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 DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONSSECURITY DATA
2001 Chevrolet Astro Van L AWD V6-4.3L VIN W
Security Data
2001 Chevrolet Astro Van L AWD V6-4.3L VIN WSECTION Security Data
Auto Learn Timer: The scan tool displays the seconds used by the BCM to learn valid code from the Passlock(TM) sensor. The learn procedure consists of 3 consecutive periods.
Battery Voltage: The scan tool displays the battery system voltage.
Content Theft Lamp: The scan tool displays the state of the SECURITY lamp. The scan tool displays ON when activated by an unauthorized entry.
Content Theft State: The scan tool displays the state of the content theft feature. The scan tool displays ON when activated by an unauthorized entry.
Door Key Switch: The scan tool displays the state of the door key switch. The scan tool displays ACTIVE when the switch is activated in either door key cylinder.
Ignition 1: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN or CRANK position.
Ignition 3: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN position.
Passlock(TM) Code: The scan tool displays the validity of the Passlock(TM) code received by the BCM. The scan tool displays OPEN, SHORTED, TAMPER and a valid code as a numeric value (1-10).
Passlock(TM) Data Voltage: The scan tool displays the voltage code from the Passlock(TM) sensor to the BCM. The BCM determines if the voltage received is a valid or invalid code voltage.
Passlock(TM) State: The scan tool displays the state of the Passlock(TM) system.
Security Lamp State: The scan tool displays the state of the SECURITY lamp. The scan tool displays ON, OFF or FLASHING.
Tamper Timer: The scan tool displays the time remaining when in the tamper mode. The timer starts when the ignition switch is turned to the RUN position and the BCM receives a Passlock(TM) data voltage different from the last learned voltage. The timer has a delay of 10 minutes and will stay active even if the ignition switch is cycled from the RUN to the OFF position.
PCM Fail Enable: The scan tool displays the state of the PCM fail enable mode. The scan tool displays YES when the Passlock(TM) system transitions from the Monitor Passlock(TM) Data state to the PCM Fail Enable state.
PCM Fuel Continue: The scan tool displays the state of the PCM fuel continue mode. The scan tool displays YES when the Passlock(TM) system verifies a valid password to the BCM.
PCM Learn Timer: The scan tool displays the state of the PCM learn timer. The scan tool displays INACTIVE when the BCM is not in a learn mode.
VTD Fuel Disable: The scan tool displays the state of the VTD fuel disable mode. The scan tool displays INACTIVE when the Passlock(TM) system verifies a valid password.
VTD Fuel Disable Until Ignition Off: The scan tool displays the state of the VTD fuel disable until Ignition off mode. The scan tool displays NO when the Passlock(TM) system verifies a valid password.
VTD Password Learn Mode: The scan tool displays the state of the VTD password learn mode. The scan tool displays INACTIVE when the Passlock(TM) system is not in a learn mode.
Battery Voltage: The scan tool displays the battery system voltage.
Content Theft Lamp: The scan tool displays the state of the SECURITY lamp. The scan tool displays ON when activated by an unauthorized entry.
Content Theft State: The scan tool displays the state of the content theft feature. The scan tool displays ON when activated by an unauthorized entry.
Door Key Switch: The scan tool displays the state of the door key switch. The scan tool displays ACTIVE when the switch is activated in either door key cylinder.
Ignition 1: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN or CRANK position.
Ignition 3: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN position.
Passlock(TM) Code: The scan tool displays the validity of the Passlock(TM) code received by the BCM. The scan tool displays OPEN, SHORTED, TAMPER and a valid code as a numeric value (1-10).
Passlock(TM) Data Voltage: The scan tool displays the voltage code from the Passlock(TM) sensor to the BCM. The BCM determines if the voltage received is a valid or invalid code voltage.
Passlock(TM) State: The scan tool displays the state of the Passlock(TM) system.
Security Lamp State: The scan tool displays the state of the SECURITY lamp. The scan tool displays ON, OFF or FLASHING.
Tamper Timer: The scan tool displays the time remaining when in the tamper mode. The timer starts when the ignition switch is turned to the RUN position and the BCM receives a Passlock(TM) data voltage different from the last learned voltage. The timer has a delay of 10 minutes and will stay active even if the ignition switch is cycled from the RUN to the OFF position.
PCM Fail Enable: The scan tool displays the state of the PCM fail enable mode. The scan tool displays YES when the Passlock(TM) system transitions from the Monitor Passlock(TM) Data state to the PCM Fail Enable state.
PCM Fuel Continue: The scan tool displays the state of the PCM fuel continue mode. The scan tool displays YES when the Passlock(TM) system verifies a valid password to the BCM.
PCM Learn Timer: The scan tool displays the state of the PCM learn timer. The scan tool displays INACTIVE when the BCM is not in a learn mode.
VTD Fuel Disable: The scan tool displays the state of the VTD fuel disable mode. The scan tool displays INACTIVE when the Passlock(TM) system verifies a valid password.
VTD Fuel Disable Until Ignition Off: The scan tool displays the state of the VTD fuel disable until Ignition off mode. The scan tool displays NO when the Passlock(TM) system verifies a valid password.
VTD Password Learn Mode: The scan tool displays the state of the VTD password learn mode. The scan tool displays INACTIVE when the Passlock(TM) system is not in a learn mode.
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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.