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.
Scan Tool Information Modes
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Scan Tool Information Modes
On the scan tool, four modes are available in the body control module selection.
Select the following items:
1. Body control module
2. Data display
3. Data list
The following list appears on the scan tool:
^ Data
^ Input 1
^ Input 2
^ Outputs
^ Security data
The scan tool allows for the for the display of Class 2 values, or the state of components commanded by the various systems (i.e. ATC, BCM, HVAC, PC, PCM and VCM). The tests available are dependent upon the system selected, but may include the following modes:
^ Data (analog inputs): This test displays analog values as seen by the system.
^ Inputs (digital inputs): This test displays digital values as seen by the system and provides an indication of whether the input has cycled.
^ Outputs (digital outputs): This test allows for digital outputs controlled by the BCM system in order to be turned OFF/ON.
^ Special functions (analog outputs): This test allows for analog outputs of the BCM system to be set at a desired value.
^ Clear diagnostic trouble codes: This test will erase all DTC's stored for the system currently selected (Note: If the malfunction is still present, the DTC may immediately reset).
^ Security data (content theft): This test contains information system applicable to the content theft system.
Select the following items:
1. Body control module
2. Data display
3. Data list
The following list appears on the scan tool:
^ Data
^ Input 1
^ Input 2
^ Outputs
^ Security data
The scan tool allows for the for the display of Class 2 values, or the state of components commanded by the various systems (i.e. ATC, BCM, HVAC, PC, PCM and VCM). The tests available are dependent upon the system selected, but may include the following modes:
^ Data (analog inputs): This test displays analog values as seen by the system.
^ Inputs (digital inputs): This test displays digital values as seen by the system and provides an indication of whether the input has cycled.
^ Outputs (digital outputs): This test allows for digital outputs controlled by the BCM system in order to be turned OFF/ON.
^ Special functions (analog outputs): This test allows for analog outputs of the BCM system to be set at a desired value.
^ Clear diagnostic trouble codes: This test will erase all DTC's stored for the system currently selected (Note: If the malfunction is still present, the DTC may immediately reset).
^ Security data (content theft): This test contains information system applicable to the content theft system.
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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.