This Code Reader and manual are designed for use both by consumers with little or no experience in retrieving codes, or by experienced technicians desiring a more in-depth explanation of OBD II system basics. If you are having problems with your vehicle and only want to know if any Diagnostic Trouble Codes are present in the vehicle’s computer system, go directly to paragraph 4.2 and follow the simple directions to retrieve the codes. The codes retrieved, and their definitions, will give you valuable information and a starting point from which to proceed to the next step.
Once the codes have been retrieved, you can choose to:
• Take your vehicle to an Automotive Service Center for repair: Take your vehicle, a copy of the completed Preliminary Vehicle Diagnosis Worksheet (see page 1-5) and codes retrieved to your technician for evaluation. This will demonstrate to your technician that you are an informed motorist and will also assist him in pinpointing the location of the problem.
• Attempt to fix the problem yourself: If you choose to fix the problem yourself, read and follow all of the manual’s recommendations and procedures.
• The 3100 OBD II Code Reader is designed to work on all OBD II compliant vehicles. All 1996 and newer vehicles (cars and light trucks) sold in the United States are OBD II compliant.
NOTE: Federal law requires that all 1996 and newer cars and light trucks sold in the United States must be OBD II compliant; this includes all Domestic, Asian and European vehicles.