Toyota Avalon (XX50): Rear Axle Hub

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

Components

COMPONENTS

ILLUSTRATION

*1	NO. 2 PARKING BRAKE WIRE ASSEMBLY	*2	REAR AXLE HUB AND BEARING ASSEMBLY
*3	REAR DISC	*4	REAR DISC BRAKE CALIPER ASSEMBLY
*5	REAR FLEXIBLE HOSE	*6	REAR DISC BRAKE DUST COVER SUB-ASSEMBLY
	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 rear 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 REAR AXLE HUB AND BEARING ASSEMBLY

(a) Install the rear axle hub and bearing assembly and rear disc brake dust cover sub-assembly to the rear axle carrier sub-assembly with the 4 bolts.

Torque:

90 N·m {918 kgf·cm, 66 ft·lbf}

2. INSPECT REAR AXLE HUB BEARING LOOSENESS

Click here

3. INSPECT REAR AXLE HUB RUNOUT

Click here

4. INSTALL REAR DISC

Click here

5. INSTALL REAR DISC BRAKE CALIPER ASSEMBLY

Click here

6. CONNECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Connect the No. 2 parking brake wire assembly connector to the parking brake actuator assembly.

(b) Connect the No. 2 parking brake wire assembly connector to the rear axle hub and bearing assembly.

7. INSTALL REAR WHEEL

Click here

8. 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

9. 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 rear axle hub and bearing 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 rear 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 REAR WHEEL

Click here

4. DISCONNECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

Click here

5. SEPARATE REAR DISC BRAKE CALIPER ASSEMBLY

Click here

6. REMOVE REAR DISC

Click here

7. INSPECT REAR AXLE HUB BEARING LOOSENESS

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

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 rear axle hub and bearing assembly.

HINT:

If the looseness exceeds the maximum, replace the rear axle hub and bearing assembly.

8. INSPECT REAR AXLE HUB RUNOUT

(a) Using a dial indicator with magnetic base, check for runout on the surface of the rear axle hub outside the rear 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 install the tip of the dial indicator towards the outside of the rear axle hub bolts.
Keep the magnet of the dial indicator away from the rear axle hub and bearing assembly.

HINT:

If the runout exceeds the maximum, replace the rear axle hub and bearing assembly.

9. INSTALL REAR DISC

Click here

10. INSTALL REAR DISC BRAKE CALIPER ASSEMBLY

Click here

11. CONNECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

Click here

12. INSTALL REAR 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

for HV Model:

When removing or installing the rear 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 REAR WHEEL

Click here

4. DISCONNECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Disconnect the No. 2 parking brake wire assembly connector from the parking brake actuator assembly.

NOTICE:

Remove any dirt or foreign matter on and around the No. 2 parking brake wire assembly connector before performing this step.
Do not allow water, oil or dirt to enter the No. 2 parking brake wire assembly connector.

(b) Using a screwdriver with its tip wrapped with protective tape, disconnect the No. 2 parking brake wire assembly connector from the rear axle hub and bearing assembly.

NOTICE:

Be careful not to damage the rear axle hub and bearing assembly or connector cover.

*a	Protective Tape

5. SEPARATE REAR DISC BRAKE CALIPER ASSEMBLY

Click here

6. REMOVE REAR DISC

Click here

7. REMOVE REAR AXLE HUB AND BEARING ASSEMBLY

(a) Remove the 4 bolts, rear axle hub and bearing assembly and rear disc brake dust cover sub-assembly from the rear axle carrier sub-assembly.

Rear Axle Hub Bolt

Steering Knuckle

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