ON-BOARD DIAGNOSTIC
02–02–4
2004 Mazda RX-8 Service Highlights (3378–1U–03C)
ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (TIRE PRESSURE
MONITORING SYSTEM)
CHU020237020S04
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 TPMS control module 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 WDS or equivalent to DLC-2, diagnostic information can be sent and received between the
WDS or equivalent and the TPMS control module via the CAN communication line.
•
The TPMS control module receives signals for the malfunction detection function and data monitor function
from the WDS or equivalent, and sends information about DTCs and input/output part operating conditions to
the WDS or equivalent.
End Of Sie
DLC-2 CONSTRUCTION
CHU020237020S05
•
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, CAN_L,
GND1, GND2 and B+ terminals.
End Of Sie
External tester
WDS or equivalent
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
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
Terminal
Function
CAN_L
Serial communication terminal (Lo)
CAN_H
Serial communication terminal (Hi)
GND1
Body ground terminal
GND2
Serial communication ground terminal
B+
Battery power supply terminal
B+
CAN_L
GND1
CAN_H GND2
DLC-2
CHU0602S002
Содержание 2004 RX-8
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