Vacuum Supply
Mode
| Port 1
| Port 2
| Port 3
| Port 4
| Port 5
| Port 6
| See Remarks
|
DEFINITION: This table shows the state of the vacuum supply at the vacuum
ports shown in the Vacuum Routing Diagram for each operating mode. The port
numbers are located on the bottom of the vacuum electrical solenoid.
|
OFF/AUTO
| VAC
| VENT
| VAC
| VENT
| VENT
| VAC
| A, B
|
AUTO
| --
| --
| --
| --
| --
| --
| C
|
PANEL
| VENT
| VAC
| VENT
| VENT
| --
| VAC
| D
|
BI-LEV
| VENT
| VENT
| VAC
| VENT
| --
| VAC
| D
|
LOWER
| VAC
| VENT
| VAC
| VENT
| --
| VAC
| D
|
BLEND
| VAC
| VENT
| VENT
| VENT
| VENT
| VAC
| --
|
DEF
| VAC
| VENT
| VENT
| VAC
| VENT
| VAC
| --
|
A. The mode switch is in the
AUTO position and the blower switch is in the OFF position.
|
B. When the mode switch is in a manual override position
and the blower switch is in the OFF position, the vacuum supply will be the
same as the manual mode of operation.
|
C. The mode switch
and the blower switch are in the AUTO position. The Electronic Climate Control
(ECC) Module will range between PANEL, BI-LEVEL and LOWER modes.
|
D. The vacuum supply to port five is controlled by the
recirculate air button. Vacuum is supplied to port five when the LED is ON.
|
NOTE: No source vacuum, insufficient source vacuum, or
an improperly routed vacuum supply will cause air delivery to be improper.
Refer to
Air Delivery Improper
in HVAC Systems - Automatic for proper diagnosis.
|
