On-Board Diagnostic System External Tester Communication Function; External Tester Communication Function; Serial Communication; Dlc-2 Construction - Mazda RX-8 2004 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 TPMS control module and an external tester.
Connection and communication information
On-board diagnostic (malfunction
detection) function
PID/Data monitor 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 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.
Diagnostic function
Malfunction detection function
PID/Data monitor 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, CAN_L,
GND1, GND2 and B+ terminals.
Terminal
CAN_L
CAN_H
GND1
GND2
B+
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02–02–4
2004 Mazda RX-8 Service Highlights (3378–1U–03C)
ON-BOARD DIAGNOSTIC
Connection
Input/output: CAN communication line
Input/output: CAN communication line
Signal received
DTC verification signal
Request signal to read selected monitor
item
B+ CAN_L
CAN_H GND2
Serial communication terminal (Lo)
Serial communication terminal (Hi)
Body ground terminal
Serial communication ground terminal
Battery power supply terminal
External tester
WDS or equivalent
Serial communication
Serial communication
DTC
Monitor information for requested
monitor item
DLC-2
GND1
Function
CHU020237020S04
Communication method
Signal sent
CHU020237020S05
CHU0602S002