Serial Communication; Dlc-2 Construction - Mazda 2006 MX-5 Service Highlights

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 instrument cluster via the CAN communication line.
• The instrument cluster 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
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, CAN_L,
GND1, GND2 and B+ terminals.
Terminal
CAN _L
CAN_H
GND1
GND2
B+
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ON-BOARD DIAGNOSTIC
Signal received
DTC verification signal
Request signal to read selected monitor
item
Operation command signal for selected
active command modes item
DLC-2
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
DTC
Monitor information for requested
monitor item
Wheel unit ID registration
GND1
Function
Signal sent
E5U020237020N05
CHU0602S002
02–02–7
02–02