Toyota Avalon (XX50): Front Axle Hub

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Drivetrain / Axle And Differential / Front Axle Hub

Components

COMPONENTS

ILLUSTRATION

*A	w/o AVS	-	-
*1	FRONT AXLE ASSEMBLY	*2	FRONT AXLE SHAFT NUT
*3	FRONT DISC	*4	FRONT DISC BRAKE CALIPER ASSEMBLY
*5	FRONT DRIVE SHAFT ASSEMBLY	*6	FRONT LOWER NO. 1 SUSPENSION ARM SUB-ASSEMBLY
*7	FRONT SPEED SENSOR	*8	TIE ROD ASSEMBLY
*9	FRONT SHOCK ABSORBER ASSEMBLY	*10	COTTER PIN
*11	FRONT FLEXIBLE HOSE	-	-
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": Nm (kgfcm, ft.*lbf)		Nm (kgfcm, ft.*lbf): Specified torque
●	Non-reusable part		Toyota Body Grease W
	Do not apply lubricants to the threaded parts	-	-

ILLUSTRATION

*A	w/ AVS	-	-
*1	FRONT AXLE ASSEMBLY	*2	FRONT AXLE SHAFT NUT
*3	FRONT DISC	*4	FRONT DISC BRAKE CALIPER ASSEMBLY
*5	FRONT DRIVE SHAFT ASSEMBLY	*6	FRONT LOWER NO. 1 SUSPENSION ARM SUB-ASSEMBLY
*7	FRONT SPEED SENSOR	*8	TIE ROD ASSEMBLY
*9	FRONT SHOCK ABSORBER ASSEMBLY	*10	COTTER PIN
*11	FRONT FLEXIBLE HOSE	-	-
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": Nm (kgfcm, ft.*lbf)		Nm (kgfcm, ft.*lbf): Specified torque
●	Non-reusable part		Toyota Body Grease W
	Do not apply lubricants to the threaded parts	-	-

ILLUSTRATION

*1	FRONT AXLE HUB SUB-ASSEMBLY	*2	STEERING KNUCKLE
*3	FRONT DISC BRAKE DUST COVER	-	-
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping" : Nm (kgfcm, ft.*lbf)	-	-

Installation

INSTALLATION

CAUTION / NOTICE / HINT

for HV Model:

When removing or installing the front disc brake caliper assembly, pushing back the disc brake piston may cause a large clearance between the brake pads and brake disc. When the brake pedal is depressed with a large clearance between the brake pads and the brake disc, DTC C1214 related to abnormal brake fluid pressure may be stored. Make sure to clear any DTCs after performing this procedure.
While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or any door courtesy switch turns on. Therefore, when servicing the brake system components, do not operate the brake pedal or open/close the doors while the auxiliary battery is connected.

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

PROCEDURE

1. INSTALL FRONT AXLE HUB SUB-ASSEMBLY

(a) Secure the steering knuckle between aluminum plates in a vise.

NOTICE:

Do not overtighten the vise.

(b) Install the front axle hub sub-assembly and front disc brake dust cover to the steering knuckle with the 4 bolts.

Torque:

120 N·m {1224 kgf·cm, 89 ft·lbf}

NOTICE:

Be careful not to damage the speed sensor rotor or contact surfaces.
Do not allow foreign matter to contact the speed sensor rotor or contact surfaces.

2. INSTALL FRONT AXLE ASSEMBLY

(a) Apply 0.1 to 0.3 g (0.00353 to 0.0105 oz) of Toyota Body Grease W to each of the 4 areas shown in the illustration.

Toyota Body Grease W

(b) Install the front axle assembly to the front shock absorber assembly with the 2 bolts and 2 nuts.

Torque:

290 N·m {2957 kgf·cm, 214 ft·lbf}

NOTICE:

Do not apply lubricants to the steering knuckle and shock absorber contact surfaces.
When installing the nuts, keep the bolts from rotating.

HINT:

The bolts can be installed in either direction, however, make sure that they are both installed in the same direction.

3. INSTALL FRONT DRIVE SHAFT ASSEMBLY

(a) Align the matchmarks on the front drive shaft assembly and front axle hub sub-assembly, and connect the front drive shaft assembly to the front axle assembly.

NOTICE:

Do not push the front axle assembly towards the outside of the vehicle any further than necessary.
Check that there is no foreign matter on the speed sensor rotor or contact surfaces.
Do not damage the front drive shaft outboard joint boot.
Do not damage the front disc brake dust cover.
Do not damage the speed sensor rotor.

Matchmark

4. CONNECT FRONT LOWER NO. 1 SUSPENSION ARM SUB-ASSEMBLY

(a) Connect the front lower No. 1 suspension arm sub-assembly to the front lower ball joint assembly with the bolt and 2 nuts.

Torque:

92 N·m {938 kgf·cm, 68 ft·lbf}

5. CONNECT TIE ROD ASSEMBLY

for HV Model: Click here

for Gasoline Model: Click here

6. INSTALL FRONT DISC

Click here

7. INSTALL FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

8. INSTALL FRONT AXLE SHAFT NUT

(a) Clean the threaded parts on the front drive shaft assembly and a new front axle shaft nut using non-residue solvent.

NOTICE:

Be sure to perform this work even when using a new front drive shaft assembly.
Keep the threaded parts free of oil and foreign matter.

(b) Using a 30 mm deep socket wrench, while applying the brakes, temporarily install the front axle shaft nut.

Torque:

294 N·m {2998 kgf·cm, 217 ft·lbf}

NOTICE:

Stake the front axle shaft nut after inspecting for looseness and runout in the following steps.

HINT:

Keep depressing the brake pedal to prevent the front drive shaft from rotating.

9. SEPARATE FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

10. REMOVE FRONT DISC

Click here

11. INSPECT FRONT AXLE HUB BEARING LOOSENESS

Click here

12. INSPECT FRONT AXLE HUB RUNOUT

Click here

13. INSTALL FRONT DISC

Click here

14. INSTALL FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

15. INSTALL FRONT SPEED SENSOR (w/o AVS)

(a) Engage the 2 hooks to install the front speed sensor clamp bracket.

Hook

NOTICE:

Do not twist the front speed sensor when installing it.

(b) Install the front speed sensor and front flexible hose to the front shock absorber assembly with the bolt.

Torque:

29 N·m {296 kgf·cm, 21 ft·lbf}

NOTICE:

Do not twist the front flexible hose when installing it.

Torque:

8.5 N·m {87 kgf·cm, 75 in·lbf}

NOTICE:

Prevent foreign matter from attaching to the front speed sensor tip.
Firmly insert the front speed sensor body into the steering knuckle before tightening the bolt.
After installing the front speed sensor to the steering knuckle, make sure that there is no clearance between the front speed sensor stay and steering knuckle. Also make sure that no foreign matter is stuck between the parts.
Do not twist the front speed sensor when installing it.

(d) Engage the clamp.

NOTICE:

Do not twist the front speed sensor when installing it.

16. INSTALL FRONT SPEED SENSOR (w/ AVS)

(a) Engage the 2 hooks to install the front speed sensor clamp bracket.

Hook

NOTICE:

Do not twist the front speed sensor when installing it.

(b) Install the front speed sensor and front flexible hose to the front shock absorber assembly with the bolt.

Torque:

29 N·m {296 kgf·cm, 21 ft·lbf}

NOTICE:

Do not twist the front flexible hose when installing it.

Torque:

Bolt (A) :

8.5 N·m {87 kgf·cm, 75 in·lbf}

Bolt (B) :

29 N·m {296 kgf·cm, 21 ft·lbf}

NOTICE:

Prevent foreign matter from attaching to the front speed sensor tip.
Firmly insert the front speed sensor body into the steering knuckle before tightening the bolt.
After installing the front speed sensor to the steering knuckle, make sure that there is no clearance between the front speed sensor stay and steering knuckle. Also make sure that no foreign matter is stuck between the parts.
Do not twist the front speed sensor when installing it.

(d) Connect the AVS connector to the absorber control actuator.

17. STAKE FRONT AXLE SHAFT NUT

(a) Using a chisel and hammer, stake the front axle shaft nut.

18. INSTALL FRONT WHEEL

Click here

19. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL (for HV Model)

(a) Connect the reservoir level switch connector.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Click here

(d) Depress the brake pedal and release it.

(e) Clear the DTCs.

Click here

20. INSPECT AND ADJUST FRONT WHEEL ALIGNMENT

Click here

21. CHECK FOR SPEED SENSOR SIGNAL

for HV Model: Click here

for Gasoline Model: Click here

On-vehicle Inspection

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during front axle hub sub-assembly on-vehicle inspection are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced (for HV Model:)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
*: When performing learning using the Techstream. Click here
Auxiliary 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*
		Lighting System (for HV Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System
	Memorize steering angle neutral point	Panoramic View Monitor System

for HV Model:

When removing or installing the front disc brake caliper assembly, pushing back the disc brake piston may cause a large clearance between the brake pads and brake disc. When the brake pedal is depressed with a large clearance between the brake pads and the brake disc, DTC C1214 related to abnormal brake fluid pressure may be stored. Make sure to clear any DTCs after performing this procedure.
While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or any door courtesy switch turns on. Therefore, when servicing the brake system components, do not operate the brake pedal or open/close the doors while the auxiliary battery is connected.

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

PROCEDURE

1. PRECAUTION (for HV Model)

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here

2. DISABLE BRAKE CONTROL (for HV Model)

Click here

3. REMOVE FRONT WHEEL

Click here

4. SEPARATE FRONT FLEXIBLE HOSE

Click here

5. SEPARATE FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

6. REMOVE FRONT DISC

Click here

7. INSPECT FRONT AXLE HUB BEARING LOOSENESS

(a) Using a dial indicator with magnetic base, check for looseness near the center of the front axle hub sub-assembly.

Maximum Looseness:

0.05 mm (0.00196 in.)

NOTICE:

Ensure that the dial indicator is set perpendicular to the measurement surface.
Keep the magnet of the dial indicator away from the front axle hub sub-assembly and front speed sensor.

HINT:

If the looseness exceeds the maximum, replace the front axle hub sub-assembly.

8. INSPECT FRONT AXLE HUB RUNOUT

(a) Using a dial indicator with magnetic base, check for runout on the surface of the front axle hub sub-assembly outside the front axle hub bolts.

Maximum Runout:

0.05 mm (0.00196 in.)

NOTICE:

Ensure that the dial indicator is set perpendicular to the measurement surface.
Make sure to set the tip of the dial indicator towards the outside of the front axle hub bolts.
Keep the magnet of the dial indicator away from the front axle hub sub-assembly and front speed sensor.

HINT:

If the runout exceeds the maximum, replace the front axle hub sub-assembly.

9. INSTALL FRONT DISC

Click here

10. INSTALL FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

11. INSTALL FRONT FLEXIBLE HOSE

Click here

12. INSTALL FRONT WHEEL

Click here

13. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL (for HV Model)

(a) Connect the reservoir level switch connector.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Click here

(d) Depress the brake pedal and release it.

(e) Clear the DTCs.

Click here

Removal

REMOVAL

CAUTION / NOTICE / HINT

Necessary Procedures After Parts Removed/Installed/Replaced (for HV Model:)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
*: When performing learning using the Techstream. Click here
Auxiliary 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*
		Lighting System (for HV Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System
	Memorize steering angle neutral point	Panoramic View Monitor System
Front wheel alignment adjustment	Clear zero point calibration data. Perform yaw rate and acceleration sensor zero point calibration.	DTCs are stored ABS warning light illuminates Brake warning light / yellow (minor malfunction) illuminates Slip indicator light illuminates VSC disabled or malfunctions

Necessary Procedures After Parts Removed/Installed/Replaced (for Gasoline Model:)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Front wheel alignment adjustment	Perform system variant learning and acceleration sensor zero point calibration.	VSC disabled or malfunctioning DTCs are output Slip indicator light illuminated ABS warning light illuminated

for HV Model:

When removing or installing the front disc brake caliper assembly, pushing back the disc brake piston may cause a large clearance between the brake pads and brake disc. When the brake pedal is depressed with a large clearance between the brake pads and the brake disc, DTC C1214 related to abnormal brake fluid pressure may be stored. Make sure to clear any DTCs after performing this procedure.
While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or any door courtesy switch turns on. Therefore, when servicing the brake system components, do not operate the brake pedal or open/close the doors while the auxiliary battery is connected.

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

PROCEDURE

1. PRECAUTION (for HV Model)

NOTICE:

Click here

2. DISABLE BRAKE CONTROL (for HV Model)

Click here

3. REMOVE FRONT WHEEL

Click here

4. REMOVE FRONT AXLE SHAFT NUT

Click here

5. SEPARATE FRONT SPEED SENSOR (w/o AVS)

(a) Remove the bolt and separate the front speed sensor and front flexible hose from the front shock absorber assembly.

NOTICE:

Be sure to separate the front speed sensor and front flexible hose from the front shock absorber assembly completely.

(b) Remove the bolt, disengage the clamp and separate the front speed sensor from the front shock absorber assembly and steering knuckle.

NOTICE:

Prevent foreign matter from contacting the sensor tip.
Be careful not to damage the front speed sensor.
Clean the speed sensor installation hole and the contact surfaces every time the front speed sensor is removed.

6. SEPARATE FRONT SPEED SENSOR (w/ AVS)

(a) Remove the bolt and separate the front speed sensor and front flexible hose from the front shock absorber assembly.

NOTICE:

Be sure to separate the front speed sensor and front flexible hose from the front shock absorber assembly completely.

(b) Disconnect the AVS connector from the absorber control actuator.

NOTICE:

Prevent foreign matter from contacting the sensor tip.
Be careful not to damage the front speed sensor.
Clean the speed sensor installation hole and the contact surfaces every time the speed sensor is removed.

7. SEPARATE TIE ROD ASSEMBLY

for HV Model: Click here

for Gasoline Model: Click here

8. SEPARATE FRONT DISC BRAKE CALIPER ASSEMBLY

Click here

9. REMOVE FRONT DISC

Click here

10. SEPARATE FRONT LOWER NO. 1 SUSPENSION ARM SUB-ASSEMBLY

(a) Remove the bolt and 2 nuts and separate the front lower No. 1 suspension arm sub-assembly from the front lower ball joint assembly.

11. SEPARATE FRONT DRIVE SHAFT ASSEMBLY

(a) Put matchmarks on the front drive shaft assembly and the front axle hub sub-assembly.

Matchmark

(b) Using a plastic hammer, separate the front drive shaft assembly from the front axle assembly.

NOTICE:

Do not damage the front drive shaft outboard joint boot.
Do not push the front axle assembly towards the outside of the vehicle any further than necessary.

HINT:

If it is difficult to separate the front drive shaft assembly from the front axle assembly, tap the end of the front drive shaft assembly using a brass bar and a hammer.

12. REMOVE FRONT AXLE ASSEMBLY

(a) Remove the 2 bolts, 2 nuts and front axle assembly from the front shock absorber assembly.

NOTICE:

When removing the nuts, keep the bolts from rotating.

13. REMOVE FRONT AXLE HUB SUB-ASSEMBLY

(a) Secure the front axle assembly between aluminum plates in a vise.

NOTICE:

Do not overtighten the vise.

(b) Remove the 4 bolts, front axle hub sub-assembly and front disc brake dust cover from the steering knuckle.

NOTICE:

Do not drop the front axle hub sub-assembly.
Be careful not to damage the speed sensor rotor or contact surfaces.
Do not allow foreign matter to contact the speed sensor rotor or contact surfaces.

Front Axle Hub Bolt

Rear Axle Carrier

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Can Communication System(for Gasoline Model): Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When communication fails in any of the CAN bus lines (communication lines), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning. (b) The following table shows the e ...