Vehicles With A/C Pressure Switch - F129 -

Coolant Fan Control (FC) Module -J293- (Vehicles With A/C Pressure Switch -F129-), Electrical Testing

Terminal assignments at -J293- (vehicles with -F129-)







Location: In engine compartment on left long member.

Function:
- Activates coolant fan(s) -V7- (speeds 1 and 2)
- Activates A/C clutch -N25-.


NOTE: The function of -J293 and vehicle wiring layout will vary depending on whether vehicle is equipped with A/C pressure switch -F129 or high pressure sensor -G65-.


Terminal assignments and switching conditions (A/C pressure switch -F129-)







- Switch between terminals -1- and -2- opens if there is excess pressure or insufficient refrigerant system pressure (A/C clutch -N25- is disengaged).
- Switch between terminals -3- and -4- closes when refrigerant system pressure rises (coolant fan(s) -V7- switched to speed 2).

Switching conditions - Coolant Fan Control (FC) Thermoswitch -F18/- F54
- -F54 between terminals 1 and 2: Closes at approx. 95 °C (-V7- switched to speed 1).
- -F18 between terminals 3 and 2: Closes at approx. 102 °C (-V7- switched to speed 2).

Switching conditions - Engine Coolant Temperature (ECT) Waring Switch -F14-
- Switch opens at approx. 118 °C - compressor is switched off.


NOTE: -F14- is only installed on vehicles with A/C pressure switch -F129-.


Test step 1 - Voltage supply, Ground (GND) supply

Test Step 1.1 - 1.4:

Test step 2 - Activation of coolant fan(s) -V7-

Test Step 2.1 - 2.2:

Test Step 2.3 - 2.4:

Test Step 2.5 - 2.6:

Test step 3 - Activation of A/C clutch -N25-

Test Step 3.1:

Test Step 3.2: