Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GYSN |
Model Year Start: 2020 |
Model: Corolla Hatchback |
Prod Date Range: [01/2019 - 11/2022] |
Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P0841,P2829; Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance; 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022] |
DTC
|
P0841
|
Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
|
DTC
|
P2829
|
Pressure Control Solenoid "K" Performance or Stuck Off
|
DESCRIPTION
The ECM controls the secondary oil pressure based on the secondary oil pressure signal output by the oil pressure sensor.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
Memory
|
P0841
|
Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
|
Either of the following conditions is met (1-trip detection logic):
-
When the requested oil pressure is less than 1.0 MPa (10.2 kgf/cm2, 145 psi), the oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more and the difference between the calculated primary pulley pressure and target primary pulley pressure is 2.0 MPa (20.4 kgf/cm2, 290 psi) or more for 3 seconds or more.
-
When the requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more, the oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi) for 2 seconds or more.
|
|
Comes on
|
DTC stored
|
P2829
|
Pressure Control Solenoid "K" Performance or Stuck Off
|
Any of the following conditions are met (1-trip detection logic):
-
When the requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more, the oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi) for 2 seconds or more.
-
When the vehicle speed is less than 8 km/h (5 mph), the actual gear ratio exceeds 4 or more for 0.2 seconds or more.
-
When the oil pressure sensor output is less than 0.35 MPa (3.6 kgf/cm2, 51 psi) and the target gear ratio is 2.0 or more, the actual gear ratio is less than 1.0 for 1.5 seconds or more.
-
When the requested oil pressure is 1.0 MPa (10.2 kgf/cm2, 145 psi) or less, the oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more and the difference between the calculated primary pulley pressure and target primary pulley pressure is 0.5 MPa (5.1 kgf/cm2, 73 psi) or more for 3 seconds or more.
|
-
Continuously variable transaxle assembly
-
ECM
|
Comes on
|
DTC stored
|
DTC Detection Condition Patterns (P0841):
|
Vehicle Condition
|
Pattern 1
|
Pattern 2
|
Diagnostic Condition
|
The requested oil pressure is less than 1.0 MPa (10.2 kgf/cm2, 145 psi).
|
○
|
-
|
The requested oil pressure value is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more.
|
-
|
○
|
Malfunction Condition
|
The oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more.
|
○
|
-
|
The difference between the calculated primary pulley pressure and target primary pulley pressure is 2.0 MPa (20.4 kgf/cm2, 290 psi).
|
○
|
-
|
The oil pressure sensor output value is 0.5 MPa (5.1 kgf/cm2, 73 psi) or less.
|
-
|
○
|
Duration
|
3 seconds or more
|
2 seconds or more
|
Detection Logic
|
1-trip detection logic
|
1-trip detection logic
|
DTC Detection Condition Patterns (P2829):
|
Vehicle Condition
|
Pattern 1
|
Pattern 2
|
Pattern 3
|
Pattern 4
|
Diagnostic Condition
|
The requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more.
|
○
|
-
|
-
|
-
|
The vehicle speed is less than 8 km/h (5 mph).
|
-
|
○
|
-
|
-
|
The oil pressure sensor output is less than 0.35 MPa (3.6 kgf/cm2, 51 psi).
|
-
|
-
|
○
|
-
|
The target gear ratio is 2.0 or more.
|
-
|
-
|
○
|
-
|
The requested oil pressure is 1.0 MPa (10.2 kgf/cm2, 145 psi) or less.
|
-
|
-
|
-
|
○
|
Malfunction Condition
|
The oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi).
|
○
|
-
|
-
|
-
|
The actual gear ratio is 4 or more.
|
-
|
○
|
-
|
-
|
The actual gear ratio is less than 1.0.
|
-
|
-
|
○
|
-
|
The oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more.
|
-
|
-
|
-
|
○
|
The difference between the calculated primary pulley pressure and target primary pulley pressure is 0.5 MPa (5.1 kgf/cm2, 73 psi) or more.
|
-
|
-
|
-
|
○
|
Duration
|
2 seconds or more
|
0.2 seconds or more
|
1.5 seconds or more
|
3 seconds or more
|
Detection Logic
|
1-trip detection logic
|
1-trip detection logic
|
1-trip detection logic
|
1-trip detection logic
|
HINT:
These DTCs are output when either of the above detection patterns is met.
MONITOR DESCRIPTION
The ECM checks for belt clamping high-pressure or low-pressure malfunctions. If a mechanical malfunction of the shift solenoid valve SLS or the oil pressure sensor is detected by the ECM, it illuminates the MIL and stores a DTC.
MONITOR STRATEGY
Related DTCs
|
P0841: Oil pressure sensor / Rationality fault diagnostics
P2829: Belt clamping pressure liner solenoid (Shift solenoid valve SLS) / Functional check
|
Required sensors/Components
|
-
Oil pressure sensor
-
Continuously variable transaxle assembly (Shift solenoid valve SLS)
|
Frequency of operation
|
Continuous
|
Duration
|
P2829
-
ON malfunction (A): 2 seconds
ON malfunction (B): 0.2 seconds
ON malfunction (C): 1.5 seconds
OFF malfunction: 3 seconds
|
MIL operation
|
1 driving cycle
|
Sequence of operation
|
None
|
TYPICAL ENABLING CONDITIONS
All
Electric throttle control system (ETCS)
|
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)
|
Knock sensor circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0327, P0328)
|
Engine coolant temperature (ECT) sensor circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0117, P0118)
|
Intake air temperature (IAT) sensor circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0112, P0113)
|
Pressure control solenoid "K" circuit
(Shift solenoid valve SLS circuit)
|
Not circuit malfunction
(MIL illuminated by following codes: P282F, P2830)
|
Transmission fluid pressure sensor "A" circuit
(CVT fluid pressure sensor circuit)
|
Not circuit malfunction
(MIL illuminated by following codes: P0842, P0843)
|
Shift position
|
"D" or "R" or "B"
|
Ignition switch
|
ON
|
Low voltage flag
|
OFF
|
P0841:
-
All
Transmission fluid temperature sensor "A" circuit
(CVT fluid temperature sensor circuit)
|
Not circuit malfunction
(MIL illuminated by following codes: P0712, P0713)
|
Crankshaft position sensor "A" circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0335, P0337, P0338)
|
Time after following condition is met:
|
0.5 seconds or more
|
- Variation of the accelerator pedal angle
|
Less than 0.5% per 32 msec.
|
Shift solenoid valve SLS
|
Operating clamping pressure control by ECM command
|
ON malfunction (A)
Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")
|
4 seconds or more
|
Engine speed
|
800 rpm or more
|
Transmission fluid temperature
|
-10°C (14°F) or more
|
ECT (Engine coolant temperature)
|
60°C (140°F) or more
|
Spark advance from MAX. retard timing by KCS control
|
0°CA or more
|
ON malfunction (B)
Shift solenoid "G" circuit
(Shift solenoid valve SC)
|
Not circuit malfunction
(MIL illuminated by following codes: P099B, P099C)
|
Torque converter clutch solenoid circuit
(Shift solenoid valve SL circuit)
|
Not circuit malfunction
(MIL illuminated by following codes: P2769, P2770)
|
Pressure control solenoid "J" circuit
(Shift solenoid valve SLP circuit)
|
Not circuit malfunction
(MIL illuminated by following codes: P2826, P2827)
|
Turbine speed sensor "A" circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0717, P07BF, P07C0)
|
Input speed sensor "B" circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P2767)
|
Output speed sensor circuit
|
Not circuit malfunction
(MIL illuminated by following codes: P0722, P077C, P077D)
|
Tire
|
Not slipping
|
Turbine speed - Input speed
|
Less than 50 rpm
|
ECT (Engine coolant temperature)
|
60°C (140°F) or more
|
Spark advance from MAX. retard timing by KCS control
|
0°CA or more
|
Engine speed
|
800 rpm or more
|
Input speed
|
100 rpm or more
|
Output speed
|
1000 rpm or more
|
Transmission fluid temperature
|
-10°C (14°F) or more and less than 140°C (284°F)
|
Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")
|
4 seconds or more
|
All of the following conditions are met: (a) and (b)
|
4.032 seconds or more
|
(a) ECM does NOT command
|
SC "ON"
|
(b) ECM does NOT command
|
SL "OFF"
|
Actual gear ratio
|
More than 0.3 and 2.2 or less
|
Accelerator pedal
|
ON
|
Target clamping pressure
|
Less than 1.0 MPa (10.2 kgf/cm2, 145 psi)
|
Shift solenoid valve SLP
|
Operating shift control by ECM command
|
OFF malfunction
Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")
|
4 seconds or more
|
Spark advance from MAX. retard timing by KCS control
|
0°CA or more
|
Engine speed
|
800 rpm or more
|
Transmission fluid temperature
|
-10°C (14°F) or more
|
ECT (Engine coolant temperature)
|
60°C (140°F) or more
|
TYPICAL MALFUNCTION THRESHOLDS
P0841:
-
ON malfunction
-
OFF malfunction
Target clamping pressure
|
1.4 MPa (14.3 kgf/cm2, 203 psi) or more
|
Actual clamping pressure
|
Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)
|
P2829:
-
ON malfunction
-
Any of the following conditions are met: ON malfunction (A), (B) or (C)
ON malfunction (A)
Target clamping pressure
|
1.4 MPa (14.3 kgf/cm2, 203 psi) or more
|
Actual clamping pressure
|
Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)
|
ON malfunction (B)
Actual gear ratio*2
|
4 or more
|
ON malfunction (C)
Target gear ratio
|
2 or more
|
Actual gear ratio
|
Less than 1
|
HINT:
*2: It is necessary 2 judgments / drive cycle
1st judgment: temporary flag "ON"
2nd judgment: pending fault code ON
-
OFF malfunction
COMPONENT OPERATING RANGE
Secondary oil pressure value
|
0.1 to 5.0 MPa (1 to 51 kgf/cm2, 15 to 725 psi)
|
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
-
Connect the Techstream to the DLC3.
-
Turn the ignition switch to ON and turn the Techstream 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 Techstream on.
-
Start the engine.
-
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 and ECT / Utility / All Readiness.
-
Input the DTC: P0841 or P2829.
-
Check the DTC judgment result.
Techstream 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.
CAUTION / NOTICE / HINT
CAUTION:
-
Do not perform a stall test if there are any people or objects near the vehicle.
-
The vehicle could begin moving suddenly, resulting in a serious accident.
-
Do not perform a stall test if any wheel chocks are out of position.
-
The vehicle could begin moving suddenly, resulting in a serious accident.
-
Do not perform the stall test on a slippery or low-friction surface that could allow the tires to spin.
-
The vehicle could begin moving suddenly, resulting in a serious accident.
NOTICE:
-
Perform the universal trip to clear permanent DTCs.
Click here
-
Perform 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 P0841 AND P2829)
|
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes
(e) Read the DTCs using the Techstream.
HINT:
If any DTCs other than P0841 or P2829 are output, perform troubleshooting for those DTCs first.
Result
|
Proceed to
|
Both DTC P0841 and P2829 are output
|
A
|
Only DTC P0841 is output
|
B
|
Only DTC P2829 is output
|
C
|
DTC P0841 and/or P2829 and other DTCs are output
|
D
|
A
|
|
|
2.
|
READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)
|
CAUTION:
A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
(a) Warm up the engine.
(b) Fully apply the parking brake and chock all 4 wheels.
HINT:
w/ Electric Parking Brake System:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.
Powertrain > Engine and ECT > Active Test
Active Test Display
|
Connect the TC and TE1
|
Data List Display
|
A/T Oil Pressure
|
(g) According to the display on the Techstream, perform the Active Test.
(h) According to the display on the Techstream, read the Data List.
Powertrain > Engine and ECT > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
A/T Oil Pressure
|
Secondary oil pressure value
|
Min.: -64 MPa
Max.: 63.998 MPa
|
Secondary oil pressure inspection:
-
3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
-
3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test
|
-
|
Result
|
Proceed to
|
Data List value is normal
|
A
|
Data List value is not normal
|
B
|
A
|
|
|
(a) Replace the ECM.
Click here
4.
|
REPLACE OIL PRESSURE SENSOR
|
(a) Replace the oil pressure sensor.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
NEXT
|
|
|
6.
|
PERFORM INITIALIZATION
|
(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.
Click here
NEXT
|
|
|
(a) Perform a road test.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes
(f) Read the DTCs using the Techstream.
Result
|
Proceed to
|
DTC P0841 and/or P2829 is output
|
A
|
DTCs are not output
|
B
|
B |
|
END
|
A
|
|
|
(a) Replace the ECM.
Click here
NEXT
|
|
|
9.
|
PERFORM INITIALIZATION
|
(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.
Click here
NEXT
|
|
|
(a) Perform a road test.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes
(f) Read the DTCs using the Techstream.
Result
|
Proceed to
|
DTC P2829 is output
|
A
|
DTCs are not output
|
B
|
B |
|
END
|
A
|
|
|
11.
|
REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY
|
(a) Replace the continuously variable transaxle assembly.
Click here
12.
|
READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)
|
CAUTION:
A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
(a) Warm up the engine.
(b) Fully apply the parking brake and chock all 4 wheels.
HINT:
w/ Electric Parking Brake System:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.
Powertrain > Engine and ECT > Active Test
Active Test Display
|
Connect the TC and TE1
|
Data List Display
|
A/T Oil Pressure
|
(g) According to the display on the Techstream, perform the Active Test.
(h) According to the display on the Techstream, read the Data List.
Powertrain > Engine and ECT > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
A/T Oil Pressure
|
Secondary oil pressure value
|
Min.: -64 MPa
Max.: 63.998 MPa
|
Secondary oil pressure inspection:
-
3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
-
3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test
|
-
|
Result
|
Proceed to
|
Data List value is normal
|
A
|
Data List value is not normal
|
B
|
A
|
|
|
(a) Replace the ECM.
Click here
14.
|
REPLACE OIL PRESSURE SENSOR
|
(a) Replace the oil pressure sensor.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
NEXT
|
|
|
16.
|
PERFORM INITIALIZATION
|
(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.
Click here
NEXT
|
|
|
(a) Perform a road test.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes
(f) Read the DTCs using the Techstream.
Result
|
Proceed to
|
DTC P0841 is output
|
A
|
DTCs are not output
|
B
|
B |
|
END
|
A
|
|
|
(a) Replace the ECM.
Click here
19.
|
READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)
|
CAUTION:
A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
(a) Warm up the engine.
(b) Fully apply the parking brake and chock all 4 wheels.
HINT:
w/ Electric Parking Brake System:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.
Powertrain > Engine and ECT > Active Test
Active Test Display
|
Connect the TC and TE1
|
Data List Display
|
A/T Oil Pressure
|
(g) According to the display on the Techstream, perform the Active Test.
(h) According to the display on the Techstream, read the Data List.
Powertrain > Engine and ECT > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
A/T Oil Pressure
|
Secondary oil pressure value
|
Min.: -64 MPa
Max.: 63.998 MPa
|
Secondary oil pressure inspection:
-
3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
-
3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test
|
-
|
Result
|
Proceed to
|
Data List value is normal
|
A
|
Data List value is not normal
|
B
|
A
|
|
|
(a) Replace the ECM.
Click here
21.
|
REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY
|
(a) Replace the continuously variable transaxle assembly.
Click here
|