Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YL23
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: A25A-FXS (ENGINE MECHANICAL): CAMSHAFT: REMOVAL; 2022 MY Avalon HV [08/2021 -        ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during camshaft removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

Auxiliary battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Tracing Assist System

2022 MY Avalon Avalon HV [08/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

Pre-collision System

Intelligent clearance sonar system*

Lighting System (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking assist monitor system

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM(for HV Model): INITIALIZATION

Panoramic view monitor system

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM (for HV Model): INITIALIZATION

Replacement of ECM

Perform Vehicle Identification Number (VIN) registration

MIL illuminates

2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

  • Gas leak from exhaust system is repaired
  • Replacement of throttle body with motor assembly
  • Cleaning the deposits from the throttle body assembly
  • Replacement of cam timing control motor with EDU assembly
  • Removal and installation of a cam timing control motor with EDU assembly
  • Replacement of camshaft timing gear assembly
  • Removal and installation of a camshaft timing gear assembly
  • Replacement of camshaft (for intake or exhaust camshaft)
  • Replacement of camshaft timing exhaust gear assembly
  • Replacement of fuel pump assembly (for high pressure side)
  • Replacement of ignition coil assembly

Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.

2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

  • *: When performing learning using the Techstream.

    Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for HV Model): CALIBRATION

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (for High Pressure)

Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (FUEL): FUEL PUMP (for High Pressure): REMOVAL

2. DISCONNECT AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY

(a) Disengage the 2 clamps and disconnect the air conditioning tube and accessory assembly.

3. DISCONNECT ENGINE WIRE

(a) Disconnect the 6 connectors.

(b) Disengage the 3 clamps and disconnect the engine wire.

4. REMOVE IGNITION COIL ASSEMBLY

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): IGNITION COIL AND SPARK PLUG: REMOVAL+

5. REMOVE CAMSHAFT POSITION SENSOR (for Intake Side)

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT POSITION SENSOR: REMOVAL+

6. REMOVE CAMSHAFT POSITION SENSOR (for Exhaust Side)

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT POSITION SENSOR: REMOVAL+

7. REMOVE CAM TIMING OIL CONTROL SOLENOID ASSEMBLY

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT OIL CONTROL SOLENOID: REMOVAL+

8. REMOVE O-RING

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT OIL CONTROL SOLENOID: REMOVAL+

9. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT OIL CONTROL VALVE: REMOVAL+

10. REMOVE CAM TIMING CONTROL MOTOR WITH EDU ASSEMBLY

Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT TIMING CONTROL MOTOR: REMOVAL+

11. REMOVE CAM TIMING CONTROL MOTOR O-RING

Click here 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): CAMSHAFT TIMING CONTROL MOTOR: REMOVAL+

12. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY

Click here 2020 - 2022 MY Avalon HV [08/2019 -        ]; A25A-FXS (ENGINE MECHANICAL): ENGINE UNIT: DISASSEMBLY+

13. REMOVE SPARK PLUG TUBE GASKET

Click here 2020 - 2022 MY Avalon HV [08/2019 -        ]; A25A-FXS (ENGINE MECHANICAL): ENGINE UNIT: DISASSEMBLY+

14. REMOVE FUEL PUMP LIFTER GUIDE

Click here 2020 - 2022 MY Avalon HV [08/2019 -        ]; A25A-FXS (ENGINE MECHANICAL): ENGINE UNIT: DISASSEMBLY+

15. SET NO. 1 CYLINDER TO TDC (COMPRESSION)

(a) Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley assembly with the "0" timing mark on the No. 2 timing chain cover assembly.

*a

Paint Mark

*b

Timing Mark

*c

"0" Timing Mark

(b) Check that the timing marks are positioned as shown in the illustration.

HINT:

If the timing marks are not positioned as shown in the illustration, turn the crankshaft clockwise and then align them again.

(c) Place paint marks on the chain sub-assembly at points aligned with the timing marks on the camshaft timing gear assembly and camshaft timing exhaust gear assembly.

16. REMOVE STRAIGHT SCREW PLUG

Click here 2020 - 2022 MY Avalon HV [08/2019 -        ]; A25A-FXS (ENGINE MECHANICAL): ENGINE UNIT: DISASSEMBLY+

17. REMOVE CAMSHAFT

(a) Rotate the crankshaft approximately 15° clockwise.

*a

Approximately 15°

(b) Rotate the crankshaft approximately 15° counterclockwise.

*a

Approximately 15°

(c) Align the pin hole of the No. 1 chain tensioner assembly with the pin hole of the chain tensioner slipper, and then insert the pin.

*a

Pin

*b

Pin Hole (No. 1 Chain Tensioner Assembly Side)

*c

Pin Hole (Chain Tensioner Slipper Side)

(d) Using the hexagonal portion of the No. 2 camshaft, secure the No. 2 camshaft.

NOTICE:

Do not damage the camshaft housing sub-assembly, cylinder head sub-assembly and spark plug tube.

*a

Hold

(e) Remove the 2 bolts from the camshaft timing exhaust gear assembly.

(f) Using the hexagonal portion of the camshaft, secure the camshaft.

*a

Hold

Turn

NOTICE:

  • Do not damage the camshaft housing sub-assembly, cylinder head sub-assembly and spark plug tube.
  • Do not disassemble the camshaft timing gear assembly.

(g) Using a 10 mm bi-hexagon socket wrench, remove the bolt from the camshaft timing gear assembly.

(h) Using the hexagonal portion of the No. 2 camshaft, loosen and hold the chain sub-assembly while moving the No. 2 camshaft in the direction shown in the illustration.

*a

Hold

-

-

Turn

-

-

(i) Move the camshaft timing gear assembly together with the camshaft timing exhaust gear assembly and chain sub-assembly toward the No. 2 timing chain cover assembly as shown in the illustration.

*1

Camshaft Timing Gear Assembly

*2

Camshaft Timing Exhaust Gear Assembly

*3

Chain Sub-assembly

-

-

Remove in this Direction

-

-

(j) Remove the camshaft timing exhaust gear assembly from the chain sub-assembly.

(k) Remove the camshaft timing gear assembly from the chain sub-assembly.

(l) Secure the chain sub-assembly to the vehicle using rope, etc.

NOTICE:

Do not drop the chain sub-assembly into the timing chain cover assembly.

(m) Uniformly loosen and remove the 8 bolts in the order shown in the illustration.

(n) Uniformly loosen and remove the 14 bolts in the order shown in the illustration.

NOTICE:

Uniformly loosen the bolts while holding the camshaft horizontally.

*1

No. 1 Camshaft Bearing Cap

*2

No. 2 Camshaft Bearing Cap

*3

No. 3 Camshaft Bearing Cap

*4

No. 4 Camshaft Bearing Cap

(o) Remove the No. 1 camshaft bearing cap, No. 2 camshaft bearing cap, 2 No. 3 camshaft bearing caps and No. 4 camshaft bearing cap.

HINT:

Arrange the removed parts so that they can be reinstalled in their original locations.

(p) Remove the camshaft from the camshaft housing sub-assembly.

(q) Remove the No. 2 camshaft from the camshaft housing sub-assembly.