With Manufacturer Scan Tool

DTC CHECK (Using hand-held tester)

a. Connect the LEXUS hand-held to DLC3.
b. Turn the ignition switch ON and the LEXUS hand-held tester main switch ON.
c. Use the LEXUS hand-held tester to check the DTC, note them down. (For opening instructions, see the LEXUS hand-held tester's instruction book).