Sequoia SR5 4WD V8-4.7L (2UZ-FE) (2001)
As shown in the illustration, each ECU of this vehicle is connected by communication bus and it transmits each signal by communication. This
communication bus is self-diagnosed by Body ECU and it memorizes DTC when it detects communication stop to ECU or communication bus +B short
or GND short. There is a possibility that Body ECU cannot self-diagnose accurately unless it doesn't work normal. So, please note that the
troubleshooting of Body Electrical System should be done after confirming if Body ECU and Open door indicator works normal by 2 "BASIC
INSPECTION" described later.