With Manufacturer's Scan Tool

USING TOYOTA HAND-HELD TESTER
a. Hook up the TOYOTA hand-held tester to the DLC1.
b. Monitor the ECU data by following the prompts on the tester screen.

HINT:
TOYOTA hand-held tester has a "Snapshot" function which records the monitored data.
Please refer to the TOYOTA hand-held tester operator's manual for further details.