Precaution [11/2021 - ]

WARNING: This page is about a different car, the 2024 Lexus LS 500h, 2023 Lexus LS 500h, and 2022 Lexus LS 500h. However, it is still accessible from the selected car via links, so may be relevant.

ETHERNET COMMUNICATION SYSTEM TROUBLESHOOTING

If a DTC from the Ethernet communication system is output, always perform troubleshooting from "How to Proceed with Troubleshooting".
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]
Check that there is no damage such as tears on the Ethernet communication line cover before performing an inspection. If there is damage such as tears on the Ethernet communication line cover, normal communication may become impossible due to noise.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Inner Housing

Precautions when disconnecting/connecting the switching hub inner housings

When disconnecting switching hub terminals to perform an inspection, indicate the connecting positions by using tape or label.
NOTE:
Make sure to connect the disconnected inner housings to the correct connecting positions. If they are not returned to the normal condition after performing an inspection, vehicle functions will not operate normally.

HINT:

Refer to the terminals of ECU for the connectors of each switching hub inner housing.

Refer to TERMINALS OF ECU [11/2021 - ]

Push up the lock inside the connector and pull out the inner housing toward the connector rear.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Lock
	Pull Out Direction

Precautions when repairing the Ethernet communication line

Do not repair by soldering.

NOTE:

Make sure to replace the line as it may be affected by noise.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Wrap with Tape after Soldering
*b	Cover

Use a dedicated harness for Ethernet communication line to bypass the wiring for the repaired location.

NOTE:

Make sure to bypass the wiring between connectors.
Do not use a general-purpose repair wire to bypass the wiring. Always use a dedicated harness for Ethernet communication line.

When repairing a bypass, make sure to use a dedicated harness for Ethernet communication line so that there are 2 or less extension connectors between the ECUs.

*a	Make sure to bypass the wiring between connectors	*b	Use 2 or less extension connectors between the ECUs
*c	Do not bypass the wiring directly on the harness	*d	Bypass Wiring
*e	Open Circuit Point	-	-

Secure the bypass wiring to the vehicle harness using vinyl tape along the existing vehicle harness route.

*a	Existing Connector	*b	Ethernet Replacement Wire
*c	Vinyl Tape	-	-

To prevent the application of excessive force to the connector, bend within the allowable range at a distance at least 30 mm (1.18 in.) from the connector.

*a	15 mm (0.591 in.) or more
*b	30 mm (1.18 in.)

Bind any excess Ethernet replacement wire to ensure the electricity flows in a single direction.