Lack of Power (Turbocharger System) [12/2021 - ]: Procedure

1. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
2. Turn the ignition switch off and wait for at least 30 seconds.
3. Start the engine and wait 1 minute or more.
4. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC is output	B

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2021 - ] 

Result: 

A 

See step  2

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
   Oil leak from the contact surface between the compressor housing and the seal plate or between the seal plate and the bearing housing (B in the illustration)
   Oil leak from the compressor housing flange (C in the illustration)
   Soot adhering around the bushing (D in the illustration)	C

   HINT: 

   Perform "Inspection After Repair" after replacing the turbocharger sub-assembly.

   Refer to INITIALIZATION [12/2021 - ]

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

C 

See step  7

Result: 

A 

See step  3

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

   Refer to PROCEDURE - Step 2

   HINT: 

   If the turbine shaft catches, it could indicate poor sliding due to seal damage due to seizing or a deposit build-up.

   Result

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

Result: 

B 

See step  6

Result: 

A 

See step  4

1. Check for damage to the turbine wheel.
2. Check for interference between the turbine wheel and the turbine housing.

   Result

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

   HINT: 

   Perform "Inspection After Repair" after replacing the turbocharger sub-assembly.

   Refer to INITIALIZATION [12/2021 - ]

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

A 

See step  5

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

   Refer to PROCEDURE - Step 2

   HINT: 

   If there is 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

   HINT: 

   • If there no play or excessive play, it could indicate poor sliding due to seal damage due to seizing or a deposit build-up.
   • If there is no malfunction in the turbine shaft, the waste gate valve actuator, waste gate valve or turbine housing may be malfunctioning.

   Result

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

   HINT: 

   Perform "Inspection After Repair" after replacing the turbocharger sub-assembly.

   Refer to INITIALIZATION [12/2021 - ]

Result: 

A 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

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

   Result

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

   HINT: 

   Perform "Inspection After Repair" after replacing the turbocharger sub-assembly.

   Refer to INITIALIZATION [12/2021 - ]

Result: 

A 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

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

   HINT: 

   Perform "Inspection After Repair" after replacing the turbocharger sub-assembly.

   Refer to INITIALIZATION [12/2021 - ]

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2021 - ] 

Result: 

NG 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ]