On-Vehicle Service: Bleeding
CAUTION:
If bleeding is not performed completely, noise may be produced from the hydraulic unit, or the durability of the pump, etc. may drop.
- 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.
- Connect scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Set the steering wheel in the straight-ahead position.
- 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.
- 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.
- 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.
- After the air is discharged, tighten the bleeder screw, and return the steering wheel to the neutral state.
- 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 N.m (44 +/- 9 in-lb)
- After bleeding, check the fluid level. (Refer to FLUID CHECK ).