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
Active command modes 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
Active command modes function
Operation command signal for selected active command modes item
Wheel unit ID registration