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 MANUALSCHEVROLET1998ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDESCRIPTION AND OPERATIONON-BOARD DIAGNOSTIC TESTTEST ENABLING CONDITIONS
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Test Enabling Conditions
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Test Enabling Conditions
When the test enabling conditions for a particular test are met, the test will continue to run until one of the following occur:
^ The conditions for enabling that test are no longer present.
^ The test is completed and passed. In this instance the Diagnostic Executive will store the following information:
- The test has ran since the last ignition cycle.
- The test has passed during the current ignition cycle.
- A malfunction is not present at this time.
^ The test is completed and failed. In this instance the Diagnostic Executive will store the following information:
- The test has ran since the last ignition cycle.
- The malfunction is present at this time.
- Certain engine data values present at the time of the malfunction.
^ The conditions for enabling that test are no longer present.
^ The test is completed and passed. In this instance the Diagnostic Executive will store the following information:
- The test has ran since the last ignition cycle.
- The test has passed during the current ignition cycle.
- A malfunction is not present at this time.
^ The test is completed and failed. In this instance the Diagnostic Executive will store the following information:
- The test has ran since the last ignition cycle.
- The malfunction is present at this time.
- Certain engine data values present at the time of the malfunction.
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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.