Active Yaw Control (AYC) Oil Pressure Check

OIL PRESSURE CHECK

Required Special Tools:

- MB991705: Hose adaptor
- MD998330: Oil pressure gauge Remover

1. Remove the rear wheel (RH) and then rear wheel house splash shield. Service and Repair.)

2. Lift up the vehicles.

3.
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).

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





5. Disconnect the hydraulic unit and the AYC pressure tube assembly, connect the special tools MB991705, MD998330 to LH side port, put the lid to RH side port or connect the AYC pressure tube disconnected.
6. Using the scan tool, forcibly activate the hydraulic unit (item No. 06). Actuator Test Reference Table.)
NOTE:

- Forced activation (left clutch operation mode) is continued for 1 minutes, and then the operation is canceled automatically. Also, using the clear key on the scan tool, the activation can be forcibly canceled.
- When the functions are suspended by the fail-safe function, the hydraulic unit cannot be forcibly activated.

7.
CAUTION:
While the oil pressure is checked, add fluid as necessary to ensure that it is left in the oil reservoir during the entire procedure.

Check that the generated oil pressure of the hydraulic unit satisfies the standard value.
Standard value: 0.9 - 1.1 MPa (130 - 159 psi)
8. Check the oil pressure of the clutch right side following step 4 through 6. Connect the special tool to RH side port, put the lid to LH side port or connect AYC pressure tube assembly disconnected.
9. Using the scan tool, forcibly activate the hydraulic unit (item No. 07). Actuator Test Reference Table.)
10. If the measured value exceeds the standard value, replace the hydraulic unit.
11. Connect the hydraulic unit and AYC pressure tube assembly, and tighten them to the specified torque.
Tightening torque: 26± 4Nm (19± 3 ft-lb)
12. Connect the AYC differential torque transfer mechanism and AYC pressure tube assembly, and tighten them to the specified torque.
Tightening torque: 21± 3Nm (16± 2 ft-lb)
13. Perform the AYC air bleeding. (Refer to Active Yaw Control (AYC) Bleeding.)