With Manufacturer's Scan Tool
DIAGNOSIS FUNCTIONMETHOD OF READING THE DIAGNOSTIC TROUBLE CODES
When Using The Scan Tool
CAUTION: Connection and disconnection of the scan tool should always be made with the ignition switch in the OFF position.
1. Connect the scan tool to the data link connector 1.
2. Take a reading of the diagnostic output.
3. Repair the problem location, referring to the diagnostic chart.
4. After turning the ignition switch once to OFF, turn it back to ON.