System Description [10/2023 - ]

WARNING: This page is about a different car, the 2024 Lexus LS 500h. However, it is still accessible from the selected car via links, so may be relevant.

LOAD OPERATION OUTPUT

Load is turned on or off according to the operation signals and switch signals from each ECU.

Load	No. 1 Semiconductor Power Integration ECU	Semiconductor Power Integration ECU	No. 3 Semiconductor Power Integration ECU
Headlight ECU sub-assembly LH	•	-	-
Headlight ECU sub-assembly RH	•	-	-
Air conditioning water pump	•	-	-
PTC heater	-	•	-
Stop light	-	-	•
Rear taillight	-	-	•
Back-up light	-	-	•
Rear defogger	-	-	•

SEMICONDUCTOR FUSE FUNCTION

When a malfunction current occurs during load operation, the current is shut off before the electrical lines emit smoke, and then load is turned off. After the current is shut off, the off condition is maintained until the operation signals or switch signals turn off.