Communication Line With Cooling Fan ECU

COMMUNICATION LINE WITH COOLING FAN ECU

CIRCUIT DESCRIPTION

When the magnetic clutch relay is ON and the required outlet air temp. is below a predetermined value, the A/C control assembly turns ON Tr1 inside the ECU. (Terminal voltage at the FAN terminal is almost 0 V).

As a result, the cooling fan ECU increases the speed of the cooling fan as required and increases the cooling performance of the condenser.





DIAGNOSTIC CHART





WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE