DTC P25B3-72: Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open [10/2022 - ]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   P25B3-72 and other DTCs are output	A
   P25B3-72 is output	B

   HINT: 

   If any DTCs other than P25B3-72 are output, troubleshoot those DTCs first.

Result: 

A 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 08/2023]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

B 

See step  2

Pre-procedure1

• Start the engine.

• 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.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  16

Result: 

OK 

See step  3

1. Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

2. Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.

   Refer to INSPECTION [10/2022 - ]

3. 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.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature

   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

      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 5 gm/sec and 15 gm/sec

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  13

Result: 

OK 

See step  4

Refer to PROCEDURE - Step 1

Result

Result: 

NG 

See step  8

Result: 

OK 

See step  5

Pre-procedure1

• None.

• Clear the DTCs.

  Powertrain > Engine > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off and wait for at least 30 seconds.

Result: 

NEXT 

See step  6

Pre-procedure1

• Start the engine and warm it up.
• Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

• Check the DTC judgment result.

  Powertrain > Engine > Utility 

  Tester Display
  All Readiness

• Input the DTC: P25B3-72.

  Result

  Result	Proceed to
  NORMAL (DTCs are not output)	A
  ABNORMAL (DTC P25B3-72 is output)	B

Post-procedure1

• None.

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2022 - ] 

Result: 

B 

See step  7

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  26

Pre-procedure1

• Disconnect the No. 2 turbo pressure sensor connector.
• Turn the ignition switch to ON.

• Measure the voltage according to the value(s) in the table below.

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  B44-3 (VC) - B44-2 (E2)	Ignition switch ON	4.5 to 5.5 V	V
  B44-1 (PTA) - B44-2 (E2)	Ignition switch ON	3.0 to 5.0 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  10

Result: 

OK 

See step  9

HINT: 

Refer to PROCEDURE - Step 3

Result

Result: 

NEXT 

See step  26

Pre-procedure1

• Disconnect the No. 2 turbo pressure sensor connector.
• Disconnect the ECM connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B44-3 (VC) - B27-102 (VPTA)	Always	Below 1 Ω	Ω
  B44-1 (PTA) - B27-126 (PTA)	Always	Below 1 Ω	Ω
  B44-2 (E2) - B27-125 (EPTA)	Always	Below 1 Ω	Ω
  B44-3 (VC) or B27-102 (VPTA) - Body ground and other terminals	Always	10 kΩ or higher	kΩ
  B44-1 (PTA) or B27-126 (PTA) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  12

Result: 

OK 

See step  11

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  26

1. Repair or replace the wire harness or connector.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  26

Pre-procedure1

• Disconnect the mass air flow meter sub-assembly connector.
• Turn the ignition switch to ON.

• Measure the voltage according to the value(s) in the table below.

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  B14-3 (VCC) - B14-2 (E2G)	Ignition switch ON	4.8 to 5.2 V	V
  B14-1 (FG) - B14-2 (E2G)	Ignition switch ON	4.8 to 5.2 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  15

Result: 

OK 

See step  14

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

Result

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Pre-procedure1

• Disconnect the mass air flow meter sub-assembly connector.
• Disconnect the ECM connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B14-3 (VCC) - B27-73 (VCVG)	Always	Below 1 Ω	Ω
  B14-1 (FG) - B27-75 (VG)	Always	Below 1 Ω	Ω
  B14-2 (E2G) - B27-74 (E2G)	Always	Below 1 Ω	Ω
  B14-3 (VCC) or B27-73 (VCVG) - Body ground and other terminals	Always	10 kΩ or higher	kΩ
  B14-1 (FG) or B27-75 (VG) - Body ground and other terminals	Always	10 kΩ or higher	kΩ
  B14-2 (E2G) or B27-74 (E2G) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the vacuum hose (waste gate valve actuator with bracket assembly side) of the vacuum regulating valve assembly.
• When the waste gate valve is operated using the GTS and a vacuum gauge, check the vacuum of the vacuum regulating valve assembly.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Vacuum Regulating Valve Assembly
  *2	Vacuum Gauge

• Start the engine.

• Perform the Active Test using the GTS.

  Powertrain > Engine > Active Test 

  Tester Display
  Control the Wastegate Valve Duty Ratio

  OK

  GTS Operation	Specified Condition
  100%	Higher than 40 kPa (300 mmHg, 11.8 in. Hg)
  0%	Less than 10 kPa (75 mmHg, 3.0 in. Hg)

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  18

Result: 

OK 

See step  17

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  26

Pre-procedure1

• Disconnect the vacuum hose (vacuum pump assembly side) of the vacuum regulating valve assembly.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Vacuum Regulating Valve Assembly

• Start the engine.

• Check whether the vacuum hose of the vacuum regulating valve assembly applies suction your finger.

  OK

  Vacuum hose applies suction to finger.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  22

Result: 

OK 

See step  19

Refer to INSPECTION [10/2022 - ]

Result

Result: 

NG 

See step  21

Result: 

OK 

See step  20

1. Repair or replace the vacuum hose (waste gate valve actuator with bracket assembly - vacuum regulating valve assembly)

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  26

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  26

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

Result

Result: 

NG 

See step  24

Result: 

OK 

See step  23

1. Repair or replace the vacuum line (vacuum regulating valve assembly - vacuum pump assembly).

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  26

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  25

Pre-procedure1

• None.

• Clear the DTCs.

  Powertrain > Engine > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off and wait for at least 30 seconds.

Result: 

NEXT 

See step  26

Pre-procedure1

• Start the engine and warm it up.
• Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

• Check the DTC judgment result.

  Powertrain > Engine > Utility 

  Tester Display
  All Readiness

• Input the DTC: P25B3-72.

  GTS 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

  Result

  Proceed to
  NEXT

Post-procedure1

• None.

Result: 

NEXT 

END