- After stall test: Approximately 80°C (176°F)
- With engine cold: Equal to ambient temperature
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Drivetrain | Section: Automatic Transmission/Transaxle | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000000W7Z06QX |
| Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
P0711 |
Transmission Fluid Temperature Sensor "A" Performance |
DESCRIPTION
Refer to DTC P0710
.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P0711 |
Either of the following conditions (A) or (B) is met: Condition (A) Both (a) and (b) are detected (2-trip detection logic): (a) The intake air and engine coolant temperatures are higher than -10°C (14°F) at engine start. (b) After normal driving for 21 min. and 40 sec. or more and 9 km (5.6 miles) or more, the ATF temperature is below 20°C (68°F). Condition (B) Both (a) and (b) are detected (2-trip detection logic): (a) The engine coolant temperature is below 35°C (95°F) at engine start. (b) The ATF temperature is 105°C (221°F) or higher when the engine coolant temperature reaches 60°C (140°F). |
No. 1 transmission wire (No. 1 ATF temperature sensor) |
MONITOR DESCRIPTION
This DTC indicates that there is a problem with the signal from the Automatic Transmission Fluid (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 and detects an open or short in the ATF temperature circuit or a fault in the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after running the vehicle for a certain period, the ECM interprets this as a fault, and turns on the MIL.
MONITOR STRATEGY
|
Related DTCs |
P0711: ATF temperature sensor/Rationality check |
|
Required sensors/Components |
ATF temperature sensor |
|
Frequency of operation |
Continuous |
|
Duration |
3 sec. |
|
MIL operation |
2 driving cycles |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
The monitor will run whenever the following DTCs are not stored |
None |
|
ATF temperature sensor "A" circuit |
Not circuit malfunction |
|
ECT (Engine Coolant Temperature) sensor circuit |
Not circuit malfunction |
|
IAT (Intake Air Temperature) sensor circuit |
Not circuit malfunction |
Condition (A)
|
Duration time from engine start |
8 min. and 20 sec. or more |
|
Time after engine start |
8 min. and 20 sec. |
|
Driving distance after engine start |
3.4 km (2.1 miles) or more |
|
IAT (12 sec. after engine start) |
-10°C (14°F) or higher |
|
ECT (12 sec. after engine start) |
-10°C (14°F) or higher |
Condition (B)
|
Duration time for ECT to reach 60°C (140°F) |
10 sec. or more |
|
ATF temperature (12 sec. after engine start) |
105°C (221°F) or higher |
|
ECT (12 sec. after engine start) |
Below 35°C (95°F) |
TYPICAL MALFUNCTION THRESHOLDS
Condition (A)
|
ATF temperature |
Below 20°C (68°F) (ATF temperature = -10°C (14°F) at engine start) (Conditions vary with ATF temperature at engine start) |
Condition (B)
|
ATF temperature |
105°C (221°F) or higher |
COMPONENT OPERATING RANGE
|
ATF temperature |
20°C (68°F) or higher (ATF temperature = -10°C (14°F) at engine start) (Conditions vary with ATF temperature at engine start) |
|
ATF temperature |
Below 105°C (221°F) |
WIRING DIAGRAM
Refer to DTC P0710
.
INSPECTION PROCEDURE
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the engine switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the engine switch on (IG).
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List.
(g) According to the display on the Techstream, read the Data List.
Engine and ECT
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
A/T Oil Temperature 1 |
No. 1 ATF temperature sensor value/ Min.: -40°C (-40°F) Max.: 215°C (419°F) |
|
If the value is -40°C (-40°F) or 215°C (419°F), the No. 1 ATF temperature sensor circuit is open or shorted. |
HINT:
When DTC P0712 is stored and the Techstream output is 150°C (302°F) or higher, there is a short circuit.
When DTC P0713 is stored and the Techstream output is -40°C (-40°F), there is an open circuit.
Check the temperature displayed on the Techstream in order to check if a malfunction exists.
|
Temperature Displayed |
Malfunction |
|---|---|
|
-40°C (-40°F) |
Open circuit |
|
150°C (302°F) or higher |
Short circuit |
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately stored (in 0.5 seconds). When P0713 is stored, P0711 cannot be stored. It is not necessary to inspect the circuit when P0711 is stored.
PROCEDURE
|
1. |
CHECK DTC OUTPUT (IN ADDITION TO DTC P0711) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result
|
Result |
Proceed to |
|---|---|
|
Only P0711 is output |
A |
|
P0711 and other DTCs are output |
B |
HINT:
If any other codes besides P0711 are output, perform troubleshooting for those DTCs first.
|
|
2. |
CHECK TRANSMISSION FLUID LEVEL |
(a) Check the transmission fluid level
.
OK:
Automatic transmission fluid level is correct.
|
|
|