Section 70 (Electronic - Active Height Control): Bleeding
WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
While the fluid is being discharged, the vehicle height is lowered suddenly.
NOTE:
If any work is done on the Active Height Control (AHC) system or if air is suspected in the AHC lines, bleed the system of air.
NOTE:
When the reservoir tank is empty, or after the AHC pump and motor is replaced or removed, starting the engine may cause air to flow into the AHC fluid line. In this condition, the AHC system can not be operated even if the fluid is poured into the tank. If this happens, raise the vehicle height of the front or rear wheel by conducting the active test and activate the AHC pump and motor for about 10 seconds. See TEST D: HEIGHT CONTROL OPERATION TEST (ACTIVE TEST) under SYSTEM TESTS.
- With the engine stopped, pour Suspension Fluid AHC into the reservoir tank.
- Start the engine and push vehicle height select switch to select "N" mode.
- After vehicle height adjustment is complete, check that AHC pump motor is stopped and then stop the engine.
- Connect bleeder hose with suitable container to bleeder plug for either right or left damping force control actuator. See Fig 1.
- Loosen bleeder plug.
- When the emulsified fluid containing air is discharged, tighten the bleeder plug to specification. See TORQUE SPECIFICATIONS .
- Perform steps 5 and 6 for damping force control actuator on the rear side.
- Repeat the procedure for left and right damping force control actuators alternately.
- Start the engine with vehicle parked on a level place. Adjust the suspension to N position with the vehicle unloaded.
- Check that fluid level in the reservoir tank is within standard range. See Fig 2.