K313 CVT CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM P071011 Transmission Fluid Temperature Sensor "A" Circuit Short To Ground
DESCRIPTION
The CVT fluid temperature sensor converts the CVT fluid temperature into a resistance value for use by the ECM.
The sensor resistance changes with the CVT fluid temperature. As the temperature rises, the sensor resistance decreases. The ECM applies voltage to the temperature sensor through ECM terminal THO1 and calculates the fluid temperature based on the voltage signal.
- HINT:
-
The CVT fluid temperature is likely to increase under conditions such as towing, climbing hills and in traffic.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P071011 | Transmission Fluid Temperature Sensor "A" Circuit Short To Ground | When the battery voltage is 8 V or more and the ignition switch is ON, the CVT fluid temperature sensor voltage is less than 0.142 V for 0.5 seconds. (1-trip detection logic) | ·
Wire harness or connector ·
Transmission wire (CVT fluid temperature sensor) ·
ECM |
Comes on | DTC stored | SAE Code:
P0712 |
MONITOR DESCRIPTION
The CVT fluid temperature sensor converts the CVT fluid temperature to an electrical resistance value. Based on the resistance, the ECM determines the CVT fluid temperature and can detect a short to ground in the CVT fluid temperature circuit. If the resistance value of the CVT fluid temperature is less than 79 Ω*, the ECM interprets this as a malfunction of the CVT fluid temperature sensor or wiring, illuminates the MIL and stores a DTC.
*: 150°C (302°F) or more is indicated regardless of the actual CVT fluid temperature.
- HINT:
-
The CVT fluid temperature can be checked in the Data List.
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the GTS on.
Wait for 3 seconds or more with the ignition switch ON. [*1]
- HINT:
-
[*1]: Normal judgment procedure.
-
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P071011.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
| N/A | ·
Unable to perform DTC judgment ·
Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Perform the universal trip to clear permanent DTCs.
·Perform initialization when parts related to the continuously variable transaxle system are replaced.
·Check that no DTCs are stored after performing initialization.
PROCEDURE
Warm up the engine.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Transmission / Data List.
According to the display on the GTS, read the Data List.
- Powertrain > Transmission > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note A/T Oil Temperature No.1 CVT fluid temperature sensor value Min.: -40°C (-40°F)
Max.: 150°C (302°F)
or Invalid Value·Approximately 100°C (212°F): After stall speed test
·Equal to ambient temperature: After cold soak
If the value is -40°C (-40°F) or 150°C (302°F) or more, the CVT fluid temperature sensor circuit is open or shorted.
- Powertrain > Transmission > Data List
-
Tester Display A/T Oil Temperature No.1 - 50003 373 180
- Result:
Result Proceed to Data List value is not normal A Data List value is normal B
A
B
| *a | Component without harness connected
(Transmission Wire) |
Disconnect the C60 transmission wire connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 1 (OIL) - 7 (E2) Always 79 Ω to 156 kΩ 1 (OIL) - Body ground and other terminals Always 10 kΩ or higher 7 (E2) - Body ground and other terminals Always 10 kΩ or higher
- HINT:
-
If the resistance is out of the specified range at any of the CVT fluid temperatures shown in the table below, the driveability of the vehicle may decrease.
CVT Fluid Temperature Specified Condition 10°C (50°F) 5.6 to 7.3 kΩ 25°C (77°F) 3.5 kΩ 110°C (230°F) 0.22 to 0.27 kΩ
Connect the C60 transmission wire connector.
- Result:
Proceed to OK NG
OK
NG
Disconnect the C78 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C78-84 (THO1) - C78-83 (ETHO) Always 79 Ω to 156 kΩ C78-84 (THO1) - Body ground and other terminals Always 10 kΩ or higher C78-83 (ETHO) - Body ground and other terminals Always 10 kΩ or higher
Connect the C78 ECM connector.
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to NEXT
NEXT