Dtc B1205 Afs Ecu Communication Stop
Remove the H-LP LVL fuse from the main body ECU LH (cowl side J/B LH).
Dtc B1262 A/C Ecu Communication Stop
Remove the A/C fuse from the main body ECU LH (cowl side J/B LH).
Dtc B1200 Mpx Body Ecu Stop
Remove the FR DOOR RH fuse from the main body ECU RH (cowl side J/B RH).
Multiplex Communication System - Diagnostic Trouble Code Chart
If malfunction code is displayed during DTC check, check the circuit corresponding to the code in the table below. Proceed to the page given for the circuit.
Multiplex Communication System - Dtc Check / Clear
Connect the intelligent tester to the DLC3.
Multiplex Communication System - Diagnosis System
The gateway ECU controls the functions of the multiplex communication system on the vehicle. Data of the multiplex communication system and the Diagnostic Trouble Codes (DTC) can be read through the Data Link Connector 3 (DLC3) of the vehicle.
Multiplex Communication System - Terminals Of Ecu
Disconnect the gateway ECU connector.
Multiplex Communication System - How To Proceed With Troubleshooting
Check for DTCs and note any codes that are output.
Multiplex Communication System - System Description
The LEXUS IS250 Multiplex Communication System (MPX) uses serial communication, which converts multiple pieces of information into serial communication data. As a result, they can be transmitted through a single communication wire.
Multiplex Communication System - System Diagram
Lexus IS250 IS220d GSE20 ALE20 MULTIPLEX COMMUNICATION