Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (See INITIALIZATION ).

PERFORM ZERO POINT CALIBRATION OF YAW RATE AND DECELERATION SENSOR
1. Perform zero point calibration of the yaw rate and deceleration sensor (See CALIBRATION ).
  HINT:
  - When the stored zero point of the yaw rate and deceleration sensor is erased, steering angle sensor zero point will also be erased.
  - If the zero point and output value of the yaw rate and deceleration sensor and the output value of the speed sensors are not normal, steering angle sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 22 mph (35 km/h) or more.
CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION
1. Drive the vehicle straight ahead at 22 mph (35 km/h) or more for at least 5 seconds.
2. 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 deceleration sensor zero point again after the adjustments are completed.
OK: The centered position of the steering wheel is correctly set.

NG: ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION

OK: Go to next step

RECONFIRM DTC

Turn the ignition switch off.
Clear the DTC (See DTC CHECK / CLEAR ).
Start the engine.
Drive the vehicle and turn the steering wheel to the right and left at the speed of 22 mph (35 km/h) or more.
Check that the same DTC is recorded (See DTC CHECK / CLEAR ).

Result

RESULT CHART

Condition	Proceed to
DTC is not output	A
DTC is output	B

B: REPLACE SKID CONTROL ECU

A: END