Initial Inspection and Diagnostic Overview

FOREWORD [MULTIPLEX COMMUNICATION SYSTEM]

- When the CAN system is thought to be malfunctioning based on the repair order form and the malfunctioning symptom, perform the CAN system on-board diagnosis.
- 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 Determining Open Circuit Location (HS-CAN) - Multiplex Communication System, Determining Open Circuit Location (MS-CAN) - Multiplex Communication System if the communication error and signal error DTCs are output simultaneously.

Troubleshooting Procedure





*1
Multiplex Communication System - DTC Table
*2
Multiplex Communication System
*3
Error Code:12
*4
Determining Open Circuit Location (HS-CAN) - Multiplex Communication System / Determining Open Circuit Location (MS-CAN) - Multiplex Communication System
*5
M-MDS And Vehicle Not Communicating