ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL DIAGNOSTIC UNIT COMMUNICATION FUNCTION [LF, L5]

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Outline

•  Function for allowing both the PCM and external tester to receive and send data.
•  The DLC-2 has been adopted as the communication medium.
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Function

•  The types of data which the PCM and external tester can receive and send using the external tester communication function include the following items:
―  Recording of engine control system information in the PCM.
―  Data related to exhaust emission such as input/output signals, the PCM-calculated values and system status.

DLC-2 Outline

•  The DLC-2 located in the driver compartment is a service connector defined by EOBD regulations.
•  The following are functions for each terminal.
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Terminal

Function
B+
Battery positive voltage
CAN-L (HS)
CAN communication line Lo (HS)
CAN-H (HS)
CAN communication line Hi (HS)
CAN-L (MS)
CAN communication line Lo (MS)
CAN-H (MS)
CAN communication line Hi (MS)
GND1
Ground (chassis)
GND2
Ground (signal)