Initial Inspection and Diagnostic Overview

FOREWORD [MULTIPLEX COMMUNICATION SYSTEM]

- If the CAN system is considered to be the cause of the malfunction based on the repair order form and the malfunctioning symptom, follow the Troubleshooting Procedure.
- DTCs are also output due to a control module or sensor malfunction, or incorrect power supply. Verify the output DTCs and first inspect the DTCs not shown in Multiplex Communication System - DTC Table.
- If there is an open circuit in the communication lines, it is possible that signal error DTCs may be output in addition to communication error DTCs. Perform Component Tests and General Diagnostics if the communication error and signal error DTCs are output simultaneously.

Troubleshooting Procedure





*1
Multiplex Communication System - DTC Table
*2
Multiplex Communication System
*3
Component Tests and General Diagnostics
*4
M-MDS And Vehicle Not Communicating - Multiplex Communication System