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.
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HOMESERVICE MANUALSTOYOTA2002HIGHLANDER 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCOMPRESSOR CIRCUIT
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Compressor Circuit
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Compressor Circuit
CIRCUIT DESCRIPTION
The A/C amplifier assy outputs the magnetic clutch ON signal from terminal MPX to the ECM receives this signal, it sends a signal from terminal ACMG and switches the magnetic clutch relay ON, thus turning on the magnetic clutch.
INSPECTION PROCEDURE
The A/C amplifier assy outputs the magnetic clutch ON signal from terminal MPX to the ECM receives this signal, it sends a signal from terminal ACMG and switches the magnetic clutch relay ON, thus turning on the magnetic clutch.
Wiring Diagram:
Step 1 - 3:
Step 4:
INSPECTION PROCEDURE
RENDER: 1.0x
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.