Bleeding
BLEEDINGCAUTION: If bleeding is not performed completely, noise may be produced from the hydraulic unit, or the durability of the pump, etc. may drop.
1. Lift up the vehicle.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Turn the ignition switch to the ON position.
4. Set the steering wheel in the straight-ahead position.
5. Perform the scan tool actuator test (Item No.01), and forcibly drive the hydraulic unit.
NOTE:
^ The actuator test (Item No. 01: Bleeding Mode) will be performed for 5 minutes, after which it will be cleared automatically. Drive can also be cleared during forced driving using the clear key of the scan tool MB991958.
^ If the hydraulic unit function has been stopped by fail-safe, the hydraulic unit cannot be forcibly driven.
6. Remove the cap of the bleeder screw on the transfer, and connect the vinyl hose.
CAUTION: During bleeding, replenish the fluid so that some always remains in the oil reservoir.
7. Slowly turn the steering wheel to the left or right from the neutral state. Loosen the bleeder screw, and check that air is discharged together with the fluid.
8. After the air is discharged, tighten the bleeder screw, and return the steering wheel to the neutral state.
9. Repeat steps 6 and 7 several 2 to 3 times, and after checking that no more air mixes in, tighten the bleeder screw at the specified torque.
Tightening torque: 5 ± 1 Nm (44 ± 9 inch lbs.)
10. After bleeding, check the fluid level.