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Ecu Power Source Circuit

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

For ECU power source circuit testing procedure, see Fig 1 and Fig 2 . For terminal voltages, see Fig 3 and Fig 4 . For resistance values, see Figure.

Fig 1: Testing ECU Power Source Circuit (1 Of 2)
G00368783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing ECU Power Source Circuit (2 Of 2)
G00368784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Identifying ECU Terminal Voltages (1 Of 2)
G00368785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Identifying ECU Terminal Voltages (2 Of 2)
G00368786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002