On-Board Diagnostic System External Tester Communication Function; Connections And Communication Contents; Serial Communication - Mazda CX-9 2007 Service Highlights

ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION

• 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

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

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).
Diagnostic function name
Malfunction detection function
PID/data monitor function
Active command modes function
End Of Sie
04-02–10
ON-BOARD DIAGNOSTIC
Mazda Modular Diagnostic System (M-MDS)
Connection
Input/output: HS_CAN_H, HS_CAN_L
Input/output: HS_CAN_H, HS_CAN_L
Input/output: HS_CAN_H, HS_CAN_L)
Signal received
DTC verification signal
Command signal to read selected
monitor item
Operation command signal for selected
active command modes item
External tester
Communication method
Serial communication
Serial communication
Serial communication
DLC-2
DTC
Monitored data for requested monitor
item
Input/output part name
id040200110900
ac9uuw00000862
Signal sent