1. Remove the vacuum hose..
2. Verify that air can be blown from the power brake unit side of the vacuum hose towards the vacuum pump side, and that air cannot be blown in the opposite direction.

If there is any malfunction of the inner check valve, replace it together with the vacuum hose as a single unit.
Vacuum Hose Removal/Installation
Vacuum Pump InspectionTorque Converter Clutch (TCC) Control Solenoid [Fw6 A EL, Fw6 Ax EL]
Purpose/Function
The torque converter clutch (TCC) control solenoid adjusts the hydraulic
pressure in the TCC control circuit based on the current demand from the TCM
according to the vehicle conditions.
Construction
The TCC control solenoid is installed to the solenoid con ...
Power Window Motor
Purpose
The power window motor transmits rotation force to the power window regulator
to open/close the door glass.
Function
The power window motor rotates clockwise/counterclockwise when it receives an
open/close signal from the power window main switch or the power window subswitch.
Constr ...
Global Positioning System (Gps) Antenna
Purpose, Function
The GPS antenna receives signals sent from GPS satellites and sends them
to the car navigation unit.
NOTE:
GPS (Global Positioning System) was developed by the Pentagon (U.S.A.) as
an object locating system using satellites. The GPS antenna receives signa ...