ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION [ELECTRIC POWER STEERING (EPS)]
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Outline
• 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 EPS CM and an external tester.
Connections/Communication Contents
External tester
WDS
Connection
Communication method
On-board diagnostic (malfunction detection) function
Input/output: CAN_H, CAN_L
Serial communication
PID/DATA monitor function
Input/output: CAN_H, CAN_L
Serial communication
Serial communication
• Serial communication (two-way communication) allows for multiple data to be sent and received instantly along the same line.
• By connecting the WDS or equivalent to the DLC-2, diagnostic data can be sent and received between the WDS or equivalent and the EPS CM via CAN communication lines.
• The EPS CM receives the command signals of the malfunction detection function, PID/data monitor function, and the active command modes function from the WDS or equivalent, and sends DTCs and data regarding the operating condition and status of each input/output part to the WDS or equivalent.
