Air Conditioning/ Compressor Clutch Relay

Operation

When the air conditioning signals are input, the engine control module activates the idle-speed control motor, and also switches ON the power transistor. As a result, current flows to the power relay coil and the relay switch is switched ON, the air conditioning compressors magnetic clutch is activated.

The air conditioning switch applies battery voltage to the engine control module when the air conditioning is switch is switched ON.

Troubleshooting Hints

If the air conditioning compressor's magnetic clutch is not activated when the air conditioning switch is switched ON during idling, it is probable that the cause is a malfunction of the air conditioning control system.




Inspection




Harness Inspection



Component Inspection

Power Relay Inspection

NOTE: For information concerning the installation of each relay, refer to Locations .









Check for continuity between the terminals when the battery power-supply is applied to terminal (2), and terminal (4) is grounded.


For further testing refer to Testing and Inspection