Lack of Power (Turbocharger System) [10/2015 - ]: 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  9

Result: 

C 

See step  12

Result: 

D 

REPLACE COMPRESSOR HOUSING WITH BEARING SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

E 

REPLACE GASKET 

Result: 

A 

See step  2

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

   Refer to ON-VEHICLE INSPECTION [10/2015 - ]

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

   Refer to INSPECTION [10/2015 - ]

   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 

See step  8

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	C

Result: 

B 

See step  6

Result: 

C 

See step  7

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: 

NG 

REPLACE TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

OK 

See step  5

1. Inspect the air by-pass valve assembly, referring to On-vehicle Inspection for Air by-pass Valve Assembly.

   Refer to ON-VEHICLE INSPECTION [10/2015 - ]

2. Inspect the air by-pass valve assembly, referring to Inspection for Air by-pass Valve Assembly.

   Refer to INSPECTION [10/2015 - ]

3. Check for accumulated deposits, deformation and wear on the air by-pass valve assembly contact surfaces (air by-pass valve side and compressor housing side).

   HINT: 

   A problem with the air by-pass valve assembly contact surfaces may allow air to leak from the damaged position.

   Standard

   0.50 mm (0.0197 in.) or less wear on the contact surface

   Result

   Result		Proceed to
   No malfunction discovered during air by-pass valve assembly on-vehicle and individual check	No problem with the air by-pass valve assembly contact surface	A
   	Deformation, wear or accumulated deposits on the compressor housing with bearing sub-assembly contact surface	B
   	Deformation, wear or accumulated deposits on the air by-pass valve assembly contact surface	C
   Malfunction discovered during air by-pass valve assembly on-vehicle and individual check	-

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 11/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [11/2017 - ] 

Result: 

B 

REPLACE COMPRESSOR HOUSING WITH BEARING SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

C 

REPLACE AIR BY-PASS VALVE ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

1. Check the waste gate valve actuator pin for wear.

   Refer to INSPECTION [10/2015 - ]

   Standard

   0.50 mm (0.0197 in.) or less

   HINT: 

   If the wear on the waste gate valve actuator pin does not exceed the standard (no problem with waste gate valve actuator with bracket assembly), the cause may be wear of the waste gate valve link or cracks in the bushing. Replace the turbine housing with valve sub-assembly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

NG 

REPLACE WASTE GATE VALVE ACTUATOR WITH BRACKET ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

1. Move the waste gate valve actuator link and rod by hand to check that they move smoothly (do not stick).

   Refer to INSPECTION [10/2015 - ]

   HINT: 

   If the waste gate valve actuator link and rod move smoothly by hand but the valve does not operate when a negative pressure is applied, there may be damage to the diaphragm, etc. inside the waste gate valve actuator.

   Result

   Result	Proceed to
   Waste gate valve actuator link and rod move smoothly by hand (valve does not operate when a negative pressure is applied)	A
   Waste gate valve actuator rod does not move smoothly
   Waste gate valve actuator link does not move smoothly	B

Result: 

A 

REPLACE WASTE GATE VALVE ACTUATOR WITH BRACKET ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

B 

REPLACE TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

1. Check for interference between the turbine wheel and the turbine housing.

   Refer to INSPECTION [10/2015 - ]

   HINT: 

   If interference exists between the turbine wheel and turbine housing, replace the compressor housing with bearing sub-assembly and turbine housing with valve sub-assembly as a set.

   Result

   Result	Proceed to
   No damage or interference	A
   Damage or interference exists	B

Result: 

A 

REPLACE COMPRESSOR HOUSING WITH BEARING SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

B 

REPLACE COMPRESSOR HOUSING WITH BEARING SUB-ASSEMBLY AND TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

1. Check for deformation or cracks in the mounting surfaces on the exhaust manifold converter sub-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 exhaust manifold converter sub-assembly mounting surface	B
   Deformation or cracks on the turbocharger sub-assembly mounting surface	C

Result: 

B 

REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

C 

REPLACE TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ] 

Result: 

A 

See step  10

1. Replace the exhaust pipe clamp and the gasket.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11

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 [10/2015 - 11/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [11/2017 - ] 

Result: 

NG 

REPLACE TURBINE HOUSING WITH VALVE SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - ]