ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION [DYNAMIC STABILITY CONTROL (DSC)]

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•  The external tester communication function enables communication of diagnostic data (DTC read-outs, input/output signal read-outs, operation of input/output parts) between the DSC HU/CM and an external tester.

Connections/Communication Contents

External tester

Mazda Modular Diagnostic System (M-MDS)

Connection

Communication method
On-board diagnostic (malfunction detection) function
Input/output: CAN_H (HS), CAN_L (HS) terminals
Serial communication
PID/data monitor function
Input/output: CAN_H (HS), CAN_L (HS) terminals
Serial communication
active command modes function
Input/output: CAN_H (HS), CAN_L (HS) terminals
Serial communication


Serial communication

•  Serial communication (two-way communication) allows for multiple data to be sent and received instantly along the same line.
•  By connecting the Mazda Modular Diagnostic System (M-MDS) to the DLC-2, diagnostic data can be sent and received between the Mazda Modular Diagnostic System (M-MDS) and the DSC HU/CM using the CAN_H and CAN_L terminals (within the DLC-2).
•  The DSC HU/CM receives the command signals of the malfunction detection function, PID/data monitor function, and the active command modes function based on the Mazda Modular Diagnostic System (M-MDS), and sends DTCs and data regarding the operating condition and status of each input/output part to the Mazda Modular Diagnostic System (M-MDS).

Diagnostic function name

Signal received

Signal sent
Malfunction detection function
DTC verification signal
DTC
PID/data monitor function
Command signal to read selected monitor item
Monitored data for requested monitor item
active command modes function
Operation command signal for selected active command modes item
Output part drive signal

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