System Inspection

Was the ECM just replaced or reflashed?
YES:
- Using a scan tool, perform "VIN WRITING" procedure. Refer to the latest Reference manual for scan tool and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO:
- Using a scan tool, read VIN information.
  If there is no proper VIN information, perform "VIN WRITING" procedure.
  
  If VIN information exists, substitute with a known-good ECM and check for proper operation. If the problem.
  
  And go to "VERIFICATION OF VEHICLE REPAIR " procedure.