Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
A/C Compressor Clutch Controls (Except 1.9L & 3.0L)
To provide improved idle quality, maintain Wide Open Throttle (WOT) performance and provide A/C system protection, compressor clutch is controlled by PCM.
For proper control of cooling fans, compressor clutch and Idle Air Control (IAC) valve, a refrigerant pressure sensor is used. PCM uses signals provided by sensor to monitor high and low side refrigerant pressures. If PCM detects a fault in refrigerant pressure circuit, compressor clutch will be disabled.
The A/C compressor clutch relay is controlled by PCM. This allows PCM to raise idle speed before engaging compressor clutch, or disable compressor clutch during WOT, high engine RPM, high power steering loads and hot engine restarts. PCM also disables compressor clutch if coolant temperature becomes excessive. For location of A/C compressor clutch relay, see A/C COMPRESSOR CLUTCH RELAY LOCATION table.
| Application | Location |
|---|---|
| "C" Body | Right Front Of Engine Compartment, In Fuse/Relay Block |
| "E" & "K" Bodies | In Underhood Fuse/Relay Block |
| "F" Body | In Underhood Electrical Center, On Left Inner Fender Panel |
| "G" Body | In Underhood Relay Center, At Right Front Of Engine Compartment |
| "H" Body | Center Rear Of Engine Compartment, Below Right-Side Maxifuse Block |
| "J" Body | In Underhood Fuse/Relay Block, At Left Front Of Engine Compartment |
| "N" Body | In Underhood Junction Block, In Left Side Of Engine Compartment |
| "W" Body | In Underhood Electrical Center, At Right Front Of Engine Compartment |
| "Y" Body | In Underhood Electrical Center, In Front Of Battery |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.