Is the resistance less than 21 ohms?
K10 CHECK THE VOLTAGE AT THE FUNCTION SELECTOR SWITCH
Ignition OFF.
Remove the climate control assembly. Refer to
Section 412-04
.
Disconnect: Function Selector Switch C294b.
Ignition ON.
Measure the voltage between the function selector switch C294b pin 1, circuit 1087 (OG) and
ground.
Is the voltage greater than 10 volts?
Yes
GO to
K11
.
No
REPAIR circuit 1087 (OG). TEST the system for normal operation.
K11 CHECK CIRCUIT 348 (VT) FOR AN OPEN
Ignition OFF.
Measure the resistance between the function selector switch C294b pin 2, circuit 348 (VT) and
the low charge switch C130 pin 1, circuit 348 (VT).
Is the resistance less than 5 ohms?
Yes
INSTALL a new function selector switch. REFER to
Section 412-04
.
TEST the system for normal operation.
No
REPAIR circuit 348 (VT). TEST the system for normal operation.
K12 CHECK CIRCUIT 348 (VT) FOR AN OPEN
Ignition OFF.
Measure the resistance between the RCC C228 pin 13, circuit 348 (VT) and the low charge
switch C130 pin 1, circuit 348 (VT).
Is the resistance less than 5 ohms?
Yes
INSTALL a new RCC module. REFER to
Section 412-04
. TEST the
system for normal operation.
No
REPAIR circuit 348 (VT). TEST the system for normal operation.
K13 CHECK THE A/C SYSTEM PRESSURE
Ignition OFF.
Connect the manifold gauge set. Refer to
Manifold Gauge Set Connection
in this section.
Is the pressure reading between 345 kPa (50 psi) and 1724 kPa (250 psi)?
Yes
INSTALL a new low charge switch. TEST the system for normal
operation.
No
CHECK the system for refrigerant leaks. REFER to
Electronic Leak
Detection
and Fluorescent Dye Leak Detection in this section.
K14 CHECK THE A/C PRESSURE CUTOFF SWITCH
Ignition OFF.
Connect a fused jumper lead between the A/C pressure cutoff switch C1062 pin 4, circuit 441
(RD/YE) and pin 1, circuit 879 (DG/WH).
Yes
INSTALL a new A/C pressure cutoff switch (19D594). TEST the system
for normal operation.
No
GO to
K15
.
Page 29 of 47
2003 Taurus/Sable Workshop Manual
11/22/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/...
