Ford Taurus 2003 - Page 13

 Is the voltage between 4.7 and 5.1 volts?
B3 CHECK CIRCUIT 790 (WH/OG) FOR AN OPEN
 Ignition OFF.
 Disconnect: RCC Module C228.
 Measure the resistance between the RCC module C228 pin 23, circuit 790 (WH/OG) and the in-vehicle temperature
sensor C233, circuit 790 (WH/OG).
 Is the resistance less than 5 ohms?
Yes
GO to B4.
No
REPAIR circuit 790 (WH/OG) for an open. TEST
the system for normal operation.
B4 CHECK CIRCUIT 470 (PK/BK) FOR AN OPEN
NOTE: When carrying out tests, allow time for resistance measurement to stabilize.
 Measure the resistance between the RCC module C228 pin 15, circuit 470 (PK/BK) and the in-vehicle temperature
sensor C233, circuit 470 (PK/BK).
 Is the resistance less than 5 ohms?
Yes
INSTALL a new RCC module. TEST the system
for normal operation.
No
REPAIR circuit 470 (PK/BK) for an open. TEST
the system for normal operation.
B5 CHECK CIRCUIT 790 (WH/OG) FOR A SHORT TO CIRCUIT 470 (PK/BK)
 Ignition OFF.
 Disconnect: RCC Module C228.
 Measure the resistance between the in-vehicle temperature sensor C233, circuit 790 (WH/OG) and circuit 470 (PK/BK).
 Is the resistance greater than 10,000 ohms?
Yes
GO to B6.
No
REPAIR circuit 790 (WH/OG) for a short to circuit
470 (PK/BK). TEST the system for normal
operation.
B6 CHECK CIRCUIT 790 (WH/OG) FOR A SHORT TO GROUND
 Measure the resistance between the RCC module C228 pin 23, circuit 790 (WH/OG) and ground.
 Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new RCC module. TEST the system
for normal operation.
No
REPAIR circuit 790 (WH/OG) for a short to
ground. TEST the system for normal operation.
Page
13
of
47
2003 Taurus/Sable Workshop Manual
11/22/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/
...