- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000002B35C |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [03/2023 - ] |
| Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P071512,P071514,P071531; Input/Turbine Speed Sensor "A" Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ] | ||
|
DTC |
P071512 |
Input/Turbine Speed Sensor "A" Circuit Short to Battery |
|
DTC |
P071514 |
Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open |
|
DTC |
P071531 |
Input/Turbine Speed Sensor "A" No Signal |
DESCRIPTION
The ECM uses signals from the transmission revolution sensor (NT) installed to the continuously variable transaxle to control the lock-up engagement pressure.
The transmission revolution sensor (NT) detects the input turbine speed and sends it to the ECM.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Priority |
Note |
|---|---|---|---|---|---|---|---|
|
P071512 |
Input/Turbine Speed Sensor "A" Circuit Short to Battery |
The transmission revolution sensor (NT) signal is normal but the transmission revolution sensor (NT) output voltage is higher than 1.8 V for 2 seconds or more (1-trip detection logic). |
|
Comes on |
Engine |
A |
SAE Code: P07C0 |
|
P071514 |
Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open |
The transmission revolution sensor (NT) signal is normal but the transmission revolution sensor (NT) output voltage is less than 0.2 V for 2 seconds or more (1-trip detection logic). |
|
Comes on |
Engine |
A |
SAE Code: P07BF |
|
P071531 |
Input/Turbine Speed Sensor "A" No Signal |
When transmission revolution sensor (NSS) signal indicates 780 rpm or more and the vehicle speed (SPD) signal indicates 27 km/h (17 mph) or more, the transmission revolution sensor (NT) signal indicates less than 300 rpm for 5 seconds or more (1-trip detection logic). |
|
Comes on |
Engine |
A |
SAE Code: P0717 |
MONITOR DESCRIPTION
The transmission revolution sensor (NT) is used to detect the input turbine speed. The ECM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input turbine speed) and vehicle speed (SPD) signals.
When the vehicle speed is higher than the expected value and the input turbine speed is less than 300 rpm while driving with the shift lever in D, the ECM will determine that the transmission revolution sensor (NT) is malfunctioning, illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0717: Turbine speed sensor (Transmission revolution sensor (NT))/Verify pulse input P07BF: Turbine speed sensor (Transmission revolution sensor (NT))/Range check (Low voltage) P07C0: Turbine speed sensor (Transmission revolution sensor (NT))/Range check (High voltage) |
|
Required sensors/Components |
Transmission revolution sensor (NT) Transmission revolution sensor (NSS) Vehicle speed sensor |
|
Frequency of operation |
Continuous |
|
Duration |
P0717: 5 sec. P07BF, P07C0: 2 sec. |
|
MIL operation |
Immediate |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Battery voltage |
8 V or more |
|
Ignition switch |
ON |
|
Starter |
OFF |
P0717
|
Turbine speed sensor range check fail (P07BF, P07C0) (Pending / MIL) |
Not detected |
|
D range position switch |
ON |
|
R range position switch |
OFF |
|
Park position switch |
OFF |
|
Neutral position switch |
OFF |
|
Engine |
Running |
|
Pressure control solenoid circuit fail (P0962, P0963, P0966, P0967, P2826, P2827, P282F, P2830) (Pending + MIL) |
Not detected |
|
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL) |
Not detected |
|
Shift solenoid circuit fail (P08D2, P08D3, P08DB, P08DC, P099E, P099F) (Pending + MIL) |
Not detected |
|
Intermediate shaft speed sensor for belt drive revolution |
780 rpm or more |
|
Vehicle speed |
27 km/h (16.78 mph) or more |
P07BF, P07C0
|
Turbine speed sensor pulse input fail (P0717) (Pending / MIL) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0717
|
Turbine speed sensor revolution |
Less than 300 rpm |
P07BF
|
Turbine speed sensor voltage |
Less than 0.2 V |
P07C0
|
Turbine speed sensor voltage |
More than 1.8 V |
COMPONENT OPERATING RANGE
P0717
|
Turbine speed sensor revolution |
300 rpm or more |
P07BF, P07C0
|
Turbine speed sensor voltage |
0.2 V or more and 1.8 V or less |
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
![2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- 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.
-
Perform the D Position Shift Test inspection in Road Test. [*1]
Click here
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Stop the vehicle.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P071512, P071514 or P071531.
-
Check the DTC judgment result.
GTS 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.
WIRING DIAGRAM
for TMMMS Made
for TMC Made
CAUTION / NOTICE / HINT
CAUTION:
-
Strictly observe posted speed limits, traffic laws and road conditions.
- Do not drive the vehicle with the cable of the GTS contacting the pedals, shift lever or steering wheel.
- Driving the vehicle with the cable of the GTS contacting these areas could impede vehicle control, resulting in a serious accident.
-
Do not operate the GTS while driving the vehicle.
- Operating the GTS while driving the vehicle will prevent you from paying sufficient attention to vehicle surroundings, and could result in a serious accident.
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. |
READ VALUE USING GTS (NT SENSOR VOLTAGE) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NT Sensor Voltage |
Transmission revolution sensor (NT) output voltage |
Min.: 0.000 V Max.: 4.999 V |
0.2 to 1.8 V: Engine idling (Vehicle stopped with shift lever in P or N) |
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
NT Sensor Voltage |
|
Result |
Proceed to |
|---|---|
|
The value of NT Sensor Voltage is between 0.2 and 1.8 V |
A |
|
None of the above conditions are met |
B |
| B |
|
|
|
2. |
READ VALUE USING GTS (NT SENSOR SPEED) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NT Sensor Speed |
Input turbine speed (NT) |
Min.: 0 rpm Max.: 65535 rpm |
0 rpm: Vehicle stopped with shift lever in R |
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
NT Sensor Speed |
|
Result |
Proceed to |
|---|---|
|
The value of NT Sensor Speed is 0 rpm |
A |
|
None of the above conditions are met |
B |
| B |
|
|
|
3. |
READ VALUE USING GTS (NT SENSOR SPEED) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NT Sensor Speed |
Input turbine speed (NT) |
Min.: 0 rpm Max.: 65535 rpm |
|
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
NT Sensor Speed |
|
Result |
Proceed to |
|---|---|
|
Data List values are normal |
A |
|
Data List values are not normal |
B |
| B |
|
|
|
4. |
READ VALUE USING GTS (NT SENSOR SPEED) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NT Sensor Speed |
Input turbine speed (NT) |
Min.: 0 rpm Max.: 65535 rpm |
Equal to NC1 Sensor Speed: Vehicle being driven in gear mode |
- |
|
NC1 Sensor Speed |
Intermediate shaft (C1 clutch) speed (NC1) |
Min.: 0 rpm Max.: 65535 rpm |
Equal to NT Sensor Speed: Vehicle being driven in gear mode |
- |
|
Shift Mode |
Shift mode status |
Gear Mode or Belt Mode |
- |
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
NT Sensor Speed |
|
NC1 Sensor Speed |
|
Shift Mode |
|
Result |
Proceed to |
|---|---|
|
The value of NT Sensor Speed and NC1 Sensor Speed are the same |
A |
|
The value of NT Sensor Speed and NC1 Sensor Speed are different |
B |
| B |
|
|
|
5. |
REPLACE ECM |
HINT:
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
6. |
INSPECT TRANSMISSION REVOLUTION SENSOR (NT) |
Click here
| NG |
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM) |
Pre-procedure1
(a) for TMMMS Made:
(1) Disconnect the C67 transmission revolution sensor (NT) connector.
(b) for TMC Made:
(1) Disconnect the C112 transmission revolution sensor (NT) connector.
(c) Disconnect the C160 ECM connector.
Procedure1
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance (for TMMMS Made):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C67-2 (NTB) - C160-152 (NTB) |
Always |
Below 1 Ω |
|
C67-1 (NTO) - C160-153 (NTO) |
Always |
Below 1 Ω |
|
C67-2 (NTB) or C160-152 (NTB) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C67-1 (NTO) or C160-153 (NTO) - Body ground and other terminals |
Always |
10 kΩ or higher |
Standard Resistance (for TMC Made):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C112-2 (NTB) - C160-152 (NTB) |
Always |
Below 1 Ω |
|
C112-1 (NTO) - C160-153 (NTO) |
Always |
Below 1 Ω |
|
C112-2 (NTB) or C160-152 (NTB) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C112-1 (NTO) or C160-153 (NTO) - Body ground and other terminals |
Always |
10 kΩ or higher |
Post-procedure1
(e) Connect the C160 ECM connector.
(f) for TMMMS Made:
(1) Connect the C67 transmission revolution sensor (NT) connector.
(g) for TMC Made:
(1) Connect the C112 transmission revolution sensor (NT) connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM) |
|
|
8. |
REPLACE ECM |
HINT:
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
|