ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (TIRE PRESSURE MONITORING SYSTEM)

id020200100600


External Tester Communication Function

•  The external tester communication function communicates diagnostic information (reading DTCs and reading input/output signal) by sending and receiving signals between the instrument cluster and an external tester.

Connection And Communication Information

 

External Tester

Mazda Modular Diagnostic System (M-MDS)

Connection

Communication Method
On-board diagnostic (malfunction detection) function
Input/output: CAN communication line
Serial communication
PID/Data monitor function
Input/output: CAN communication line
Serial communication


Serial Communication

•  Serial communication (synchronous communication) is a method of communication in which many pieces of information are sent and received instantaneously through a single wire.
•  By connecting the Mazda Modular Diagnostic System (M-MDS) to DLC-2, diagnostic information can be sent and received between the Mazda Modular Diagnostic System (M-MDS) and the instrument cluster via the CAN communication line.
•  The instrument cluster receives signals for the malfunction detection function and data monitor function from the Mazda Modular Diagnostic System (M-MDS), and sends information about DTCs and input/output part operating conditions to the Mazda Modular Diagnostic System (M-MDS).

Diagnostic Function

Signal Received

Signal Sent
Malfunction detection function
DTC verification signal
DTC
PID/Data monitor function
Request signal to read selected monitor item
Monitor information for requested monitor item