Active Yaw Control (AYC) Operation Check

AYC OPERATION CHECK

1. Lift up the vehicles.

2.
CAUTION:
Turn the ignition switch to the "LOCK (OFF)" position before connecting or disconnecting the scan tool.

Set the scan tool to the 16-pin data link connector. (Refer to Reading and Clearing Diagnostic Trouble Codes).

3. Start the engine.

4. Set the gear to the 2nd gear or above, operate the scan tool, and check from the data list (Item No. 24 and 25) that the wheel speed is within 10 - 20 km/h (6 - 12miles). Data List Reference Table.)
NOTE:

- Set the steering wheel to the neutral position.
- When turning the steering wheel, AYC operates continually (operation sound from the torque transfer mechanical part), but it is not system fault. In this case, set the steering wheel to the neutral position, and perform the following operations in order to stop the operation.
- Release the clutch.
- Set the gear to "Neutral".
- Stop the engine.

5. Operate the scan tool to drive the torque transfer mechanism part by the actuator test (item No. 06 and 07) forcibly. Actuator Test Reference Table.)
NOTE:

- Drive the clutch operating mode forcibly for 1 minute, release the operation automatically. Drive can also be cleared forcibly using the Clear key of the scan tool.
- If the hydraulic unit function has been stopped by fail-safe, the torque transfer differential cannot be forcibly driven.

6. Using the scan tool, check that each wheel speed is under the following conditions by the service data (item No. 24 and 25). Data List Reference Table.)

[Driving actuator test item No.06 forcibly (Refer to Actuator Test Reference Table .]
The left rear wheel is faster 2 km/h (1 mile/h) than right rear wheel.
[Driving actuator test item No.07 forcibly (Refer to Actuator Test Reference Table .]
The right rear wheel is faster 2 km/h (1 mile/h) than left rear wheel.

NOTE:
If the above are not satisfied, check the oil pressure as the system may be faulty.