Check for manifold vacuum at the open port on the vacuum check valve.
Is manifold vacuum present at the open port on the vacuum check valve?
H4 CHECK THE VACUUM CHECK VALVE
Ignition OFF.
Connect the vacuum pump to the open ports on the vacuum check valve and attempt to pull a vacuum.
Can a vacuum be pulled on the vacuum check valve?
Yes
GO to
H5
.
No
INSTALL a new vacuum check valve
(19A563). TEST the system for normal
operation.
H5 CHECK THE VACUUM RESERVOIR LINE FOR BLOCKAGE
Disconnect the vacuum reservoir line at the vacuum reservoir.
Connect the vacuum pump to the vacuum reservoir line at the vacuum check valve connection and attempt to pull a vacuum.
Can a vacuum be pulled on the vacuum reservoir line?
Yes
REPAIR or INSTALL a new vacuum
reservoir line. TEST the system for normal
operation.
No
GO to
H6
.
H6 CHECK THE VACUUM RESERVOIR LINE FOR LEAKS
Plug the vacuum reservoir line at the vacuum reservoir connection.
Leak test the vacuum reservoir line using the vacuum pump.
Does the vacuum reservoir line leak?
Yes
REPAIR or INSTALL a new vacuum
reservoir line. TEST the system for normal
operation.
No
GO to
H7
.
H7 CHECK THE VACUUM RESERVOIR FOR A LEAK
Connect the vacuum pump reservoir line to the vacuum reservoir.
With the vacuum pump connected to the vacuum reservoir line, leak test the vacuum reservoir.
Does the vacuum reservoir leak?
Yes
INSTALL a new vacuum reservoir
(19A566). TEST the system for normal
operation.
No
GO to
H8
.
H8 CHECK THE FUNCTION SELECTOR SWITCH VACUUM SOURCE LINE FOR BLOCKAGE
Disconnect the function selector switch vacuum connector.
Connect the vacuum pump to the function selector switch vacuum source line and attempt to pull a vacuum.
Yes
REPAIR or INSTALL a new function
Page 21 of 47
2003 Taurus/Sable Workshop Manual
11/22/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/...
