Without Scan Tool
Clearing the DTCsDisconnect the battery terminal or remove the EFI and ETCS fuse from engine room R/B for 60 seconds or more.
NOTE: If the hand-held tester switches the ECM from the normal mode to the check mode or vice-versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTCs and freeze frame data will be erased.