Toyota Avalon Service & Repair Manual: Removal

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

Battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane departure alert system (w/ Steering Control)

Pre-collision system

Intelligent Clearance Sonar System*1

Lighting System (for Gasoline Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

Panoramic View Monitor System

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

ECU communication ID registration (Immobiliser system)

Engine start function

  • Replacement of throttle body with motor assembly
  • Cleaning the deposits from the throttle body with motor assembly
  • Replacement of camshaft (for intake or exhaust camshaft)
  • Replacement of camshaft timing gear assembly
  • Replacement of camshaft timing exhaust gear assembly
  • Replacement of fuel injector assembly (for port injection)
  • Replacement of fuel injector assembly (for direct injection)
  • Replacement of fuel pump assembly (for high pressure side)
  • Replacement of ignition coil assembly
  • Air leaks from intake system
  • Gas leak from exhaust system is repaired

Inspection after repair

  • Poor idle, etc.
  • Engine start function, etc.

Replacement of automatic transaxle assembly

  • Perform reset memory
  • Input transaxle compensation code into ECM
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

for Initialization

for Registration

Replacement of ECM

(If transaxle compensation code read from ECM)

  • Perform reset memory*2
  • Transfer transaxle compensation code
  • Perform road test to allow ECM to learn

Replacement of ECM

(If transaxle compensation code not read from ECM)

  • Perform reset memory*2
  • Reset transaxle compensation code
  • Perform road test to allow ECM to learn

Replacement of automatic transaxle fluid

ATF thermal degradation estimate reset

The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

Replacement of ECM

Code registration (Smart Key System (for Start Function))

  • Wireless Door Lock Control System
  • Smart Key System (for Entry Function)
  • Smart Key System (for Start Function)
  • Steering lock function

Suspension, tires, etc.

  • Measure ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent Clearance Sonar System
  • Intuitive Parking Assist System

Rear television camera assembly optical axis adjustment (Back camera position setting)

Parking Assist Monitor System

for Initialization

for Calibration

  • Parking assist ECU initialization
  • Adjust steering angle
  • Television camera assembly optical axis adjustment (Back camera position setting)

Panoramic View Monitor System

for Initialization

for Calibration

Perform headlight ECU sub-assembly LH initialization

Lighting system (for Gasoline Model with Cornering Light)

Front wheel alignment adjustment

Perform system variant learning and acceleration sensor zero point calibration.

  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates

  • *1: When performing learning using the Techstream.

    Click here

  • *2: Not necessary when ECM replaced with new one.

PROCEDURE

1. INSTALL ENGINE ASSEMBLY TO ENGINE STAND

Click here

2. REMOVE ENGINE HANGERS

Click here

3. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY

Click here

4. DISCONNECT VENTILATION HOSE

Click here

5. DISCONNECT PURGE VALVE (PURGE VSV)

Click here

6. REMOVE NO. 2 SURGE TANK STAY

Click here

7. REMOVE INTAKE AIR SURGE TANK ASSEMBLY

Click here

8. REMOVE AIR SURGE TANK TO INTAKE MANIFOLD GASKET

Click here

9. REMOVE IGNITION COIL ASSEMBLY

Click here

10. REMOVE VACUUM PUMP ASSEMBLY

Click here

11. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE

Click here

12. REMOVE WIRE HARNESS CLAMP BRACKET

Click here

13. REMOVE WATER FILLER BRACKET

Click here

14. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 1)

Click here

15. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 1)

Click here

16. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 2)

Click here

17. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 2)

Click here

18. REMOVE VVT SENSOR (for Intake Side of Bank 1)

Click here

19. REMOVE VVT SENSOR (for Exhaust Side of Bank 1)

Click here

20. REMOVE VVT SENSOR (for Intake Side of Bank 2)

Click here

21. REMOVE VVT SENSOR (for Exhaust Side of Bank 2)

Click here

22. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY

Click here

23. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH

Click here

24. REMOVE SPARK PLUG TUBE GASKET

Click here

25. REMOVE TIMING CHAIN COVER PLATE

Click here

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

(a) Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.

*a

Timing Mark (Cutout)

*b

"0" Timing Mark

(b) Check that the timing marks of the camshaft timing gear assemblies are aligned with the timing marks of the camshaft bearing caps as shown in the illustration.

HINT:

If the marks are not aligned, turn the crankshaft again to align the marks.

*A

for Bank 2

*B

for Bank 1

*a

Timing Mark

*b

Paint Mark

(c) Place paint marks on the timing marks and sprockets of each camshaft timing gear assembly and on the links of the chain sub-assembly.

HINT:

Be sure to place the paint marks on 2 links of the chain sub-assembly and on the sprockets of the camshaft timing gear assemblies at the locations of the timing marks of the camshaft timing gear assemblies.

27. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY

(a) Turn the crankshaft approximately 30° counterclockwise so that there is some slack in the chain sub-assembly.

HINT:

This prevents the valves and pistons from interfering with each other.

(b) Align the hole in the lever of the No. 1 chain tensioner assembly with the hole in the tensioner body as shown in the illustration, and then insert a pin with a diameter of 1.0 mm (0.0394 in.) into the hole.

NOTICE:

Check that the pin is locked.

*a

Lever Hole

*b

Tensioner Body

*c

Pin

(c) Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.

*a

Timing Mark (Cutout)

*b

"0" Timing Mark

(d) Remove the 2 bolts and No. 1 chain tensioner assembly from the cylinder head sub-assembly.

NOTICE:

Do not drop the No. 1 chain tensioner assembly or bolts into the timing chain cover assembly.

28. DISCONNECT CHAIN SUB-ASSEMBLY (for Bank 1)

(a) Turn the crankshaft clockwise until it is in the position shown in the illustration so that there is some slack in the chain sub-assembly between the banks.

CAUTION:

As the camshafts may turn suddenly, do not touch the camshafts or camshaft timing gears.

HINT:

When turning the crankshaft, engine oil may spray out of the oil holes.

(b) Turn the crankshaft clockwise until it is in the position shown in the illustration so that the chain sub-assembly can be removed easily.

HINT:

When turning the crankshaft, engine oil may spray out of the oil holes.

*a

5 to 10°

(c) Remove the chain sub-assembly from the sprocket of the camshaft timing gear assembly and set it on the camshaft timing gear assembly.

CAUTION:

As the camshaft may turn suddenly and pinch your fingers when the chain sub-assembly is removed, pinch the chain sub-assembly and lift it upward to remove it from the sprocket.

29. SEPARATE NO. 2 CHAIN TENSIONER ASSEMBLY

(a) Remove the bolt to separate the No. 2 chain tensioner assembly from the camshaft housing sub-assembly.

30. REMOVE CAMSHAFT TIMING GEAR BOLT (for Intake Side of Bank 1)

(a) Use a wrench to hold the hexagonal portion of the camshaft and remove the camshaft timing gear bolt from the camshaft timing gear assembly.

*a

Hold

Turn

NOTICE:

  • Be careful not to damage the camshaft, camshaft housing sub-assembly or spark plug tube with the wrench.
  • If the camshaft timing gear bolt has been struck or dropped, replace it.

31. REMOVE CAMSHAFT TIMING GEAR BOLT (for Exhaust Side of Bank 1)

(a) Use a wrench to hold the hexagonal portion of the No. 2 camshaft and remove the camshaft timing gear bolt from the camshaft timing exhaust gear assembly.

NOTICE:

  • Be careful not to damage the No. 2 camshaft, camshaft housing sub-assembly or spark plug tube with the wrench.
  • If the camshaft timing gear bolt has been struck or dropped, replace it.

*a

Hold

Turn

32. REMOVE CAMSHAFT BEARING CAP (for Bank 1)

(a) Slide the camshaft timing gear assembly and camshaft timing exhaust gear assembly as shown in the illustration.

(b) Remove the bolts and camshaft bearing caps in the order shown in the illustration. Immediately after removing a camshaft bearing cap, install replacement bolts and washers in the order shown in the illustration.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

NOTICE:

  • Do not install the camshaft bearing caps when installing replacement bolts and washers.
  • Be sure to follow the numerical order when performing this procedure.
  • Do not allow replacement bolts or washers to contact the camshaft.
  • Do not drop replacement bolts or washers into the cylinder head sub-assembly.

HINT:

  • Arrange the removed parts so that they can be reinstalled in their original locations.
  • Part number for replacement bolts: 91551-F0850 (9 bolts)
  • Part number for replacement washers: 90201-12028 (18 washers)

*a

Replacement Bolt and Washer

*b

Part Removal

*c

Replacement Bolt and Washer Installation

33. REMOVE NO. 2 CAMSHAFT

(a) While lifting up the camshaft timing exhaust gear assembly, remove the No. 2 chain tensioner assembly.

(b) Lift up the rear of the No. 2 camshaft so that it is at an angle.

(c) Pull the No. 2 camshaft as shown in the illustration to remove it from the camshaft timing exhaust gear assembly.

34. REMOVE CAMSHAFT

(a) Lift up the rear of the camshaft so that it is at an angle.

(b) Pull the camshaft as shown in the illustration to remove it from the camshaft timing gear assembly.

35. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY (for Bank 1)

(a) Remove the camshaft timing exhaust gear assembly.

36. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 1)

(a) Remove the camshaft timing gear assembly and No. 2 chain sub-assembly.

NOTICE:

Do not drop the chain sub-assembly into the gap between the engine and timing chain cover assembly.

(b) Suspend the chain sub-assembly with a string or equivalent.

37. DISCONNECT CHAIN SUB-ASSEMBLY (for Bank 2)

(a) Turn the crankshaft counterclockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.

*a

Timing Mark (Cutout)

*b

"0" Timing Mark

(b) Remove the chain sub-assembly from the sprocket of the camshaft timing gear assembly and set it on the camshaft timing gear assembly.

CAUTION:

As the camshaft may turn suddenly and pinch your fingers when the chain sub-assembly is removed, pinch the chain sub-assembly and lift it upward to remove it from the sprocket.

38. SEPARATE NO. 3 CHAIN TENSIONER ASSEMBLY

(a) Remove the bolt to separate the No. 3 chain tensioner assembly from the camshaft housing sub-assembly LH.

39. REMOVE CAMSHAFT TIMING GEAR BOLT (for Intake Side of Bank 2)

(a) Use a wrench to hold the hexagonal portion of the No. 3 camshaft sub-assembly and remove the camshaft timing gear bolt from the camshaft timing gear assembly.

*a

Hold

Turn

NOTICE:

  • Be careful not to damage the No. 3 camshaft sub-assembly, camshaft housing sub-assembly LH or spark plug tube with the wrench.
  • If the camshaft timing gear bolt has been struck or dropped, replace it.

40. REMOVE CAMSHAFT TIMING GEAR BOLT (for Exhaust Side of Bank 2)

(a) Use a wrench to hold the hexagonal portion of the No. 4 camshaft sub-assembly and remove the camshaft timing gear bolt from the camshaft timing exhaust gear assembly.

*a

Hold

Turn

NOTICE:

  • Be careful not to damage the No. 4 camshaft sub-assembly, camshaft housing sub-assembly LH or spark plug tube with the wrench.
  • If the camshaft timing gear bolt has been struck or dropped, replace it.

41. REMOVE CAMSHAFT BEARING CAP (for Bank 2)

(a) Slide the camshaft timing gear assembly and camshaft timing exhaust gear assembly as shown in the illustration.

(b) Remove the bolts and camshaft bearing caps in the order shown in the illustration. Immediately after removing a camshaft bearing cap, install replacement bolts and washers in the order shown in the illustration.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

NOTICE:

  • Do not install the camshaft bearing caps when installing replacement bolts and washers.
  • Be sure to follow the numerical order when performing this procedure.
  • Do not allow replacement bolts or washers to contact the camshaft.
  • Do not drop replacement bolts or washers into the cylinder head LH.

HINT:

  • Arrange the removed parts so that they can be reinstalled in their original locations.
  • Part number for replacement bolts: 91551-F0850 (8 bolts)
  • Part number for replacement washers: 90201-12028 (16 washers)

*a

Replacement Bolt and Washer

*b

Part Removal

*c

Replacement Bolt and Washer Installation

42. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY

(a) While lifting up the camshaft timing exhaust gear assembly, remove the No. 3 chain tensioner assembly.

(b) Lift up the rear of the No. 4 camshaft sub-assembly so that it is at an angle.

(c) Pull the No. 4 camshaft sub-assembly as shown in the illustration to remove it from the camshaft timing exhaust gear assembly.

43. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY

(a) Lift up the rear of the No. 3 camshaft sub-assembly so that it is at an angle.

(b) Pull the No. 3 camshaft sub-assembly as shown in the illustration to remove it from the camshaft timing gear assembly.

44. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY (for Bank 2)

(a) Remove the camshaft timing exhaust gear assembly.

45. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 2)

(a) Remove the camshaft timing gear assembly and No. 2 chain sub-assembly.

NOTICE:

Do not drop the chain sub-assembly into the gap between the engine and timing chain cover assembly.

(b) Suspend the chain sub-assembly with a string or equivalent.

    Installation

    Cylinder Block

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