Foreword [Multiplex Communication System]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- 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 DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .
- 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 MALFUNCTIONING PART (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM] , DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM] if the communication error and signal error DTCs are output simultaneously.