For Using Hand-Held Tester Or OBD II Scan Tool
- Before using the tester, read its user manual thoroughly.
- Connect the cable of the tester to DLC3, turn the ignition switch ON and operate the tester. If the tester cannot communicate with the ECU controlled system, there is a problem on the vehicle side or tester side.
- If communication is normal when the tester is connected to another vehicle, inspect the diagnosis data link line (Bus (+) line) or ECU power circuit of the vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem lies in the tester. Perform the Self Test procedures outlined in the Tester Operator's Manual.