Lexus ES manuals

Lexus ES: Yaw Rate Sensor Wrong Installation (X0456)

DESCRIPTION

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

Code

Tester Display

Measurement Item

Trouble Area

X0456

Yaw Rate Sensor Wrong Installation

History of yaw rate sensor (airbag ECU assembly) being installed incorrectly

  • Yaw rate sensor (airbag ECU assembly) installed improperly
  • Yaw rate sensor (airbag ECU assembly)

PROCEDURE

1.

CHECK FOR DTCs (HEALTH CHECK)

(a) Perform the Health Check using the Techstream.

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

2.

READ VALUE USING TECHSTREAM (YAW RATE SENSOR VALUE)

(a) Check Data List item "yaw rate sensor value".

Chassis > Brake > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Yaw Rate Sensor Value

Yaw rate sensor

Min.: -128°/s, Max.: 127°/s

Vehicle stopped: 0°/s

Turning right: -128 to 0°/s

Turning left: 0 to 127°/s

-

Chassis > Brake > Data List

Tester Display

Yaw Rate Sensor Value

Result

Proceed to

NG (The yaw rate and acceleration sensor (airbag ECU assembly) output value is 0°/s when the vehicle is stationary, but the value fluctuates when turning.)

A

NG (The yaw rate and acceleration sensor (airbag ECU assembly) output value is not 0°/s when the vehicle is stationary.)

B

OK

C

B

REPLACE AIRBAG ECU ASSEMBLY

C

USE SIMULATION METHOD TO CHECK

A

3.

CHECK AIRBAG ECU ASSEMBLY INSTALLATION

(a) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.

Click here

OK:

The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.

The yaw rate and acceleration sensor (airbag ECU assembly) is not installed in a tilted position.

NG

INSTALL AIRBAG ECU ASSEMBLY

OK

4.

CLEAR VEHICLE CONTROL HISTORY

(a) Using the Techstream, clear the Vehicle Control History.

Chassis > Brake > Utility

Tester Display

Vehicle Control History (RoB)

NEXT

5.

PERFORM ZERO POINT CALIBRATION OF STEERING ANGLE SENSOR

(a) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.

NEXT

END

READ NEXT:

 Zero Point Calibration of Steering Angle Sensor Initialization Malfunction (X208A)

DESCRIPTION Code Tester Display Measurement Item Trouble Area X208A Zero Point Calibration of Steering Angle Sensor Initialization Malfunction History of failure in acquiring steering

 Electronically Controlled Brake System (for Hv Model)

 Abnormal Brake Pedal Response on First Depression

DESCRIPTION If the vehicle has been stopped without opening or closing the driver door for a long period of time, the electronically controlled brake system will not be ready and sufficient fluid pres

SEE MORE:

 Low Pressure Fuel System Pressure - Too High (P008B00)

DESCRIPTION Refer to DTC P008A00. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P008B00 Low Pressure Fuel System Pressure - Too High Actual fuel pressure (for low pressure side) value higher than target fuel pressure (for low pressure

 Installation

INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. INSTALL OUTER MIRROR CONTROL ECU ASSEMBLY (a) Install the outer mirror control ECU assembly with the 2 screws. (b) Connect the 2 connectors.

© 2016-2025 Copyright www.lexguide.net