ON-BOARD DIAGNOSTIC SYSTEM EXTERNAL TESTER COMMUNICATION FUNCTION (ABS, DYNAMIC STABILITY CONTROL)
id040200100500
• 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/Communication Contents
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External tester
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WDS or equivalent
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Connection
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Communication method
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On-board diagnostic (malfunction detection) function
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Input/output: CAN_H, CAN_L terminals
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Serial communication
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PID/DATA monitor function
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Input/output: CAN_H, CAN_L terminals
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Serial communication
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Active command modes function
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Input/output: CAN_H, CAN_L terminals
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Serial communication
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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.
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Diagnostic function name
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Signal received
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Signal sent
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Malfunction detection function
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DTC verification signal
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Diagnostic trouble code
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PID/DATA monitor function
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Command signal to read selected monitor item
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Monitored data for requested monitor item
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Active command modes function
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Operation command signal for selected active command modes item
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Output part drive signal
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