Monitoring System); External Tester; External Tester Communication Function; Serial Communication - Mazda CX-9 2007 Service Highlights

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

MONITORING SYSTEM)

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
On-board diagnostic (malfunction
detection) function
PID/Data monitor function
Active command modes function

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
Malfunction detection function
PID/Data monitor function
Active command modes function
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DLC-2 CONSTRUCTION

• 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.
Terminal
CAN_L (HS)
CAN_H (HS)
CAN_L (MS)
CAN_H (MS)
GND1
GND2
B+
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ON-BOARD DIAGNOSTIC
Mazda Modular Diagnostic System (M-MDS)
Connection
Input/output: CAN communication line
Input/output: CAN communication line
Input/output: CAN communication line
Signal received
DTC verification signal
Request signal to read selected monitor
item
Operation command signal for selected
active command modes item
DLC-2
CAN_L
B+
(HS)
CAN_H
GND2 GND1
(HS)
Serial communication Lo terminal (HS)
Serial communication Hi terminal (HS)
Serial communication Lo terminal (MS)
Serial communication Hi terminal (MS)
Body ground terminal
Serial communication ground terminal
Battery power supply terminal

External tester

Communication method
Serial communication
Serial communication
Serial communication
Signal sent
DTC
Monitor information for requested
monitor item
Wheel unit ID registration
CAN_L
(MS)
CAN_H
(MS)
Function
id020200100600
02-02
id020200100700
acxuun00000291
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