- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002B35I |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [03/2023 - ] |
| Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P281F71; Pressure Control Solenoid "J" Performance/Stuck Off Actuator Stuck; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ] | ||
|
DTC |
P281F71 |
Pressure Control Solenoid "J" Performance/Stuck Off Actuator Stuck |
DESCRIPTION
Using the current from the ECM, the shift solenoid valve SLP controls the primary pulley pressure in accordance with the requested gear ratio to perform gear ratio changes.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Priority |
Note |
|---|---|---|---|---|---|---|---|
|
P281F71 |
Pressure Control Solenoid "J" Performance/Stuck Off Actuator Stuck |
Any of the following conditions are met (1-trip detection logic):
|
Continuously variable transaxle assembly (Shift solenoid valve SLP) |
Comes on |
Engine |
B |
SAE Code: P2820 |
MONITOR DESCRIPTION
The ECM compares the actual gear ratio with the target gear ratio. When the actual gear ratio and target gear ratio are different, the ECM detects the malfunction, illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
P2820: Pressure control solenoid "J" (Shift solenoid valve SLP)/Functional check |
|
Required sensors/Components |
Crankshaft position sensor Transmission revolution sensor (NT) Transmission revolution sensor (NC1) Transmission revolution sensor (NSS) Vehicle speed sensor CVT fluid temperature sensor Engine coolant temperature sensor Oil pressure sensor Shift solenoid valve SL1 Shift solenoid valve SL2 Shift solenoid valve SLP Shift solenoid valve SLS Shift solenoid valve SLU Shift solenoid valve SC1 Shift solenoid valve SC2 Shift solenoid valve SC3 |
|
Frequency of operation |
Continuous |
|
Duration |
OFF malfunction: 1.5 sec. ON malfunction: 2 sec. |
|
MIL operation |
1 driving cycle |
|
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) |
|
Crankshaft position sensor "A" circuit (Crankshaft position sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0335, P0337, P0338) |
|
Low voltage flag |
OFF |
|
Transmission fluid pressure sensor "A" circuit (Oil pressure sensor) |
Not circuit malfunction (MIL illuminated by following codes: P0842, P0843) |
|
Pressure control solenoid "J" circuit (Shift solenoid valve SLP) |
Not circuit malfunction (MIL illuminated by following codes: P2826, P2827) |
|
Pressure control solenoid "K" circuit (Shift solenoid valve SLS) |
Not circuit malfunction (MIL illuminated by following codes: P282F, P2830) |
|
Torque converter clutch pressure control solenoid circuit (Shift solenoid valve SLU) |
Not circuit malfunction (MIL illuminated by following codes: P2763, P2764) |
|
Pressure control solenoid "A" circuit (Shift solenoid valve SL1) |
Not circuit malfunction (MIL illuminated by following codes: P0962, P0963) |
|
Pressure control solenoid "B" circuit (Shift solenoid valve SL2) |
Not circuit malfunction (MIL illuminated by following codes: P0966, P0967) |
|
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) |
|
Intermediate shaft speed sensor "C" circuit (Transmission revolution sensor (NSS)) |
Not circuit malfunction (MIL illuminated by following codes: P07C9, P07CA, P2751) |
|
Output speed sensor circuit (Transmission revolution sensor (NOUT)) |
Not circuit malfunction (MIL illuminated by following codes: P0722, P077C, P077D) |
|
Intermediate shaft speed sensor "B" circuit (Transmission revolution sensor (NC1)) |
Not circuit malfunction (MIL illuminated by following codes: P07C7, P07C8, P2747) |
|
Shift solenoid "H" circuit (Shift solenoid valve SC1) |
Not circuit malfunction (MIL illuminated by following codes: P099E, P099F) |
|
Shift solenoid "J" circuit (Shift solenoid valve SC2) |
Not circuit malfunction (MIL illuminated by following codes: P08D2, P08D3) |
|
Shift solenoid "K" circuit (Shift solenoid valve SC3) |
Not circuit malfunction (MIL illuminated by following codes: P08DB, P08DC) |
OFF malfunction
|
Tire |
Not slipping |
|
ECT |
60°C (140°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
|
Shift solenoid valve SLP |
Operating shift control by ECM command |
|
Engine speed |
500 rpm or more |
|
Primary sheave speed |
100 rpm or more |
|
Secondary sheave speed |
150 rpm or more |
|
Output speed |
150 rpm or more |
|
Transmission fluid temperature |
-10°C (14°F) or more and less than 140°C (284°F) |
|
Target clamping pressure - Actual clamping pressure |
Less than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
|
Actual clamping pressure |
0.4 MPa (4.1 kgf/cm2, 58 psi) or more |
|
Any of the following conditions are met: (a) or (b) |
- |
|
(a) Gear mode clutch |
Engaged |
|
(b) Belt mode clutch |
Engaged |
ON malfunction (1st judgment)
|
Tire |
Not slipping |
|
ECT |
60°C (140°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
|
Shift solenoid valve SLP |
Operating shift control by ECM command |
|
Engine speed |
500 rpm or more |
|
Primary sheave speed |
100 rpm or more |
|
Secondary sheave speed |
150 rpm or more |
|
Output speed |
150 rpm or more |
|
Transmission fluid temperature |
-10°C (14°F) or more and less than 140°C (284°F) |
|
Target clamping pressure - Actual clamping pressure |
Less than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
|
Any of the following conditions are met: (a) or (b) |
- |
|
(a) Gear mode clutch |
Engaged |
|
(b) Belt mode clutch |
Engaged |
ON malfunction (2nd judgment)
|
Tire |
Not slipping |
|
ECT |
60°C (140°F) or more |
|
Spark advance from MAX. retard timing by KCS control |
0 °CA or more |
|
Shift solenoid valve SLP |
Operating shift control by ECM command |
|
Engine speed |
500 rpm or more |
|
Primary sheave speed |
100 rpm or more |
|
Secondary sheave speed |
150 rpm or more |
|
Output speed |
150 rpm or more |
|
Transmission fluid temperature |
-10°C (14°F) or more and less than 140°C (284°F) |
|
Target clamping pressure - Actual clamping pressure |
Less than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
|
Any of the following conditions are met: (a) or (b) |
- |
|
(a) Gear mode clutch |
Engaged |
|
(b) Belt mode clutch |
Engaged |
|
Actual clamping pressure |
0.4 MPa (4.1 kgf/cm2, 58 psi) or more |
|
Following condition is met once after 1st judgment |
- |
|
- Vehicle speed |
Less than 10 km/h (6 mph) |
TYPICAL MALFUNCTION THRESHOLDS
OFF malfunction
|
Target gear ratio |
2 or more |
|
Actual gear ratio |
Less than 0.55 |
ON malfunction
|
It is necessary 2 judgments per drive cycle.
2nd judgment: pending fault code ON |
|
|
Target gear ratio |
Less than 1.1 |
|
Actual gear ratio |
1.8 or more |
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: P281F71.
-
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.
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
HINT:
If any DTCs other than P281F71 are output, perform troubleshooting for those DTCs first.
PROCEDURE
|
1. |
CHECK DTC OUTPUT (DTC P281F71) |
(a) Read the DTCs using the GTS.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Only P281F71 is output |
A |
|
P281F71 and P076A7E are output |
B |
|
P281F71 and other DTCs are output |
C |
| B |
|
| C |
|
GO TO DTC CHART |
|
|
2. |
REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY |
HINT:
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
|