Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR
CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION
DTC C1290/66 Steering Angle Sensor Zero Point Malfunction
DESCRIPTION
The skid control ECU acquires steering angle sensor zero point every time the engine switch is turned on (IG) and the vehicle is driven at 22 mph (35 km/h) or more for approximately 5 seconds. The ECU also stores the previous zero point.
If front wheel alignment or steering wheel position is adjusted without disconnecting the negative battery terminal, or if yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.
Warning of the steering angle sensor zero point malfunction will be cancelled by turning the engine switch off.
DTC No. | DTC Detection Condition | Trouble Area |
C1290/66 | The steering angle sensor zero point calibration position vastly differs from the recorded value | Yaw rate and acceleration sensor zero point calibration incomplete Poor adjustment of the centered position of the steering wheel Poor adjustment of front wheel alignment |
INSPECTION PROCEDURE
- NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration .
1.PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
Perform zero point calibration of the yaw rate and acceleration sensor .
- HINT:
NEXT | |
2.CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION |
Drive the vehicle straight ahead at 22 mph (35 km/h) or more for at least 5 seconds.
Check that the centered position of the steering wheel is correctly set while driving straight ahead.
- HINT:
- If front wheel alignment and steering position are adjusted as a result of abnormal centered position of the steering wheel, acquire yaw rate and acceleration sensor zero point again after the adjustments are completed.
- OK:
- The centered position of the steering wheel is correctly set.
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OK | |
3.RECONFIRM DTC |
Turn the engine switch off.
Clear the DTC .
Check if the same DTC is recorded .
- Result:
Condition Proceed to DTC (C1290/66) is not output A DTC (C1290/66) is output B
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A | ||
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