Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Zero Point Calibration of Steering Angle Sensor Not Acquired (X20D8)

DESCRIPTION

Code	Tester Display	Measurement Item	Trouble Area
X20D8	Zero Point Calibration of Steering Angle Sensor Not Acquired	History of being unable to obtain the steering angle zero point	Sensor installation Yaw rate and acceleration sensor (airbag sensor assembly)*1 Yaw rate and acceleration sensor*2

CAUTION / NOTICE / HINT

NOTICE:

This Vehicle Control History may be output during situations when the steering angle sensor zero point calibration temporarily cannot be acquired, such as when the stop light is stuck ON.

PROCEDURE

1.	CHECK DTC (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.	CHECK VEHICLE SPECIFICATION

(a) Check the combination meter assembly.

Click here

Result	Proceed to
for Optitron Meter Type	A
for TFT Meter Type	B

B

GO TO STEP 8

A

3.	CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION

(a) Turn the engine switch off.

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

Click here

OK:

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

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

NG

GO TO STEP 7

OK

4.	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.

HINT:

When driving at a speed of 15 km/h or more for 1 second or more, the slip indicator light turns off.

NEXT

5.	CLEAR VEHICLE CONTROL HISTORY

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

Chassis > Brake/EPB > Utility

Tester Display
Vehicle Control History (RoB)

NEXT

6.	CHECK VEHICLE CONTROL HISTORY

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Using the Techstream, check for Vehicle Control History.

Chassis > Brake/EPB > Utility

Tester Display
Vehicle Control History (RoB)

Result	Proceed to
X20D8 is not output.	A
X20D8 is output.	B

A

END

B

REPLACE AIRBAG SENSOR ASSEMBLY

7.	INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

Click here

NEXT

GO TO STEP 5

8.	CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) Turn the engine switch off.

(b) Check that the yaw rate and acceleration sensor has been installed properly.

Click here

OK:

The yaw rate and acceleration sensor is tightened to the specified torque.

The yaw rate and acceleration sensor is not installed in a tilted position.

NG

GO TO STEP 12

OK

9.	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.

HINT:

When driving at a speed of 15 km/h or more for 1 second or more, the slip indicator light turns off.

NEXT

10.	CLEAR VEHICLE CONTROL HISTORY

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

Chassis > Brake/EPB > Utility

Tester Display
Vehicle Control History (RoB)

NEXT

11.	CHECK VEHICLE CONTROL HISTORY

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Using the Techstream, check for Vehicle Control History.

Chassis > Brake/EPB > Utility

Tester Display
Vehicle Control History (RoB)

Result	Proceed to
X20D8 is not output.	A
X20D8 is output.	B

A

END

B

REPLACE YAW RATE AND ACCELERATION SENSOR

12.	INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY

Click here

NEXT

GO TO STEP 10