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 MANUALSCHEVROLET2002CAVALIER BASE, 4D SEDAN, 2.2 4, LN2, STANDARDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESBODY CONTROL MODULESSELF-DIAGNOSTIC SYSTEMAIR CONDITIONING SYSTEM DIAGNOSTIC SYSTEM CHECK
2002 Chevrolet Cavalier Base, 4D Sedan, 2.2 4, LN2, Standard
Air Conditioning System Diagnostic System Check
2002 Chevrolet Cavalier Base, 4D Sedan, 2.2 4, LN2, StandardSECTION Air Conditioning System Diagnostic System Check
- Connect scan tool to Data Link Connector (DLC). DLC is located on left side of instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST A: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS.
- Turn ignition switch to RUN position. Attempt to establish communication with Powertrain Control Module (PCM). If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- Select DISPLAY DTCs function on scan tool for PCM. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, diagnose and repair A/C system by symptom:
- On 2001 models, see MANUAL A/C-HEATER SYSTEMS - CAVALIER & SUNFIRE article in HVAC.
- On 2002 models, see MANUAL A/C-HEATER SYSTEMS - CAVALIER & SUNFIRE article in HVAC.
- If communication DTCs (DTCs beginning with a "U") are not retrieved, go to next step. If any DTCs beginning with "U" are retrieved, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- If any powertrain DTCs (DTCs beginning with "P") related to A/C system are retrieved, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs beginning with "P" related to A/C system are retrieved, diagnose and repair powertrain concern. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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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.