ON-BOARD DIAGNOSTIC
04-02–10
ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION
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• The external tester communication function enables communication of diagnostic data (DTC read-outs, input/
output signal read-outs, and operation of input/output parts) between the dynamic stability control (DSC)/roll
stability control (RSC) hydraulic unit (HU)/control module (CM) and an external tester.
Connections and Communication Contents
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/RSC HU/CM using the HS_CAN_H and
HS_CAN_L terminals (within the DLC-2).
• The DSC/RSC HU/CM receives the command
signals of the malfunction detection function,
parameter identification (PID)/data monitor
function, and the active command modes function
from 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).
End Of Sie
External tester
Mazda Modular Diagnostic System (M-MDS)
Connection Communication method
On-board diagnostic
(malfunction detection)
function
Input/output: HS_CAN_H, HS_CAN_L Serial communication
PID/DATA monitor function Input/output: HS_CAN_H, HS_CAN_L Serial communication
Active command modes
function
Input/output: HS_CAN_H, HS_CAN_L) Serial communication
DLC-2
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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
Input/output part name
3423-1U-06H(04-02).fm 10 ページ ２００６年１１月２１日 火曜日 午後５時１２分
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