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 |
|
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 |
|
| 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 | - |
| 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 |
|
| 3. | CHECK AIRBAG ECU ASSEMBLY INSTALLATION |
(a) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.
Click here .gif)
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 |
|
| 4. | CLEAR VEHICLE CONTROL HISTORY |
(a) Using the Techstream, clear the Vehicle Control History.
Chassis > Brake > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
|
| 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
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:
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
spark plug removal/installation are shown below.
Necessary Procedures After Parts Removed/Instal
Front Recognition Camera Heater Malfunction (C1AAE00)
DESCRIPTION The forward recognition camera controls the flow of current to the forward recognition with heater hood sub-assembly. If the forward recognition camera detects a malfunction in the forward recognition with heater hood sub-assembly circuit, it will store this DTC. DTC No. Detection I
