Toyota Avalon (XX50): Knock Sensor

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Knock Sensor

Components

COMPONENTS

ILLUSTRATION

*1	KNOCK CONTROL SENSOR (for Bank 1)	*2	KNOCK CONTROL SENSOR (for Bank 2)
	Nm (kgfcm, ft.*lbf): Specified torque	*	For use with a union nut wrench

Inspection

INSPECTION

PROCEDURE

1. INSPECT KNOCK CONTROL SENSOR

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	25°C (77°F)	120 to 280 kΩ

If the result is not as specified, replace the knock control sensor.

*a	Component without harness connected (Knock Control Sensor)

Installation

INSTALLATION

PROCEDURE

1. INSTALL KNOCK CONTROL SENSOR

HINT:

Perform "Inspection After Repair" after replacing a knock control sensor.

Click here

(a) Temporarily install the 2 knock control sensors to the cylinder block sub-assembly with the 2 bolts so that the knock control sensor installation position is as shown in the illustration.

*A	for Bank 1
*B	for Bank 2
*a	View A
*b	View B
*c	Top
*d	Engine Front
*e	Engine Rear
*f	5°
*g	10°
	Engine Front
	View A
	View B

NOTICE:

If a knock control sensor has been struck or dropped, replace it.
Make sure that the knock control sensor is installed in the correct position.

(b) Tighten the bolt (A).

Torque:

20 N·m {204 kgf·cm, 15 ft·lbf}

*a	Torque Wrench Fulcrum Length
*b	10 mm Union Nut Wrench

Torque:

Specified tightening torque :

20 N·m {204 kgf·cm, 15 ft·lbf}

HINT:

Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.
Click here
When using a 10 mm union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):
17.6 N*m (179 kgf*cm, 13 ft.*lbf)

(d) Connect the 2 knock control sensor connectors.

2. INSTALL FUEL DELIVERY PIPE

Click here

3. PERFORM INITIALIZATION

(a) Perform "Inspection After Repair" after replacing a knock control sensor.

Click here

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 knock control sensor removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
*: When performing learning using the Techstream. Click here
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 Gasoline Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System
	Memorize steering angle neutral point	Panoramic View Monitor System
Replacement of fuel injector assembly (for Port Injection) Replacement of fuel injector assembly (for Direct Injection) Replacement of throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Replacement of knock control sensor	Inspection after repair	Poor idle, etc. Engine start function, etc.

PROCEDURE

1. REMOVE FUEL DELIVERY PIPE

Click here

2. REMOVE KNOCK CONTROL SENSOR

(a) Disconnect the 2 knock control sensor connectors.

*A	for Bank 1
*B	for Bank 2

(b) Remove the 2 bolts and 2 knock control sensors from the cylinder block sub-assembly.

NOTICE:

If a knock control sensor has been struck or dropped, replace it.

Ignition System

Mass Air Flow Meter

See More:

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