ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (ELECTRO HYDRAULIC POWER ASSIST STEERING)
id060200100200
Outline
• The external tester communication function enables communication of diagnostic data (DTC read-outs, input/output signal read-outs) between the EHPAS control module 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 EHPAS control module via CAN lines.
• The EHPAS control module receives the command signals of the malfunction detection function and PID/data monitor function from the WDS or equivalent, and sends DTCs and data regarding the operating status of each input/output part to the WDS or equivalent.
