Component Location

Fig 1: Locating Computerized Engine Control Components (ES300)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Locating Computerized Engine Control Components (GS300)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Locating Computerized Engine Control Components (GS400)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Locating Computerized Engine Control Components (LS400)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Locating Computerized Engine Control Components (SC300)

Fig 6: Locating Computerized Engine Control Components (SC400)

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.

CAUTION: If ECM replacement is instructed, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair as necessary and repeat testing to confirm ECM malfunction.