ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (ELECTRIC POWER STEERING)


BHE060201038T05

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 control module and an external tester.

Connections/Communication Contents

 

External tester

WDS

Connection

Communication method

Self-diagnosis (malfunction detection) function
Input/output: CAN_H, CAN_L
Serial communication
PID/data monitor function
Input/output: CAN_H, CAN_L
Serial communication
Active command modes 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 control module via CAN communication lines.
• The EPS control module 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.

Diagnostic function name

Signal received

Signal sent

Malfunction detection function
DTC verification signal
DTC
PID/data monitor function
Command signal to read selected monitor item
Monitored data for selected monitor item
Active command modes function
Operation command signal for selected active command item
Output part operation signal and system neutral position setting