TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
Radiator Cooling Fan Control Module: Testing and Inspection
Vehicles With High Pressure Sensor - G65 -
Coolant Fan Control (FC) Module -J293- (Vehicles With High Pressure Sensor -G65-), Electrical Testing
Terminal assignments at -J293- (vehicles with -G65-)
Location: In engine compartment on left long member
Function:
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Activates coolant fan (s) -V7 (speeds 1 and 2)
-
Activates A/C clutch -N25
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Processes the square-wave signal from high pressure sensor -G65- and sends a positive signal to -E87- to indicate the refrigerant system pressure is
OK.
-
Switches on after-run coolant pump -V51 (if equipped) for continued coolant circulation when the ignition is switched on. The pump continues to
operate for a short time after the ignition has been switched off.
NOTE:
-
The following -J293- connector A terminals are vacant:
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Terminal 1 (on vehicles without after-run coolant pump -V51-)
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Terminals 3, 5, 11 and 14
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-J293- connector A,, terminal 13 is intended for disengaging -A/C clutch -N25- when the instrument cluster sends "excessive coolant temperature"
signal. As disengagement of - N25- also takes place via the A/C control head - E87-, -J293- terminal 13 may be vacant on some vehicles,
dependant of vehicle wiring configuration.
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The function of Coolant Fan Control (FC) Module -J293 and vehicle wiring layout will vary depending on whether vehicle is equipped with A/C
pressure switch -F129 or high pressure sensor -G65-.
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Various versions of Coolant Fan Control (FC) Module -J293-, used in conjunction with high pressure sensor -G65- may be installed. At the time of
publishing however, All TT equipped with -J293- / -G65- have version where coolant fan(s) -V7- speed 1 is always switched on automatically
whenever the A/C clutch -N25- is energized (regardless of refrigerant system pressure).
Terminal assignments and switching conditions (high pressure sensor -G65-)
Terminal -1- Ground (GND)
Terminal -2- Signal output (square-wave signal to -J293- and ECM)
Terminal -3- Positive (terminal 15)
NOTE:
-
When electrical connector at -B- is disconnected, the A/C clutch -N25- cannot be activated.
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High pressure sensor -A- transmits a square-wave signal at a pulse rate that varies according to the refrigerant system pressure. See: Heating and
Air Conditioning/Refrigerant Pressure Sensor / Switch/High Pressure Sensor / Switch/Testing and Inspection/High Pressure Sensor -G65- Signal,
Checking
Switching conditions - Coolant Fan Control (FC) Thermoswitch -F18/- F54
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-F54- between terminals 1 and 2: Closes at approx. 95 °C (-V7- switched to speed 1).