GM Service Manual Online
For 1990-2009 cars only

Plug the scan tool into the Data Link Connector (DLC). The scan tool becomes part of the vehicle's electronic system. The scan tool performs the following functions:

    • Display Magnasteer® data
    • Display Magnasteer® diagnostic trouble codes
    • Clear Magnasteer® diagnostic trouble codes
    • Control Magnasteer® components
    • Perform extensive Magnasteer® diagnosis
    • Provide diagnostic testing for intermittent Magnasteer® conditions
        Each test mode has specific diagnostic capabilities which depend upon various keystrokes.
        The keys on the scan tool perform the following functions:
       - Select operating modes
       - Perform functions within an operating mode
       - Enter DTC designations
       - Enter model year designations

Refer to Enhanced Diagnostics for more scan tool diagnostic information.