Monitor SCANTOOL Data

Check DTC Status
1. Connect scantool to Data Link Connector (DLC).
2. IG "ON".
3. Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F4 (DTAL) to check DTC's information from the DTCs menu
4. Read "DTC Status" parameter.
  
  Fig 1: Scan Tool Display - DTC Title
5. Is parameter displayed "Present fault"?
  YES
  - Substitute with a known - good Catalyst Converter and check for proper operation. If the problem is corrected, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Go to "COMPONENT INSPECTION" procedure below.