With Manufacturer's Scan Tool

Check the DTC.
1. Hook up the LEXUS hand-held tester to the DLC2.
2. Monitor the ECU data by following the prompts on the tester screen.
Please refer to the LEXUS hand-held tester operator's manual.
LEXUS hand-held tester has a "Snapshot" function. This records the measured values and is effective in the diagnosis of intermittent problems.