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Home >> Lexus >> 2003 >> IS 300 Base, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Body Control System >> Circuit Tests >> Ignition Switch Power Source Circuit >> Circuit Description

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
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