ON-BOARD DIAGNOSTIC
02-02–7
02-02
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
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).
End Of Sie
DLC-2 CONSTRUCTION
id020200100700
• A DLC-2 connector conforming to ISO (International Organization for Standardization) standards has been
added.
• Shape and terminal arrangement as stipulated by the ISO 15031-3 (SAE J1962) international standard has
been adopted for this connector. The connector has a 16-pin construction that includes the CAN_H (HS),
CAN_L (HS), CAN_H (MS), CAN_L (MS), GND1, GND2 and B+ terminals.
End Of Sie
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
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
Terminal Function
CAN_L (HS) Serial communication Lo terminal (HS)
CAN_H (HS) Serial communication Hi terminal (HS)
CAN_L (MS) Serial communication Lo terminal (MS)
CAN_H (MS) Serial communication Hi terminal (MS)
GND1 Body ground terminal
GND2 Serial communication ground terminal
B+ Battery power supply terminal
DLC-2
B+
CAN_L
(HS)
CAN_H
(HS)
GND2 GND1
CAN_L
(MS)
CAN_H
(MS)
acxuun00000291
3423-1U-06H(02-02).fm 7 ページ ２００６年１１月２１日 火曜日 午後５時５分
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