Ford Taurus 2003 - Page 10

 Are the resistances less than 5 ohms?
A8 CHECK CIRCUIT 250 (OG) AND 249 (DB/LG) FOR A SHORT TOGETHER
 Measure the resistance between RCC module C228 pin 22, circuit 250 (OG) and RCC module C228 pin 21,
circuit 249 (DB/LG).
 Is the resistance less than 5 ohms?
Yes
INSTALL a new door actuator. REFER to Section 412-04.
TEST the system for normal operation.
No
REPAIR circuit 250 (OG) and circuit 249 (DB/LG) for a
short together. TEST the system for normal operation.
A9 CHECK THE FEEDBACK POTENTIOMETER TOTAL RESISTANCE
 Ignition OFF.
 Measure the resistance between RCC module C228 pin 5, circuit 436 (RD/LG) and RCC module C228 pin 20,
circuit 438 (RD/WH).
 Is the resistance between 5,000 and 6,000 ohms?
Yes
GO to A12.
No
If the resistance is greater than 6,000 ohms, GO to A10 .
If the resistance is less than 5,000 ohms, GO to A11 .
A10 CHECK CIRCUITS 436 (RD/LG) AND 438 (RD/WH) FOR AN OPEN
 Disconnect: Temperature Blend Door Actuator C289.
 Measure the resistance between RCC module C228 pin 5, circuit 436 (RD/LG) and the temperature blend door
actuator C289 pin 6, circuit 436 (RD/LG). Measure the resistance between RCC module C228 pin 20, circuit 438
(RD/WH) and the temperature blend door actuator C289 pin 5, circuit 438 (RD/WH).
 Are the resistances less than 5 ohms?
Yes
INSTALL a new temperature blend door actuator. REFER
to Section 412-04. TEST the system for normal operation.
No
REPAIR the affected circuit for an open. TEST the system
for normal operation.
A11 CHECK CIRCUIT 438 (RD/WH) FOR A SHORT TO CIRCUIT 436 (RD/LG)
 Disconnect: Temperature Blend Door Actuator C289.
 Measure the resistance between RCC module C228 pin 20, circuit 438 (RD/WH) and RCC module C228 pin 5,
circuit 436 (RD/LG).
 Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new temperature blend door actuator
(19E616). REFER to Section 412-04. TEST the system
for normal operation.
No
REPAIR circuits 438 (RD/WH) for a short to circuit 436
(RD/LG). TEST the system for normal operation.
Page
10
of
47
2003 Taurus/Sable Workshop Manual
11/22/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/
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