Circuit Description

When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal No. 4 (ACC) of the body ECU and when the ignition switch is turned to the ON position, battery positive voltage is applied to terminal No. 3 (IG) of the body ECU. For circuit diagram, see Fig 1.

Fig 1: Identifying Ignition Switch Power Source Circuit

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002