- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001G8NQ |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [01/2019 - ] |
| Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P071000; Transmission Fluid Temperature Sensor "A" Circuit Range/Performance; 2020 - 2025 MY Corolla Corolla Hatchback [01/2019 - ] | ||
|
DTC |
P071000 |
Transmission Fluid Temperature Sensor "A" Circuit Range/Performance |
DESCRIPTION
The CVT fluid temperature sensor converts the fluid temperature into a resistance value which is detected by the TCM.
The sensor resistance changes with the CVT fluid temperature. As the temperature rises, the sensor resistance decreases. The TCM applies voltage to the temperature sensor through TCM 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 |
|---|---|---|---|---|---|---|
|
P071000 |
Transmission Fluid Temperature Sensor "A" Circuit Range/Performance |
Either of the following conditions is met (2-trip detection logic):
|
|
Comes on |
DTC stored |
SAE Code: P0711 |
DTC Detection Condition Patterns:
|
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 is less than 20°C (68°F). |
○ |
- |
|
The CVT fluid temperature is 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 |
|
HINT:
This DTC is output when either of the above detection patterns is met.
MONITOR DESCRIPTION
The CVT fluid temperature sensor converts the CVT fluid temperature to an electrical resistance value. Based on the resistance, the TCM determines the CVT fluid temperature and detects an open or short circuit 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 TCM 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 TCM interprets this as a malfunction, illuminates the MIL, and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
P0711: CVT fluid temperature sensor/Rationality fault diagnostics |
|
Required sensors/Components |
CVT fluid temperature sensor (TFT sensor) |
|
Frequency of operation |
Continuous |
|
Duration |
3 sec. |
|
MIL operation |
2 driving cycles |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
ALL
|
ETC system (Electronic throttle control system) |
Not system down (MIL illuminated by following codes: P0121, P0122, P0123, P0222, P0223, P0604, P0606, P0607, P060D, P060E, P0657, P0658, P1607, P16B0, P2102, P2103, P2111, P2112, P2119, P2135) |
|
KCS sensor circuit (Knock sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0327, P0328) |
|
ECT sensor circuit (Engine coolant temperature sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0117, P0118) |
|
IAT sensor circuit (Intake air temperature sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0112, P0113) |
|
Transmission fluid temperature sensor "A" circuit (CVT fluid temperature sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0712, P0713) |
|
Turbine speed sensor "A" circuit (Transmission revolution sensor (NT)) |
Not circuit malfunction (MIL illuminated by following codes: P0717, P07BF, P07C0) |
|
Output speed sensor circuit (Transmission revolution sensor (NOUT)) |
Not circuit malfunction (MIL illuminated by following codes: P0722, P077C, P077D) |
|
Soak timer circuit |
Not circuit malfunction (MIL illuminated by following code: P2610) |
|
Low voltage flag |
OFF |
Condition (A)
|
Time after engine start except for continuing shift position "N" or "P"*2 |
10 min. or more |
|
Accumulated driving time*1 |
2 min. and 55 sec. or more |
|
Driving distance after engine start*3 |
5 km (3.1 miles) or more |
|
IAT*4 |
15°C (59°F) or higher |
|
ECT (12 sec. after engine start) |
15°C (59°F) or higher |
|
Soak time |
5 hours or more |
Condition (B)
|
Time after engine start except for continuing shift position "N" or "P"*2 |
18 min. and 20 sec. or more |
|
Accumulated driving time*1 |
4 min. and 10 sec. or more |
|
Driving distance after engine start*3 |
7 km (4.3 miles) or more |
|
IAT*4 |
-10°C (14°F) or more |
|
ECT (12 sec. after engine start) |
-10°C (14°F) or more |
Condition (C)
|
Time after engine start except for continuing shift position "N" or "P"*2 |
30 min. or more |
|
Accumulated driving time*1 |
6 min. and 40 sec. or more |
|
Driving distance after engine start*3 |
16 km (9.9 miles) |
|
IAT*4 |
-15°C (5°F) or more |
|
ECT (12 sec. after engine start) |
-15°C (5°F) or more |
Condition (D)
|
Time after engine start except for continuing shift position "N" or "P"*2 |
55 min. or more |
|
Accumulated driving time*1 |
12 min. and 30 sec. or more |
|
Driving distance after engine start*3 |
27 km (16.8 miles) |
Condition (E)
|
Any of the following conditions is met: |
- |
|
- Elapsed time for ECT to reach 60°C (140°F) |
10 sec. or more |
|
- Soak time |
5 hours or more |
|
ECT (12 sec. after engine start) |
Below 35°C (95°F) |
HINT:
*1: Following conditions are met
|
Engine speed - Turbine speed |
-50 rpm or more |
|
Output speed |
400 rpm or more |
|
Throttle valve opening angle |
3% or more |
|
Shift position |
Not "N" or "P" |
|
Engine |
Starting |
|
Accumulated driving time is cleared when following condition met |
- |
|
Duration time from shift position "N" or "P" |
300 sec. or more |
*2: Time after engine start is cleared when following condition met
|
Duration time from shift position "N" or "P" |
300 sec. or more |
*3: Driving distance is cleared when following condition met
|
Duration time from shift position "N" or "P" |
300 sec. or more |
*4: IAT is measured when either of following conditions met
|
12 sec. after engine start |
- |
|
Duration time from shift position "N" or "P" |
300 sec. or more |
TYPICAL MALFUNCTION THRESHOLDS
One of the following conditions is met: Condition (A), (B), (C), (D) or (E)
Condition (A), (B), (C) and (D)
|
Duration time from engine start |
12 sec. or more |
|
ECT |
-15°C (5°F) or higher |
|
CVT fluid temperature |
Below 20°C (68°F) |
Condition (E)
|
CVT fluid temperature |
100 °C (212°F) or higher |
COMPONENT OPERATING RANGE
|
CVT fluid temperature |
20°C (68°F) or higher and below 100°C (212 °F) |
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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.
Click here
![2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for 2 minutes or more.
- Start the engine and turn the Techstream on.
- Enter the following menus: Powertrain / Transmission / Data List / A/T Oil Temperature No.1.
-
Warm up the engine and check that the Data List value (A/T Oil Temperature No.1) is between 20 and 100°C (68 and 212°F). [*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: P071000.
-
Check the DTC judgment result.
Techstream Display
Description
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.
CAUTION / NOTICE / HINT
NOTICE:
-
Perform the universal trip to clear permanent DTCs.
Click here
-
Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.
Click here
-
Check that no DTCs are stored after performing initialization.
Click here
PROCEDURE
|
1. |
CHECK DTC OUTPUT (IN ADDITION TO DTC P071000) |
(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 / Transmission / Trouble Codes.
Powertrain > Transmission > Trouble Codes
(e) Read the DTCs using the Techstream.
HINT:
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 |
| B |
|
GO TO DTC CHART
|
|
|
2. |
CHECK CVT FLUID LEVEL |
(a) Check the CVT fluid level.
Click here
OK:
CVT fluid level is correct.
| OK |
|
REPLACE TRANSMISSION WIRE (CVT FLUID TEMPERATURE SENSOR)
|
| NG |
|
ADD FLUID
|
|
|