Active Yaw Control (AYC) Bleeding

AYC BLEEDING

CAUTION:
At low temperature the fluid viscosity is so high that air bleeding becomes degenerated. Air bleeding should be done at normal temperatures {10 to 30°C (50 to 86°F)}.

1. Lift up the vehicle.

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. Turn the ignition switch to the "ON" position.

4. Set the steering wheel in the straight-ahead position.

5. Using the scan tool, forcibly activate the hydraulic unit (item No. 02). Actuator Test Reference Table.)
NOTE:

- Forced activation (air bleeding mode) is continued for 5 minutes, and then the operation is canceled automatically. Also, using the clear key on the scan tool, the forced activation can be canceled.
- When the functions are suspended by the fail-safe function, the hydraulic unit cannot be forcibly activated.





6. Remove the cap on the left of bleeder screw on the torque transfer mechanism, and connect the vinyl hose.
7. Gradually rotate the steering wheel at the straight-ahead position clockwise. Loosen the left side bleeder screw, and check that the air is bled with fluid.





8.
CAUTION:

- During the air bleeding, fill the fluid so that the fluid level constantly remains above the oil filter. If the fluid level becomes lower than the oil filter, an air layer will be generated. This causes the fluid level not to exceed the oil filter.
- When the fluid level drops under the oil filter, remove the trunk room side trim (RH) Service and Repair ), and pump the larger diameter-side of the reservoir hose to eliminate the air layer. Then fill up the fluid until its level exceeds the oil filter.

After the air bleeding, tighten the bleeder screw and set the steering wheel at the straight-ahead position.
9. Repeat Steps 6 and 7 for 2 or 3 times. After no air mixture is confirmed, tighten the bleeder screw to the specified torque.
Tightening torque: 9.0± 1.0Nm (80± 9 in-lb)
10. Perform Steps 5 to 8 for the right bleeder screw. Note to turn the steering wheel counterclockwise.
11. When the hydraulic unit is removed, perform air bleeding on the ACD side. Bleeding.)
12.
CAUTION:
If the air bleeding is insufficient, the noise from the hydraulic unit occurs, which may deteriorate the pump durability.

After the air bleeding, check the fluid level. (Refer to Active Yaw Control (AYC) Fluid Level Check.)