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 MANUALSCHEVROLET2001ASTRO VAN L AWD V6-4.3L VIN WREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINTRANSFER CASETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA LIST
2001 Chevrolet Astro Van L AWD V6-4.3L VIN W
Scan Tool Data List
2001 Chevrolet Astro Van L AWD V6-4.3L VIN WSECTION Scan Tool Data List
Scan Tool Data List
The scan tool used provides the following capabilities:
^ Displays the data list.
^ Displays current and history trouble codes.
^ Clear the diagnostic trouble codes after a repair is completed.
Important: Make sure the scan tool that you are using is functioning properly and has the latest software. Use of a malfunctioning scan tool or one that has old software can result in misdiagnosis and unnecessary parts replacement.
To use the scan tool, connect it to the Data Link Connector (DLC) and turn the ignition switch to the RUN position.
The Transfer Case Scan Tool Data List contains all the Automatic Transfer Case (ATC) related parameters that are available on the scan tool. The scan tool data list is arranged in alphanumeric order.
Use the Transfer Case Scan Tool Data List only after the following is determined:
^ A Diagnostic System Check has been completed.
^ No Diagnostic Trouble Codes (DTCs) are set.
^ Transfer Case Diagnostics indicates the system is functioning properly.
Scan tool values from a properly operating system may be used for comparison with the transfer case system you are diagnosing. The Transfer Case Scan Tool Data List represents values recorded under the following conditions:
^ The engine is at idle.
^ Closed throttle
^ The gear is in PARK or NEUTRAL.
^ The accessories are OFF.
Only the parameters listed below are referenced in this data for use in diagnosis. If all values are within the typical range described below, diagnose the problem using Intermittents and Poor Connections.
The scan tool used provides the following capabilities:
^ Displays the data list.
^ Displays current and history trouble codes.
^ Clear the diagnostic trouble codes after a repair is completed.
Important: Make sure the scan tool that you are using is functioning properly and has the latest software. Use of a malfunctioning scan tool or one that has old software can result in misdiagnosis and unnecessary parts replacement.
To use the scan tool, connect it to the Data Link Connector (DLC) and turn the ignition switch to the RUN position.
The Transfer Case Scan Tool Data List contains all the Automatic Transfer Case (ATC) related parameters that are available on the scan tool. The scan tool data list is arranged in alphanumeric order.
Use the Transfer Case Scan Tool Data List only after the following is determined:
^ A Diagnostic System Check has been completed.
^ No Diagnostic Trouble Codes (DTCs) are set.
^ Transfer Case Diagnostics indicates the system is functioning properly.
Scan tool values from a properly operating system may be used for comparison with the transfer case system you are diagnosing. The Transfer Case Scan Tool Data List represents values recorded under the following conditions:
^ The engine is at idle.
^ Closed throttle
^ The gear is in PARK or NEUTRAL.
^ The accessories are OFF.
Only the parameters listed below are referenced in this data for use in diagnosis. If all values are within the typical range described below, diagnose the problem using Intermittents and Poor Connections.
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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.