Diagnostic Trouble Code Chart [11/2021 - 10/2022]

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Link
B1021-04	Ethernet SW "A" Performance System Internal Failure	When a non-volatile memory malfunction is detected in the ethernet switching hub ECU assembly	Ethernet switching hub ECU assembly	Ethernet Switch1	Refer to DTC B1021-04: Ethernet Switch1 Performance System Internal Failure [11/2021 - ]
B1022-04	Ethernet Switch2 Performance System Internal Failure	When a non-volatile memory malfunction is detected in the No. 2 ethernet switching hub ECU assembly	No. 2 ethernet switching hub ECU assembly	Ethernet Switch2	Refer to DTC B1022-04: Ethernet Switch2 Performance System Internal Failure [11/2021 - ]
U1010-00	Ethernet SW "A" Port 1 Circuit	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the DCM (telematics transceiver)	Ethernet switching hub ECU assembly DCM (telematics transceiver) Ethernet communication wire	Ethernet Switch1	Refer to DTC U1010-00: Ethernet Switch1 Port1 Link Down [11/2021 - ]
U1011-00	Ethernet Switch1 Port2 Link Down	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the combination meter assembly	Ethernet switching hub ECU assembly Combination meter assembly Ethernet communication wire	Ethernet Switch1	Refer to DTC U1011-00: Ethernet Switch1 Port2 Link Down [11/2021 - ]
U1012-00	Ethernet Switch1 Port3 Link Down	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the lidar advanced drive ECU assembly (lidar ECU LH)	Ethernet switching hub ECU assembly Lidar advanced drive ECU assembly (lidar ECU LH) Lidar advanced drive ECU assembly (lidar ECU LH) power source circuit Ethernet communication wire	Ethernet Switch1	Refer to DTC U1012-00: Ethernet Switch1 Port3 Link Down [11/2021 - 10/2022]
U1013-00	Ethernet Switch1 Port4 Link Down	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the No. 2 ethernet switching hub ECU assembly	Ethernet switching hub ECU assembly No. 2 ethernet switching hub ECU assembly No. 2 ethernet switching hub ECU assembly power source circuit Ethernet communication wire	Ethernet Switch1	Refer to DTC U1013-00: Ethernet Switch1 Port4 Link Down [11/2021 - ]
U1014-00	Ethernet Switch1 Port5 Link Down	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the front lidar advanced drive sensor assembly	Ethernet switching hub ECU assembly Front lidar advanced drive sensor assembly Front lidar advanced drive sensor assembly power source circuit Ethernet communication wire	Ethernet Switch1	Refer to DTC U1014-00: Ethernet Switch1 Port5 Link Down [11/2021 - ]
U1015-00	Ethernet Switch1 Port6 Link Down	When a link-down continues for 60 seconds or more between the ethernet switching hub ECU assembly and the central gateway ECU (network gateway ECU)	Ethernet switching hub ECU assembly Central gateway ECU (network gateway ECU) Ethernet communication wire	Ethernet Switch1	Refer to DTC U1015-00: Ethernet Switch1 Port6 Link Down [11/2021 - ]
U1018-00	Ethernet Switch2 Port1 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the ethernet switching hub ECU assembly	No. 2 ethernet switching hub ECU assembly	Ethernet Switch2	Refer to DTC U1018-00: Ethernet Switch2 Port1 Link Down [11/2021 - ]
U1019-00	Ethernet Switch2 Port2 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the advanced drive assembly	No. 2 ethernet switching hub ECU assembly Advanced drive assembly Ethernet communication wire	Ethernet Switch2	Refer to DTC U1019-00: Ethernet Switch2 Port2 Link Down [11/2021 - ]
U101A-00	Ethernet Switch2 Port3 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the spatial information service ECU assembly	No. 2 ethernet switching hub ECU assembly Spatial information service ECU assembly Ethernet communication wire	Ethernet Switch2	Refer to DTC U101A-00: Ethernet Switch2 Port3 Link Down [11/2021 - ]
U101B-00	Ethernet Switch2 Port4 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the lidar advanced drive ECU assembly (lidar ECU RH)	No. 2 ethernet switching hub ECU assembly Lidar advanced drive ECU assembly (lidar ECU RH) Lidar advanced drive ECU assembly (lidar ECU RH) power source circuit Ethernet communication wire	Ethernet Switch2	Refer to DTC U101B-00: Ethernet Switch2 Port4 Link Down [11/2021 - 10/2022]
U101C-00	Ethernet Switch2 Port5 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the advanced drive extension ECU assembly	No. 2 ethernet switching hub ECU assembly Advanced drive extension ECU assembly Ethernet communication wire	Ethernet Switch2	Refer to DTC U101C-00: Ethernet Switch2 Port5 Link Down [11/2021 - ]
U101D-00	Ethernet Switch2 Port6 Link Down	When a link-down continues for 60 seconds or more between the No. 2 ethernet switching hub ECU assembly and the lidar advanced drive ECU assembly (lidar ECU RR)	No. 2 ethernet switching hub ECU assembly Lidar advanced drive ECU assembly (lidar ECU RR) Lidar advanced drive ECU assembly (lidar ECU RR) power source circuit Ethernet communication wire	Ethernet Switch2	Refer to DTC U101D-00: Ethernet Switch2 Port6 Link Down [11/2021 - 10/2022]