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 OPERATIONFREEZE FRAME/FAILURE RECORDS
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Freeze Frame/Failure Records
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Freeze Frame/Failure Records
If the control module turns the MIL ON because a DTC is set. the following information is stored in the scan tool and displayed in the Freeze Frame/Failure Records data list.
^ The DTC that caused the MIL to be turned ON.
^ The engine speed (RPM) at the time the DTC set.
^ The Engine Coolant Temperature (ECT) at the time the DTC set.
^ The Manifold Absolute Pressure (MAP) at the time the DTC set.
^ The Short Term (ST) Fuel Trim for Bank 1 at the time the DTC set.
^ The Long Term (LT) Fuel Trim for Bank 1 at the time the DTC set.
^ The Short Term (ST) Fuel Trim for Bank 2 at the time the DTC set.
^ The Long Term (LT) Fuel Trim for Bank 2 at the time the DTC set.
^ The Loop Status at the time the DTC set.
^ The Engine Load at the time the DTC set.
^ The Mass Air Flow (MAF) at the time the DTC set.
^ The Vehicle Speed at the time the DTC set.
^ The Mileage Since First Failure.
^ The Mileage Since MIL Request.
This information will remain stored in the control module until the following occurs:
^ A misfire DTC is set, and that information is stored.
^ A fuel trim DTC is set, and that information is stored.
^ The DTC information is cleared.
^ The DTC that caused the MIL to be turned ON.
^ The engine speed (RPM) at the time the DTC set.
^ The Engine Coolant Temperature (ECT) at the time the DTC set.
^ The Manifold Absolute Pressure (MAP) at the time the DTC set.
^ The Short Term (ST) Fuel Trim for Bank 1 at the time the DTC set.
^ The Long Term (LT) Fuel Trim for Bank 1 at the time the DTC set.
^ The Short Term (ST) Fuel Trim for Bank 2 at the time the DTC set.
^ The Long Term (LT) Fuel Trim for Bank 2 at the time the DTC set.
^ The Loop Status at the time the DTC set.
^ The Engine Load at the time the DTC set.
^ The Mass Air Flow (MAF) at the time the DTC set.
^ The Vehicle Speed at the time the DTC set.
^ The Mileage Since First Failure.
^ The Mileage Since MIL Request.
This information will remain stored in the control module until the following occurs:
^ A misfire DTC is set, and that information is stored.
^ A fuel trim DTC is set, and that information is stored.
^ The DTC information is cleared.
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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.