Clearing Trouble Codes

How to erase self-diagnostic results
The self-diagnostic results stored in the T.C.M. can be erased by any of the following three methods.
(1) Depress the accelerator fully (1st throttle) and set the neutral switch to OFF (automatic transmission is in other than "P" and "N" positions). In this state, turn ON the ignition key (engine need not be started). After this, set the neutral switch to ON, and release the accelerator. This will erase the diagnostic results of all items.
(2) If diagnostic judgment on a particular item remains OK and no NG judgment is made while the ignition key is turned ON 50 times, the diagnostic results on that item are erased.
(3) If the backup power supply is disconnected for more than one minute, the diagnostic results on all items are erased. In addition, the values learned by the system are also erased.