Lack of Power (Turbocharger System) [10/2022 - ]: Procedure

1. Check that no soot or oil adheres to the turbocharger sub-assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   If adhering soot or an oil leak exists, air leaking at that position may be the cause of the lack of boost pressure.

   Result

   Result	Proceed to
   No adhering soot or an oil	A
   Soot adhering around the turbine housing, flange, or V band (A in the illustration)	B
   Soot adhering around the bushing (B in the illustration)	C
   Oil leak from the contact surface between the compressor housing and the seal plate or between the seal plate and the bearing housing. (C in the illustration)	D
   Oil leak from the compressor housing flange (D in the illustration)	E

Result: 

B 

See step  5

Result: 

C 

See step  8

Result: 

D 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

E 

REPLACE GASKET 

Result: 

A 

See step  2

1. Check that the turbine shaft rotates smoothly, without catching.

   Refer to INSPECTION [10/2022 - ]

2. Check for loose turbine mounting nuts and for axial play in the turbine shaft.

   Refer to INSPECTION [10/2022 - ]

   HINT: 

   If the turbine shaft catches or if there no play or excessive play, it could indicate poor sliding due to seal damage due to seizing or a deposit build-up.

   Standard value

   0.10 mm (0.00394 in.) or less

   Result

   Result	Proceed to
   No turbine shaft malfunction	A
   Turbine shaft malfunction	B

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

A 

See step  3

1. Use a vacuum pump to apply -35 +/-4.0 kPa (-263 +/-35 mmHg) negative pressure to the diaphragm chamber and check that the waste gate valve seats.
   NOTE:

   Do not apply a negative pressure of -65 kPa (-488 mmHg) or more to the waste gate valve actuator with bracket assembly, as doing so may damage the diaphragm.

   Standard

   Waste gate valve seats without a gap

   Result

   Result	Proceed to
   Seats at less than -35 kPa (-263 mmHg) negative pressure	A
   Seats at -35 kPa (-263 mmHg) or greater negative pressure	B
   Waste gate valve does not move

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

A 

See step  4

1. Check for play in the waste gate valve and waste gate valve link.

   Standard

   Play exists

   HINT: 

   Some play is required as the waste gate valve link slides. If no play exists, the valve is determined to be stuck.

2. Check for gaps at the waste gate valve contact surface due to scratches, deformation or wear.

   Standard

   0.50 mm (0.0197 in.) or less

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

NG 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

1. Check for deformation or cracks in the mounting surfaces on the converter with catalyst assembly and the turbocharger sub-assembly.

   HINT: 

   Deformation or cracks on a mounting surface may allow exhaust gas to leak from the damaged position.

   Standard

   No deformation or cracks on a mounting surface

   Result

   Result	Proceed to
   No problem with the mounting surface	A
   Deformation or cracks on the converter with catalyst assembly mounting surface	B
   Deformation or cracks on the turbocharger sub-assembly mounting surface	C

Result: 

B 

REPLACE CONVERTER WITH CATALYST ASSEMBLY. Refer to  PROCEDURE - Step 6 [10/2022 - 11/2023]  , or refer to  PROCEDURE - Step 6 [11/2023 - ] 

Result: 

C 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

A 

See step  6

1. Replace the exhaust pipe clamp and the gasket.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check that the abnormal state has disappeared.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

1. Check that the bushing of the turbine housing waste gate valve link is free of cracks and the play does not exceed 0.5 mm.

   Standard

   No cracks and play does not exceed 0.5 mm (0.0196 in.)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

NG 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - ]