Diesel Data: Automotive Repair

Compressor Magnetic Clutch Circuit

Compressor Circuit

CIRCUIT DESCRIPTION
The air conditioning control assembly outputs the magnetic clutch ON signal from terminal AC1 to the ECM.

When the ECM & TCM receives this signal, it sends a signal from terminal ACT and switches the A/C magnetic clutch relay on, thus turning on the A/C magnetic clutch.

DIAGNOSTIC CHART:




WIRING DIAGRAM:





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INSPECTION PROCEDURE