The CVT fluid temperature sensor converts the fluid temperature into a resistance value which is detected 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.
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 |
|---|---|---|---|---|---|---|
| P071000 | Transmission Fluid Temperature Sensor "A" Circuit Range/Performance | Either of the following conditions is met (2-trip detection logic):
·
The intake air and engine coolant temperatures were more than -10°C (14°F) at engine start, and the CVT fluid temperature remains below 20°C (68°F) for 3 seconds when the vehicle has been driven for over 18 minutes and 7 km (4 miles). ·
The engine coolant temperature was less than 35°C (95°F) at engine start, and the CVT fluid temperature remains 100°C (212°F) or more for 10 seconds. |
·
CVT fluid level ·
Transmission wire (CVT fluid temperature sensor) |
Comes on | DTC stored | SAE Code:
P0711 |
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnostic Condition | The intake air and engine coolant temperatures were more than -10°C (14°F) at engine start, and the vehicle has been driven for over 18 minutes and 7 km (4.0 miles). | ○ | - |
| The engine coolant temperature was less than 35°C (95°F) at engine start. | - | ○ | |
| Malfunction Condition | The CVT fluid temperature remains below 20°C (68°F). | ○ | - |
| The CVT fluid temperature remains 100°C (212°F) or more. | - | ○ | |
| Duration | 3 seconds or more | 10 seconds or more | |
| Detection Logic | 2-trip detection logic | 2-trip detection logic | |
This DTC is output when either of the above detection patterns is met.
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 detects open or short circuits in the CVT fluid temperature circuit.
After driving the vehicle for a certain amount of time, the CVT fluid temperature should increase. If the CVT fluid temperature remains below 20°C (68°F), the ECM interprets this as a malfunction, stores a DTC and illuminates the MIL.
When the engine coolant temperature reaches 35°C (95°F) after a cold engine start, if the CVT fluid temperature is 100°C (212°F) or more, the ECM interprets this as a malfunction, illuminates the MIL, and stores this DTC.
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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.
Start the engine and turn the GTS on.
Enter the following menus: Powertrain / Transmission / Data List / A/T Oil Temperature No.1.
Drive the vehicle and check that the Data List value (A/T Oil Temperature No.1) is between 20 and 100°C (68 and 212°F). [*1]
[*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: P071000.
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 |
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.
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.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Transmission / Trouble Codes.
Read the DTCs using the GTS.
If any DTCs other than P071000 are output, perform troubleshooting for those DTCs first.
| Result | Proceed to |
|---|---|
| Only DTC P071000 is output | A |
| DTC P071000 and other DTCs are output | B |
A
B
Check the CVT fluid level.
CVT fluid level is correct.
| Proceed to |
|---|
| OK |
| NG |
OK
NG