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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 37 (ENGINE CONTROLS SELF-DIAGNOSTICS - 2.2L CNG)SYSTEM TESTSMIL ON STEADYTEST DESCRIPTION
2001 Chevrolet Cavalier LS, 2.4 T
Test Description
2001 Chevrolet Cavalier LS, 2.4 TSECTION Test Description
WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic test procedures.
- 1
The System Check MUST be performed before proceeding with this diagnostic test. Failure to perform the System Check will result in misdiagnosis. - 2
With ignition on, with engine off, the Powertrain Control Module (PCM) should continuously illuminate the MIL. - 3
The scan tool will command BOTH the PCM and the AF ECM to turn the MIL OFF. - 5
This step tests if the MIL Input circuit is requesting MIL illumination. There should not be a MIL Input while the MIL is commanded OFF.
RENDER: 1.0x
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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.