PINPOINT TEST G: THE EATC SYSTEM IS INOPERATIVE, INTERMITTENT OR INCORRECT OPERATION
Ignition ON.
Measure the voltage between the RCC module pin 10, circuit 298 (VT/OG) and ground.
Is the voltage greater than 10 volts?
Yes
REFER to Section 418-00 to diagnose the network concern.
No
REPAIR circuit 298 (VT/OG). TEST the system for normal operation.
Test Step Result / Action to Take
G1 VERIFY AUTOMATIC OPERATION
Ignition ON.
With the engine running, press the AUTOMATIC button.
Does AUTO and the selected temperature appear in the display window?
Yes
GO to G2.
No
GO to G11.
G2 PERFORM THE EATC MODULE SELF-TEST
Ignition ON.
Carry out the remote climate control module self-test. Refer to the Electronic Automatic Temperature
Control Module Self-Test in this section. Record the DTCs displayed, if any.
Were any DTCs displayed as a result of the EATC self-test?
Yes
REFER to the RCC Module Diagnostic Trouble Code (DTC)
Index. CARRY OUT the necessary diagnosis and REPAIR as
required.
No
GO to G3.
G3 CHECK THE VACUUM FLUORESCENT DISPLAY
Exit self-test by pressing the DEFROST button. Observe the function symbols displayed on the vacuum
fluorescent display.
Is the display correct and complete without any missing elements?
Yes
GO to G4.
No
INSTALL a new RCC module. TEST the system for normal
operation.
G4 CHECK THE BLOWER MANUAL OVERRIDE OPERATION
Slowly rotate the blower motor speed override control from LO to HI.
Does the blower motor speed increase smoothly from low speed to high speed?
Yes
GO to G5.
No
If the blower motor is inoperative, GO to Pinpoint Test O.
If the blower motor operates continuously in high speed, GO to
Pinpoint Test R.
If the blower motor is inoperative only in some speeds, GO to
Pinpoint Test U.
G5 VERIFY THE DEFROST OVERRIDE OPERATION
Press the override button for DEFROST operation.
Is outside air being discharged from the windshield defroster nozzle and the side window
demisters?
Yes
GO to G6.
No
GO to Pinpoint Test I.
G6 VERIFY THE FLOOR OVERRIDE OPERATION
Press the override button for FLOOR operation.
Is outside air being discharged from the floor duct?
Yes
GO to G7.
No
GO to Pinpoint Test I.
G7 VERIFY THE VENT OVERRIDE OPERATION
Press the override button for VENT operation.
Is outside air being discharged from the instrument panel registers?
Yes
GO to G8.
No
GO to Pinpoint Test I.
G8 VERIFY THE A/C CLUTCH DOES NOT ENGAGE IN THE VENT MODE
Press the override button for VENT operation.
Does the A/C clutch engage when the VENT override button is pressed?
Yes
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED)
manual.
No
GO to G9.
G9 VERIFY THE MAX A/C OVERRIDE OPERATION
Make sure the ambient air temperature is above 5°C (41°F).
Press the override button for MAX A/C operation.
Is recirculated air being discharged from the instrument panel registers?
Yes
GO to G10.
No
GO to Pinpoint Test I.
G10 VERIFY A/C CLUTCH ENGAGEMENT IN THE MAX A/C MODE
Press the override button for MAX A/C operation.
Does the A/C clutch engage when the MAX A/C override button is pressed?
Yes
The test is complete. The system is functioning normally.
2003 Taurus/Sable Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/
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