Hydraulic Pressure Check

HYDRAULIC PRESSURE CHECK

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

2. Raise the vehicle.





3. Disconnect the hydraulic unit from the ACD pressure tube assembly. Then, connect the special tool below to the hydraulic unit side.

- Hose adapter (MB991705)
- Oil pressure gauge (MD998330)
4. Bleed the system. (Refer to Active Center Differential (ACD) Bleeding.)
5.
CAUTION:
Before connecting or disconnecting scan tool, always turn the ignition switch to the LOCK (OFF) position.

Connect scan tool to the data link connector. (Refer to Scan Tool Testing and Procedures.)
6. Turn the ignition switch to the "ON" position.
7. Perform the actuator test (item No. 05) of scan tool to forcibly activate ACD.
NOTE:

- The forced activation (item No. 05: ACD operation check mode) is continued for 1 minute, then it will be canceled automatically. Also, using the clear key on the scan tool, the activation can be forcibly canceled.
- When the ACD functions are stopped due to the fail-safe, the forced activation cannot be performed.

8.
CAUTION:
During the hydraulic pressure check, fill the fluid so that the fluid constantly remains in the oil reservoir.

Check that the generated hydraulic pressure of the hydraulic unit is within the standard value.
Standard valve: 0.9 - 1.1 MPa (130 - 159 psi)
9. If the measured value exceeds the standard value, replace the hydraulic unit.
10. After applying oil to the flare nut thread of ACD pressure tube assembly, connect the assembly to the hydraulic unit, then tighten to the specified torque.
Tightening torque: 26± 4Nm (19± 3 ft-lb)
11. Perform the air bleeding. (Refer to Bleeding.)