How To Use General Scan Tool

2014 Subaru Legacy 2.5i, Automatic CVT TransSECTION How To Use General Scan Tool
WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
  1. Prepare a scan tool (general scan tool) required by SAE J1978.
  2. Connect the general scan tool to data link connector located in the lower portion of the instrument panel (on the driver's side).
    Fig 1: Locating Data Link Connector
    G08315883Courtesy of SUBARU OF AMERICA, INC.
  3. Using the general scan tool, call up each data. General scan tool functions consist of:
    1. MODE $01: Current powertrain diagnostic data
    2. MODE $02: Powertrain freeze frame data
    3. MODE $03: Emission-related powertrain DTC
    4. MODE $04: Clear/Reset emission-related diagnostic information
    5. MODE $06: Request on-board monitoring test results for intermittently monitored systems
    6. MODE $07: Request on-board monitoring test results for continuously monitored systems
    7. MODE $08: Request control for on-board system, test, and component
    8. MODE $09: Request vehicle information
  4. Read out the data according to repair procedures. (For detailed operation procedure, refer to the general scan tool operation manual.)
    NOTE: For details concerning DTC, refer to "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC)Β . >
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.