On-Vehicle Service: 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)}.
- Raise the vehicle.
- Remove the engine room under cover front B assembly. (Refer to UNDER COVER .)
- Remove the bleeder screw cap of the transfer, then connect the vinyl hose.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 HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) .)
- Position the steering wheel in a straight ahead direction.
- Turn the ignition switch to the "ON" position.
- Perform the actuator test (item No. 01) of scan tool to forcibly activate the hydraulic unit.
NOTE:
- The forced activation (item No. 01: Air bleeding mode) is continued for 5 minutes, then it will be cancelled automatically. Also, using the clear key on the scan tool, the activation can be forcibly cancelled.
- When the hydraulic unit functions are stopped due to the fail-safe, the forced activation cannot be performed.
- From the straight-ahead position, gradually rotate the steering wheel to the right or left. Loosen the bleeder screw, and check that the air is bled with fluid.CAUTION:
- Keep the fluid level above the oil filter while air-bleeding. If you fail to do so, an "air layer" will be present below the oil filter. This can cause the fluid not to be added below the oil filter.
- If the fluid level should have decreased below the oil filter, squeeze and release the feed hose so that the fluid should be added below the oil filter.
- After bleeding the air, tighten the bleeder screw.
- Repeat Steps 7 and 8 for two to three times. After checking that air mixing is eliminated, tighten the bleeder screw to the specified torque.
Tightening torque: 5.0 ± 1.0 N.m (44 ± 9 in-lb)
CAUTION: If the air bleeding is insufficient, the noise from the hydraulic unit occurs, which may deteriorate the pump durability. - After the air bleeding is complete, check the fluid level. (Refer to ON-VEHICLE SERVICE .)
- Install the engine room under cover front B assembly. (Refer to UNDER COVER .)