Removal & Installation (Sienna)

Remove 2 cowl top vent louvers and outer front cowl top panel. See Fig 1. Remove master cylinder. See MASTER CYLINDER .
Remove ABS actuator assembly. Disconnect vacuum hose from power brake unit. Remove lower instrument panel finish panels to access brake pedal arm. Remove Cruise Control Engine Control Unit (ECU). Remove pedal return spring, clip and clevis pin.
Remove 4 nuts and clevis, and remove power brake unit.
Install power brake unit. Attach clevis pin, clip and return spring. Install Cruise Control Engine Control Unit (ECU). Adjust push rod length. See POWER BRAKE UNIT PUSH ROD under ADJUSTMENTS.
Install master cylinder with NEW gasket. Connect vacuum hose. Fill master cylinder. Bleed system and check for leads. Adjust brake pedal, if necessary. Install cowl panel and vent louvers.

Fig 1: Exploded View Of Power Brake Unit & Cowl Components (Sienna)