ON-BOARD DIAGNOSTIC
04–02–9
04–02
ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (ABS, DYNAMIC
STABILITY CONTROL)
E5U040243750N05
• 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 ABS HU/CM or the DSC HU/CM and
an external tester.
Connections and Communication Contents
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 ABS HU/
CM or DSC HU/CM using the CAN_H and CAN_L
terminals (within the DLC-2).
• The ABS HU/CM or DSC HU/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.
End Of Sie
External tester
WDS or equivalent
Connection Communication method
On-board diagnostic
(malfunction detection)
function
Input/output: CAN_H (HS), CAN_L (HS) Serial communication
PID/DATA monitor function Input/output: CAN_H (HS), CAN_L (HS) Serial communication
Active command modes
function
Input/output: CAN_H (HS), CAN_L (HS) Serial communication
DLC-2
E5U402AW5001
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 requested monitor
item
Active command modes function
Operation command signal for selected
active command modes item
Input/output part name
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