System Inspection

Was the ECM just replaced or reflashed?
YES
- Using a scan tool, perform "VIN WRITING" procedure. 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 is corrected, replace ECM.
- And go to "VERIFICATION OF VEHICLE REPAIR " procedure.