How To Use OBD-II General Scan Tool

Prepare a general scan tool (OBD-II general scan tool) required by SAE J1978.

Open the cover and connect the OBD-II general scan tool to data link connector located in the lower portion of instrument panel (on the driver's side).

Fig 1: Identifying Location For Connecting OBD-II General Scan Tool To Data Link Connector

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Using the OBD-II general scan tool, call up DTC and freeze frame data.

OBD-II general scan tool functions consist of:

MODE $01: Current powertrain diagnostic data

MODE $02: Powertrain freeze frame data

MODE $03: Emission-related powertrain DTC

MODE $04: Clear/Reset emission-related diagnostic information

MODE $06: Request on-board monitoring test results for non-continuously monitored systems

MODE $07: Request on-board monitoring test results for continuously monitored systems

MODE $09: Request vehicle information

Read out the data according to repair procedures. (For detailed operation procedures, refer to the OBD-II General Scan Tool  Operation Manual.)