Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Removal

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

(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.

(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) 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.

(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.

(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.

(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.

(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.

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

*a

Hold

Turn

*a

Hold

Turn

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

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

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

(a) Remove the camshaft timing exhaust gear assembly.

(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.

(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.

(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.

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

*a

Hold

Turn

*a

Hold

Turn

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

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

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

(a) Remove the camshaft timing exhaust gear assembly.

(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.