P0711

U241E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0711: Transmission Fluid Temperature Sensor "A" Performance

DTC P0711 - Transmission Fluid Temperature Sensor "A" Performance

DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.






MONITOR DESCRIPTION

This DTC indicates that there is a problem with output from the ATF temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, detects open or short circuits of the ATF temperature circuit, and detects faults in the ATF temperature sensor.
- Condition A (2-trip detection logic):
First, the ECM checks for the following conditions:
1. 17 minutes or more after the engine is started and after 9 km (5.6 miles) or more of driving, the ECT is -15°C (5°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT and IAT are -10°C (14°F) or more.

If the conditions are met, the ECM then checks if the ATF temperature is less than 20°C (68°F). If so, the ECM interprets this as a fault and illuminates the MIL.
- Condition B (2 -trip detection logic):
First, the ECM checks for the following conditions:
1. ECT is 60°C (140°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT is less than 35°C (95°F).

If the conditions are met, the ECM then checks if the ATF temperature is 100°C (212°F) or more. If so, the ECM interprets this as a fault and illuminates the MIL.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All:





Condition (A):





Condition (B):





TYPICAL MALFUNCTION THRESHOLDS

Condition (A):





Condition (B):





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: According to the DATA LIST displayed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.
NOTE: In the table below, the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

1. READ DATA LIST
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Turn on the tester.
(f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST".
(g) According to the display on the tester, read the "DATA LIST".





HINT: When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150°C (302°F), there is a short circuit.
When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40°C (-40°F), there is an open circuit.
Measure the resistance between terminal THO1 (THO) and body ground.





HINT: If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.

PROCEDURE

1. CHECK CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)
(a) Connect the OBD II scan tool or the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the OBD II scan tool or the intelligent tester main switch ON.
(c) When you use intelligent tester:
Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".
(d) Read the DTCs using the OBD II scan tool or the intelligent tester.
Result:





HINT: If any other codes besides "P0711" are output, perform troubleshooting for those DTCs first.

B -- GO TO GO TO DTC CHART
A -- Continue to next step.
2. CHECK TRANSMISSION FLUID LEVEL
OK:
Automatic transmission fluid level is correct.
NG -- ADD FLUID
OK -- REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)