Air Conditioning Compressor Clutch Relay

You can also use a jumper wire to jump the two terminals that pass electrical current onto the air conditioning compressor. The AC compressor relay is responsible for supplying power to the AC compressor and clutch.

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Since the relay is constructed with a relay block that is in the junction block as a unit it is impossible to disconnect the wire harness connecting with the relay block.

Air conditioning compressor clutch relay. As low current passes through the coil a magnetic field is created that draws the relays arm towards the high current circuit. The relay uses numbers 85 and 86 as the electromagnet control. The AC clutch relay electronically controls when the AC clutch engages.

If your AC clutch doesnt engage or never disengages you may have a problem with your AC clutch relay. Relays are used in many circuits throughout your vehicle. The AC compressor relay is no different then other electrical relays - its electrical contacts will eventually wear or burn out and the relay must be replaced.

Automotive switches and electronics are wired to relays since they arent designed to handle the arcing and high current demand required in some circuits. A few basic reasons why an air conditioning clutch does not engage even if you have a power supply down to the compressor. You cant test the compressor with a multimeter.

If the relay has a malfunction replace it with the junction block assembly wire harness together. Power is supplied to this clutch through a relay. The refrigerant is then pumped around the system.

One such circuit is that of the AC compressor. It is a helpful addition to units that have an air conditioning compressor with high hours that might be drawing more current than the Power Module can comfortably supply. The BSI sends feed-back via wire 8057 to the green lamp in the AC push-button.

There is no by-pass as it is mechanical not electrical in that the engine drives the clutch but the electrical component is that the compressor not the clutch is engaged when you turn the AC on. You can test the clutch relay for power with a test light. An AC clutch controls when the air conditioning compressor turns on or off.

You need a CRO to measure the signal as the signal is PWM. The AC compressor clutch is the power feed to your AC compressor. The ac compressor is switched on off continuously causing the magnetic clutch to become too hot and fail.

The compressor has a belt driven clutch which is cycled on and off to keep your AC blowing cool. TX valve is not working. What is a clutch relay.

A standard has been developed for the plug of a mechanical relay. The compressor is the unit that cools the air before it enters into the Hondas cabin. The air conditioning clutch relay transfers power like a switch from the interior AC controls of an automobile to the AC compressor engaging the compressor clutch.

Decandessant bag is blocked. In isolated situations where the AC compressor clutch relay has a unique part number we test it the old-fashioned way. The primary function of the driver is to supply the ground for the component being controlled.

When this is energised it pulls in the front plate of the compressor with a distinctive click. A relay is a simple device composed of a coil and set of contacts. Replace pushbutton control module or B.

Engage AC Compressor Clutch with a Paperclip on Relay How to Fix Bypass Wont Engage Jump Relay - YouTube. DTC P0647 OBD-II is associated with the air conditioning clutch A C relay control circuit. How a relay works.

Without this relay the AC compressor will not have power and the AC system will not function. StrScp3 V2 US YT 12 3. Locate the air conditioner clutch relay by tracing the wire connection from the air conditioner compressor plug-in to the relay.

Using a 12-volt test light connect the alligator clip to the negative terminal on the battery. If your AC is not properly cooling the vehicle the AC clutch relay could be faulty. Remove the component from the socket and test for a power signal and a good ground at the proper terminals.

From the instrument group the signal is sent via the VAN comfort bus 9004D 9005D to the BSI. Jul 13 2015. A relay in the Air Conditioning Compressor Clutch circuit.

You should hear an audible click from the compressor when the clutch activates. Battery positive voltage is supplied to the AC compressor clutch relay. At the front of the compressor within the pulley is a magnetic coil.

The BSI should now send a signal to the ECU via the CAN bus 9000A 9001A and ask for permission to engage the AC compressor clutch. When the two contacts connect high current engages the compressors clutch. Common Reasons for the compressor not starting excluding refrigerant as you have charged the system 1.

P0647 will set when the powertrain control module PCM or one of the other supporting control modules detects abnormal signals in the A C clutch relay control circuit. Checking an AC clutch relay is a process of eliminating possible connection failures. A relay is a device that allows you to control high amperage circuit from low amperage circuit.

The magnetic clutch relay is built in the engine room junction block. The Powertrain Control Module PCM controls the relay by grounding the control circuit through an internal solid-state device called a driver.

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