- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000255X6 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - 08/2023] |
| Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P25B372; Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open; 2023 MY GR Corolla [09/2022 - 08/2023] | ||
|
DTC |
P25B372 |
Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open |
DESCRIPTION
Refer to DTC P024313.
Click here
![2023 - 2025 MY GR Corolla [09/2022 - ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P024313; Turbocharger/Supercharger Wastegate Solenoid "A" Circuit Open+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
P25B372 |
Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open |
The boost pressure does not increase despite control to close the waste gate valve (2 trip detection logic). |
|
Comes on |
SAE Code: P25B3 |
MONITOR DESCRIPTION
If the boost pressure does not increase despite control to close the waste gate valve, it is determined that there is a waste gate valve stuck open malfunction. The ECM illuminates the MIL and stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P25B3: waste gate valve stuck open |
|
Required Sensors/Components (Main) |
No. 2 turbo pressure sensor Mass air flow meter sub-assembly |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Once per driving cycle |
|
Duration |
Within 10 seconds |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Engine coolant temperature |
-10°C (14°F) or higher |
|
Intake air temperature (for mass air flow meter sub-assembly) |
-10°C (14°F) or higher |
|
Battery voltage |
11 V or higher |
|
Atmospheric pressure |
76 kPa(abs) [11 psi(abs)] or higher |
|
Ignition switch |
ON |
|
Time after engine start |
1 second or more |
|
Intake air amount |
25 g/sec or more |
|
Vacuum regulating valve pressure |
43 kPa [6.24 psi] or higher |
TYPICAL MALFUNCTION THRESHOLDS
|
Both of following conditions met when following judgment timing* |
Conditions 1 and 2 |
|
1. Max boost pressure |
Less than 120 kPa [17.4 psi] |
|
2. Accumulation intake air amount |
50 g or more |
|
*: Judgment timing |
- |
|
Both of following conditions met |
Conditions 1 and 2 |
|
1: Intake air amount - intake air amount before 65 ms |
Less than 0 g/sec |
|
2: Intake air amount before 65 ms - intake air amount before 128 ms |
0 g/sec or more |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- 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 at least 30 seconds.
- Turn the ignition switch to ON and turn the GTS on.
- Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
-
Drive the vehicle at 70 km/h (43 mph) or more [B].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
-
Accelerate to 80 km/h (50 mph) or more with the accelerator pedal fully depressed [C].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Enter the following menus: Powertrain / Engine / Trouble Codes [D].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P25B372.
-
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
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, perform steps [C] and [D] again.
-
[A] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
-
Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.
Click here
-
Refer to DTC P023511 for No. 2 turbo pressure sensor circuit.
Click here
CAUTION / NOTICE / HINT
HINT:
Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
|
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P25B372) |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P25B372 is output |
A |
|
DTC P25B372 and other DTCs are output |
B |
HINT:
If any DTCs other than P25B372 are output, troubleshoot those DTCs first.
| B |
|
GO TO DTC CHART |
|
|
2. |
PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO) |
(a) Start the engine.
(b) Perform the Active Test. Check that the waste gate valve is operating.
Powertrain > Engine > Active Test
|
Tester Display |
|---|
|
Control the Wastegate Valve Duty Ratio |
OK:
The waste gate valve is operating.
| NG |
|
|
|
3. |
INSPECT MASS AIR FLOW METER SUB-ASSEMBLY |
(a) Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.
Click here
(b) Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.
Click here
(c) Inspect the operation of the mass air flow meter sub-assembly.
(1) Start the engine.
(2) Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
(3) Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Engine Speed |
|
Mass Air Flow Sensor |
|
Coolant Temperature |
Standard:
|
GTS Display |
Condition |
Specified Condition |
|---|---|---|
|
Mass Air Flow Sensor |
Engine warmed up Shift lever position: P A/C: Off Engine Speed: 3000 rpm |
Between 4.5 gm/sec and 12 gm/sec |
| NG |
|
|
|
4. |
INSPECT NO. 2 TURBO PRESSURE SENSOR |
Click here
| NG |
|
|
|
5. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372) |
(a) Connect the GTS to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the GTS on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Start the engine and warm it up.
(g) Turn the GTS on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Check the DTC judgment result.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
All Readiness |
(j) Input the DTC: P25B372.
|
Result |
Proceed to |
|---|---|
|
NORMAL (DTCs are not output) |
A |
|
ABNORMAL (DTC P25B372 is output) |
B |
| A |
|
|
|
6. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
7. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 2 TURBO PRESSURE SENSOR) |
(a) Disconnect the No. 2 turbo pressure sensor connector.
(b) Turn the ignition switch to ON.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
|
|
8. |
REPLACE NO. 2 TURBO PRESSURE SENSOR |
Click here
| NEXT |
|
|
9. |
CHECK HARNESS AND CONNECTOR (NO. 2 TURBO PRESSURE SENSOR - ECM) |
(a) Disconnect the No. 2 turbo pressure sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C135-3 (VC) - C142-80 (VPTA) |
Always |
Below 1 Ω |
|
C135-1 (PTA) - C142-103 (PTA) |
Always |
Below 1 Ω |
|
C135-2 (E2) - C142-79 (EPTA) |
Always |
Below 1 Ω |
|
C135-3 (VC) or C142-80 (VPTA) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C135-1 (PTA) or C142-103 (PTA) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
|
|
10. |
REPLACE ECM |
Click here
| NEXT |
|
|
11. |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
(a) Repair or replace the wire harness or connector.
| NEXT |
|
|
12. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY) |
(a) Disconnect the mass air flow meter sub-assembly connector.
(b) Turn the ignition switch to ON.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
|
|
13. |
INSPECT MASS AIR FLOW METER SUB-ASSEMBLY |
Click here
| OK |
|
REPLACE ECM
|
| NG |
|
|
14. |
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) |
(a) Disconnect the mass air flow meter sub-assembly connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C26-3 (VCC) - C142-84 (VCVG) |
Always |
Below 1 Ω |
|
C26-1 (FG) - C142-107 (VG) |
Always |
Below 1 Ω |
|
C26-2 (E2G) - C142-83 (E2G) |
Always |
Below 1 Ω |
|
C26-3 (VCC) or C142-84 (VCVG) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C26-1 (FG) or C142-107 (VG) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C26-2 (E2G) or C142-83 (E2G) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
15. |
PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO) |
|
*1 |
Waste Gate Valve Actuator with Bracket Assembly |
(a) Disconnect the vacuum hose of the waste gate valve actuator with bracket assembly.
(b) Start the engine.
(c) Perform the Active Test using the GTS.
Powertrain > Engine > Active Test
|
Tester Display |
|---|
|
Control the Wastegate Valve Duty Ratio |
(d) When the waste gate valve is operated using the GTS, check whether the vacuum hose of the waste gate valve actuator with bracket assembly applies suction your finger.
OK:
|
GTS Operation |
Specified Condition |
|---|---|
|
100% |
Vacuum hose applies suction to finger |
|
0% |
Vacuum hose applies no suction to finger |
| NG |
|
|
|
16. |
REPLACE TURBOCHARGER SUB-ASSEMBLY |
Click here
| NEXT |
|
|
17. |
CHECK VACUUM PUMP ASSEMBLY |
|
*1 |
Vacuum Regulating Valve Assembly |
(a) Disconnect the vacuum hose (vacuum pump assembly side) of the vacuum regulating valve assembly.
(b) Start the engine.
(c) Check whether the vacuum hose of the vacuum regulating valve assembly applies suction your finger.
OK:
Vacuum hose applies suction to finger.
| NG |
|
|
|
18. |
INSPECT VACUUM REGULATING VALVE ASSEMBLY |
Click here
| NG |
|
|
|
19. |
REPAIR OR REPLACE VACUUM HOSE (WASTE GATE VALVE ACTUATOR WITH BRACKET ASSEMBLY - VACUUM REGULATING VALVE ASSEMBLY) |
(a) repair or replace the vacuum hose (waste gate valve actuator with bracket assembly - vacuum regulating valve assembly)
| NEXT |
|
|
20. |
REPLACE VACUUM REGULATING VALVE ASSEMBLY |
Click here
| NEXT |
|
|
21. |
INSPECT VACUUM PUMP ASSEMBLY |
Click here
| NG |
|
|
|
22. |
REPAIR OR REPLACE VACUUM LINE (VACUUM REGULATING VALVE ASSEMBLY - VACUUM PUMP ASSEMBLY) |
(a) repair or replace the vacuum line (vacuum regulating valve assembly - vacuum pump assembly).
| NEXT |
|
|
23. |
REPLACE VACUUM PUMP ASSEMBLY |
Click here
|
|
24. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372) |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(b) Turn the ignition switch off and wait for at least 30 seconds.
(c) Start the engine and warm it up.
(d) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(e) Check the DTC judgment result.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
All Readiness |
(f) Input the DTC: P25B372.
|
GTS Display |
Description |
|---|---|
|
NORMAL |
|
|
ABNORMAL |
|
|
INCOMPLETE |
|
| NEXT |
|
END |
|
|