Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Actuator

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

It will be necessary to bleed the system using Toyotas ABS actuator checker and adapter harness. Refer to the actuator system bleeding procedure.

The hydraulic actuator contains the solenoid valve as well as the bypass and cut valves for the brake circuit. The solenoid controls the flow of power steering fluid into control circuits. The power steering fluid within these circuits act on pistons which move the bypass and cut valves, controlling the flow of brake fluid. The actuator is located at the lower right front of the engine compartment.



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Fig. Fig. 1: Exploded view of the ABS actuator components

  1. Disconnect both battery cables, negative cable first. Remove the battery and tray.
  2.  
  3. Disconnect the electrical harness at the actuator.
  4.  



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Fig. Fig. 2: Unplug the actuator harness

  1. Disconnect the two brake lines from the actuator. Plug the lines to prevent fluid loss and the entry of dirt.
  2.  



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Fig. Fig. 3: Using a line wrench, disconnect the brake lines leading to the actuator

  1. Turn the steering wheel clockwise until it locks. Remove the union (banjo) bolts holding the power steering pressure hoses to the actuator. It may be easier to work through the wheel house instead of from the top.
  2.  
  3. Disconnect the power steering hose(s).
  4.  
  5. Remove the bolt holding the power steering hose clamp or retainer.
  6.  
  7. Remove the 3 bolts holding the actuator bracket to the body. Remove the actuator and bracket together.
  8.  



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Fig. Fig. 4: After the actuator is removed, the bracket can be separated from it

  1. Remove the bracket from the actuator on the workbench.
  2.  

To install:
  1. Reinstall the bracket to the actuator; tighten the 3 bolts to 9 ft. lbs. (13 Nm).
  2.  
  3. Install the actuator to the vehicle; install the front retaining bolt first, then the middle one and then the rear most one. Tighten each to 21 ft. lbs. (28 Nm) when it is installed.
  4.  
  5. Using new gaskets, connect the pressure unions. Tighten each bolt to 34 ft. lbs. (47 Nm).
  6.  
  7. Connect the power steering hose(s) and secure the hose clamp(s).
  8.  
  9. Install the retaining clamp and tighten the bolt.
  10.  
  11. Connect the 2 brake lines to the actuator. Connect the painted line to the painted actuator port first. Tighten the lines to 11 ft. lbs. (15 Nm).
  12.  
  13. Attach the electrical harness to the actuator.
  14.  
  15. Install the battery and tray; connect the cables.
  16.  
  17. Fill the brake fluid and power steering reservoirs with the correct fluid.
  18.  
  19. Bleed the brake system and power steering system.
  20.  

 
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