With Manufacturer's Scan Tool
Check the DTCHINT: If a malfunction occurs in the vehicle speed sensors or stop lamp switch assy, etc. during cruise control driving, the ECU actuates AUTO CANCEL of the cruise control and turns on and off the CRUISE MAIN indicator light to inform the driver of a malfunction. At the same time, the malfunction is stored in memory as a diagnostic trouble code.
USING HAND-HELD TESTER
a. Hook up the hand-held tester to the DLC3.
b. Monitor the ECU data by following the prompts on the tester screen.
HINT: Hand-held tester has a "Snapshot" function which records the monitored data.
Please refer to the hand-held tester operator's manual for further details.