Component inspection" procedure.
NO
^ Check for short to ground in harness. Repair as necessary and go to "Verification of vehicle repair" procedure.
COMPONENT INSPECTION
1. CHECK "TRANSAXLE FLUID TEMPERATURE SENSOR"
1) Ignition "OFF".
2) Disconnect the "TRANSAXLE FLUID TEMPERATURE SENSOR" connector.
3) Measure the resistance between terminals "1" and "2" of the "TRANSMISSION FLUID TEMPERATURE SENSOR".
[REFERENCE DATA]:
4) Is resistance within specifications?
YES
^ Go to "CHECK PCM" as below.
NO
^ Replace "TRANSAXLE FLUID TEMPERATURE SENSOR" as necessary and go to "Verification of vehicle repair" procedure.
2. CHECK PCM
1) Ignition "ON" & Engine "OFF".
2) Connect "TRANSAXLE FLUID TEMPERATURE SENSOR" connector.
3) Install Scantool and select SIMU-SCAN mode.
4) Simulate voltage (0 -> 5V) to "TRANSMISSION FLUID TEMPERATURE SENSOR" signal circuit.
The values are subject to change according to vehicle model or conditions.
5) Is FLUID TEMP. SENSOR signal value changed according to simulation voltage?
YES
^ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of vehicle repair" procedure.
NO
^ Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM as necessary and then go to "Verification of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Using a Scantool, clear DTC.
3. Operate the vehicle within DTC Enable conditions in general information.
4. Are any DTCs present?
YES
^ Go to the applicable troubleshooting procedure.
NO
^ System performing to specification at this time.