Without Scan Tool

NOTE: When the ignition switch is turned off during diagnosis, in each mode, and then turned back on again after the power to the E.C.U. has dropped off completely, the diagnosis will automatically return to Mode I.
The stored memory would be lost if:
1. Battery terminal is disconnected.
2. After selecting Mode III, Mode IV is selected.
However, if the diagnostic mode selector is kept turned fully clockwise, it will continue to change in the order of Mode I > II > III > IV > V > I...ect., and in this state the stored memory will not be erased.