How do you reset the check engine light in a 1997 Toyota T100?

To reset the check engine light in a 1997 Toyota T100, you can disconnect the negative battery terminal for about 15 minutes. This will clear the engine control unit's memory and turn off the light. Alternatively, you can use an OBD-II scanner to erase the trouble codes that triggered the light. Always ensure that any underlying issues causing the light to activate are addressed first.